OCHomilyChart/Modules/Chart/Controller/ChartViewController.m

//
//  ChartViewController.m
//  HC
//
//  Created by huilinLi on 2025/11/27.
//

#import "ChartViewController.h"
#import "StockKLineModel.h"
#import "StockInfoCardView.h"
#import "ChartAPI.h"

static CGFloat kLineUnitWidth = 5.0; // 单位宽度
static CGFloat kPriceLabelAreaWidth = 35.0;
static CGFloat kPriceLabelPadding = 10.0;
static CGFloat kKLineHeight = 300.0;
static CGFloat kContainerHeight = 120.0;

@interface ChartViewController () <UIGestureRecognizerDelegate, UIScrollViewDelegate>

@property (nonatomic, strong) StockInfoCardView *cardContainer;
@property (nonatomic, strong) UIView *kSelectContainer;
@property (nonatomic, strong) UIView *kLineContainer;
@property (nonatomic, strong) UIView *macdContainer;
@property (nonatomic, strong) UIView *kdjContainer;
@property (nonatomic, strong) UIView *otherContainer;
@property (nonatomic, strong) UIScrollView *kLineScrollView;
@property (nonatomic, strong) NSArray *kLineData;
@property (nonatomic, assign) NSInteger visibleKLineCount;
@property (nonatomic, strong) NSArray<UILabel *> *priceLabels;
@property (nonatomic, strong) UILabel *startDateLabel;
@property (nonatomic, strong) UILabel *endDateLabel;
@property (nonatomic, strong) UILabel *maLegendLabel;   // MA5
@property (nonatomic, strong) UILabel *macdLegendLabel; // DIF DEA
@property (nonatomic, strong) UILabel *kdjLegendLabel;  // K D
@property (nonatomic, strong) UILabel *highPriceMarkLabel;
@property (nonatomic, strong) UILabel *lowPriceMarkLabel;
@property (nonatomic, assign) CGFloat currentMaxPrice;
@property (nonatomic, assign) CGFloat currentMinPrice;
@property (nonatomic, assign) CGFloat macdMaxValue;
@property (nonatomic, assign) CGFloat macdMinValue;
@property (nonatomic, assign) CGFloat kdjMaxValue;
@property (nonatomic, assign) CGFloat kdjMinValue;

// K线图层
@property (nonatomic, strong) CAShapeLayer *redCandleLayer;
@property (nonatomic, strong) CAShapeLayer *greenCandleLayer;

// 均线图层
@property (nonatomic, strong) CAShapeLayer *ma5Layer;
@property (nonatomic, strong) CAShapeLayer *ma10Layer;
@property (nonatomic, strong) CAShapeLayer *ma30Layer;

// MACD图层
@property (nonatomic, strong) CAShapeLayer *macdRedBarLayer;
@property (nonatomic, strong) CAShapeLayer *macdGreenBarLayer;
@property (nonatomic, strong) CAShapeLayer *difLayer;
@property (nonatomic, strong) CAShapeLayer *deaLayer;
@property (nonatomic, strong) CAShapeLayer *zeroLineLayer;

// KDJ图层
@property (nonatomic, strong) CAShapeLayer *kLayer;
@property (nonatomic, strong) CAShapeLayer *dLayer;
@property (nonatomic, strong) CAShapeLayer *jLayer;

@property (nonatomic, strong) UIView *crossVerticalLine;
@property (nonatomic, strong) UIView *crossHorizontalLine;
@property (nonatomic, strong) UILabel *crossPriceLabel;
@property (nonatomic, strong) UILabel *crossDateLabel;
@property (nonatomic, assign) BOOL isLongPressing;

@end

@implementation ChartViewController

#pragma mark - viewDidLoad
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor blackColor];
    
    self.visibleKLineCount = 40;

    [self generateMockData];
    
    [self calculateMA];
    [self calculateMACD];
    [self calculateKDJ];
    
    [self setupSubviews];
    [self setupConstraints];
    [self setupDojiViews];
    
    CGFloat chartVisibleWidth = self.view.bounds.size.width - kPriceLabelAreaWidth;
    if (chartVisibleWidth > 0) {
        kLineUnitWidth = chartVisibleWidth / self.visibleKLineCount;
    }

    dispatch_async(dispatch_get_main_queue(), ^{
        CGFloat totalChartWidth = kLineUnitWidth * self.kLineData.count;
        self.kLineScrollView.contentSize = CGSizeMake(totalChartWidth, self.kLineContainer.bounds.size.height);
        
        // 滚到最右侧
        if (self.kLineScrollView.contentSize.width > self.kLineScrollView.bounds.size.width) {
            CGPoint offset = CGPointMake(self.kLineScrollView.contentSize.width - self.kLineScrollView.bounds.size.width, 0);//（横向偏移，纵向）
            [self.kLineScrollView setContentOffset:offset animated:NO];// 禁用动画效果
        }
        
        [self drawAllCharts];
    });
}

#pragma mark - 绘制

- (void)drawAllCharts {
    if (self.kLineData.count == 0) return;
    
    // 获取当前ScrollView滚到了哪里
    CGFloat contentOffsetX = self.kLineScrollView.contentOffset.x;
    // 可视区域宽度
    CGFloat visibleWidth = self.kLineScrollView.bounds.size.width;
    
    NSInteger startIndex = floor(contentOffsetX / kLineUnitWidth);// 向下取整
    NSInteger endIndex = ceil((contentOffsetX + visibleWidth) / kLineUnitWidth);// 向上取整
    
    // 防止越界
    if (startIndex < 0) startIndex = 0;
    if (endIndex >= self.kLineData.count) endIndex = self.kLineData.count - 1;
    if (startIndex > endIndex) endIndex = startIndex;
    
    // 把start,end和偏移量传给所有子视图
    [self drawKLineChartFromIndex:startIndex toIndex:endIndex contentOffset:contentOffsetX];
    [self drawMACDChartFromIndex:startIndex toIndex:endIndex contentOffset:contentOffsetX];
    [self drawKDJChartFromIndex:startIndex toIndex:endIndex contentOffset:contentOffsetX];
    
    // 更新指标参数
    if (!self.isLongPressing) {
        NSInteger visibleEndIndex = endIndex;
        
        CGFloat visibleRightX = contentOffsetX + self.kLineScrollView.bounds.size.width;
        
        NSInteger calculatedIndex = floor(visibleRightX / kLineUnitWidth) - 1;
        
        if (calculatedIndex < 0) calculatedIndex = 0;
        if (calculatedIndex >= self.kLineData.count) calculatedIndex = self.kLineData.count - 1;
        
        visibleEndIndex = calculatedIndex;
        
        [self updateLegendsWithIndex:visibleEndIndex];
    }
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (self.isLongPressing) {
        self.isLongPressing = NO;
        self.crossVerticalLine.hidden = YES;
        self.crossHorizontalLine.hidden = YES;
        self.crossPriceLabel.hidden = YES;
        self.crossDateLabel.hidden = YES;
    }
    [self drawAllCharts];
}

#pragma mark - 绘制K线+均线

- (void)drawKLineChartFromIndex:(NSInteger)startIndex toIndex:(NSInteger)endIndex contentOffset:(CGFloat)contentOffsetX {
    // 图层大小=容器大小
    CGRect bounds = self.kLineContainer.bounds;
    self.redCandleLayer.frame = bounds;
    self.greenCandleLayer.frame = bounds;
    self.ma5Layer.frame = bounds;
    self.ma10Layer.frame = bounds;
    self.ma30Layer.frame = bounds;
    
    CGFloat chartHeight = bounds.size.height;
    
    // 最高最低价
    CGFloat maxPrice = 0, minPrice = 0;
    NSInteger maxIndex = -1, minIndex = -1;
    [self calculateMinMaxPriceForStartIndex:startIndex endIndex:endIndex maxPrice:&maxPrice minPrice:&minPrice maxIndex:&maxIndex minIndex:&minIndex];//将计算出的最高价赋值给max/minPrice
    
    self.currentMaxPrice = maxPrice;
    self.currentMinPrice = minPrice;
    
    CGFloat priceRange = maxPrice - minPrice;
    if (priceRange <= 0) {
        self.redCandleLayer.path = nil;
        return;
    }
    
    // 更新价格和日期
    [self updatePriceLabelsWithMaxPrice:maxPrice minPrice:minPrice];
    [self updateDateLabelsStartIndex:startIndex endIndex:endIndex];

    // 准备路径
    UIBezierPath *redPath = [UIBezierPath bezierPath];// 涨的路径
    UIBezierPath *greenPath = [UIBezierPath bezierPath];// 跌的路径
    UIBezierPath *ma5Path = [UIBezierPath bezierPath];// 均线路径
    UIBezierPath *ma10Path = [UIBezierPath bezierPath];
    UIBezierPath *ma30Path = [UIBezierPath bezierPath];
    
    CGFloat kLineWidth = kLineUnitWidth * 0.8;// k线实体宽度，0.2是间隔
    BOOL f5 = YES, f10 = YES, f30 = YES;
    // 路径是否是第一个点（第一个点用moveToPoint，后面用addLineToPoint）

    for (NSInteger i = startIndex; i <= endIndex; i++) {
        StockKLineModel *model = self.kLineData[i];
        
        // 坐标转换
        CGFloat xCenter = [self getScreenCenterXAtIndex:i contentOffset:contentOffsetX];
        CGFloat xLeft = xCenter - kLineWidth / 2.0;

        // 高度 * （最高价 - 当前价）/ 价格区间
        CGFloat yOpen = chartHeight * (maxPrice - model.open) / priceRange;
        CGFloat yClose = chartHeight * (maxPrice - model.close) / priceRange;
        CGFloat yHigh = chartHeight * (maxPrice - model.high) / priceRange;
        CGFloat yLow = chartHeight * (maxPrice - model.low) / priceRange;
        
        UIBezierPath *targetPath = (model.close >= model.open) ? redPath : greenPath;
        
        [targetPath moveToPoint:CGPointMake(xCenter, yHigh)];
        [targetPath addLineToPoint:CGPointMake(xCenter, yLow)];// 影线
        // 实体
        [targetPath appendPath:[UIBezierPath bezierPathWithRect:
                                CGRectMake(xLeft,// 左边界
                                           MIN(yOpen, yClose),// 上边界
                                           kLineWidth,// 宽
                                           MAX(1.0, fabs(yClose - yOpen)))]];// 高
        
        // 绘制均线
        void (^drawMA)(UIBezierPath*, CGFloat, BOOL*) = ^(UIBezierPath *p, CGFloat v, BOOL *f) {
            if (v > 0) {
                CGFloat y = chartHeight * (maxPrice - v) / priceRange;// y轴
                if (*f) {// 是第一个点
                    [p moveToPoint:CGPointMake(xCenter, y)];// 移动到起点
                    *f = NO; }// 起点已设置
                else { [p addLineToPoint:CGPointMake(xCenter, y)]; }// 连线，从上一个点链接这个点
            }
        };
        drawMA(ma5Path, model.MA5, &f5);
        drawMA(ma10Path, model.MA10, &f10);
        drawMA(ma30Path, model.MA30, &f30);
    }
    
    [CATransaction begin];// 开启Core Animation事务
    [CATransaction setDisableActions:YES];// 禁止动画
    self.redCandleLayer.path = redPath.CGPath;// 图层绑定
    self.greenCandleLayer.path = greenPath.CGPath;
    self.ma5Layer.path = ma5Path.CGPath;
    self.ma10Layer.path = ma10Path.CGPath;
    self.ma30Layer.path = ma30Path.CGPath;
    [CATransaction commit];// 事务提交
    
    // 更新最高最低价的箭头位置
    [self updateMaxMinArrowsWithMaxIndex:maxIndex minIndex:minIndex maxPrice:maxPrice minPrice:minPrice chartHeight:chartHeight range:priceRange contentOffsetX:contentOffsetX];
}

#pragma mark - 绘制MACD
- (void)drawMACDChartFromIndex:(NSInteger)startIndex toIndex:(NSInteger)endIndex contentOffset:(CGFloat)contentOffsetX {
    CGRect bounds = self.macdContainer.bounds;
    self.macdRedBarLayer.frame = bounds;
    self.macdGreenBarLayer.frame = bounds;
    self.difLayer.frame = bounds;
    self.deaLayer.frame = bounds;
    self.zeroLineLayer.frame = bounds;
    
    CGFloat h = bounds.size.height;
    
    // 计算极值
    CGFloat maxV = -MAXFLOAT, minV = MAXFLOAT;// 先给正负无穷
    for (NSInteger i = startIndex; i <= endIndex; i++) {
        StockKLineModel *m = self.kLineData[i];
        maxV = MAX(maxV, MAX(m.macdBar, MAX(m.dif, m.dea)));
        minV = MIN(minV, MIN(m.macdBar, MIN(m.dif, m.dea)));
    }
    if (maxV == minV) { maxV += 1; minV -= 1; }
    self.macdMaxValue = maxV;
    self.macdMinValue = minV;
    CGFloat range = maxV - minV;
    CGFloat zeroY = h * (maxV - 0) / range;
    
    UIBezierPath *rPath = [UIBezierPath bezierPath];
    UIBezierPath *gPath = [UIBezierPath bezierPath];
    UIBezierPath *dPath = [UIBezierPath bezierPath];
    UIBezierPath *ePath = [UIBezierPath bezierPath];
    UIBezierPath *zPath = [UIBezierPath bezierPath];
    [zPath moveToPoint:CGPointMake(0, zeroY)];// 0轴起点
    [zPath addLineToPoint:CGPointMake(bounds.size.width, zeroY)];// 0轴终点
    
    CGFloat barWidth = kLineUnitWidth * 0.2;
    BOOL first = YES;// 快线慢线起点标记
    
    for (NSInteger i = startIndex; i <= endIndex; i++) {
        StockKLineModel *m = self.kLineData[i];
        
        CGFloat xCenter = [self getScreenCenterXAtIndex:i contentOffset:contentOffsetX];
        CGFloat xLeft = xCenter - barWidth/2.0;
        
        CGFloat yBar = h * (maxV - m.macdBar) / range;
        CGFloat barY = (m.macdBar > 0) ? yBar : zeroY;// 上边界
        
        CGFloat barH = MAX(0.5, fabs(zeroY - yBar));// 高度，大于0.5，省得看不见

        UIBezierPath *tp = (m.macdBar > 0) ? rPath : gPath;
        [tp appendPath:[UIBezierPath bezierPathWithRect:
                        CGRectMake(xLeft,
                                   barY,
                                   barWidth,
                                   barH)]];
        
        CGFloat yD = h * (maxV - m.dif) / range;
        CGFloat yE = h * (maxV - m.dea) / range;
        
        if (first) {
            [dPath moveToPoint:CGPointMake(xCenter, yD)];
            [ePath moveToPoint:CGPointMake(xCenter, yE)];
            first = NO;
        } else {
            [dPath addLineToPoint:CGPointMake(xCenter, yD)];
            [ePath addLineToPoint:CGPointMake(xCenter, yE)];
        }
    }
    
    [CATransaction begin];
    [CATransaction setDisableActions:YES];
    self.macdRedBarLayer.path = rPath.CGPath;
    self.macdGreenBarLayer.path = gPath.CGPath;
    self.difLayer.path = dPath.CGPath;
    self.deaLayer.path = ePath.CGPath;
    self.zeroLineLayer.path = zPath.CGPath;
    [CATransaction commit];
}

#pragma mark - 绘制KDJ
- (void)drawKDJChartFromIndex:(NSInteger)startIndex toIndex:(NSInteger)endIndex contentOffset:(CGFloat)contentOffsetX {
    self.kLayer.frame = self.kdjContainer.bounds;
    self.dLayer.frame = self.kdjContainer.bounds;
    self.jLayer.frame = self.kdjContainer.bounds;
    
    CGFloat h = self.kdjContainer.bounds.size.height;
    
    CGFloat maxV = 0, minV = 100;
    for (NSInteger i = startIndex; i <= endIndex; i++) {
        StockKLineModel *m = self.kLineData[i];
        maxV = MAX(maxV, MAX(m.K, MAX(m.D, m.J)));
        minV = MIN(minV, MIN(m.K, MIN(m.D, m.J)));
    }
    self.kdjMaxValue = maxV;
    self.kdjMinValue = minV;
    CGFloat range = maxV - minV;
    if (range <= 0) range = 1;
    
    UIBezierPath *kp = [UIBezierPath bezierPath];
    UIBezierPath *dp = [UIBezierPath bezierPath];
    UIBezierPath *jp = [UIBezierPath bezierPath];
    BOOL first = YES;
    
    for (NSInteger i = startIndex; i <= endIndex; i++) {
        StockKLineModel *m = self.kLineData[i];
        CGFloat xCenter = [self getScreenCenterXAtIndex:i contentOffset:contentOffsetX];
        
        CGFloat yK = h * (maxV - m.K) / range;
        CGFloat yD = h * (maxV - m.D) / range;
        CGFloat yJ = h * (maxV - m.J) / range;
        
        if (first) {
            [kp moveToPoint:CGPointMake(xCenter, yK)];
            [dp moveToPoint:CGPointMake(xCenter, yD)];
            [jp moveToPoint:CGPointMake(xCenter, yJ)];
            first = NO;
        } else {
            [kp addLineToPoint:CGPointMake(xCenter, yK)];
            [dp addLineToPoint:CGPointMake(xCenter, yD)];
            [jp addLineToPoint:CGPointMake(xCenter, yJ)];
        }
    }
    
    [CATransaction begin];
    [CATransaction setDisableActions:YES];
    self.kLayer.path = kp.CGPath;
    self.dLayer.path = dp.CGPath;
    self.jLayer.path = jp.CGPath;
    [CATransaction commit];
}

#pragma mark - 坐标计算
// 获取某根K线在屏幕上的x轴中心坐标
- (CGFloat)getScreenCenterXAtIndex:(NSInteger)index contentOffset:(CGFloat)offsetX {
    // 半个单位宽+索引*宽
    CGFloat x = kLineUnitWidth * (index + 0.5);
    // 屏幕坐标 = 绝对坐标 - 滚动偏移量 + 左侧空白区
    return x - offsetX + kPriceLabelAreaWidth;
}

#pragma mark - 极值箭头更新
- (void)updateMaxMinArrowsWithMaxIndex:(NSInteger)maxIdx minIndex:(NSInteger)minIdx maxPrice:(CGFloat)maxPrice minPrice:(CGFloat)minPrice chartHeight:(CGFloat)height range:(CGFloat)range contentOffsetX:(CGFloat)offsetX {
    
    void (^updateLabel)(UILabel *, NSInteger, CGFloat) = ^(UILabel *label, NSInteger index, CGFloat price) {
        if (index >= 0 && index < self.kLineData.count) {
            label.hidden = NO;
            CGFloat xCenter = [self getScreenCenterXAtIndex:index contentOffset:offsetX];
            CGFloat y = height * (maxPrice - price) / range;// y轴位置
            
            // 默认放在k线右边
            label.text = [NSString stringWithFormat:@"← %.2f", price];
            [label sizeToFit];// 根据文字尺寸自适应标签长度
            CGFloat targetX = xCenter + kLineUnitWidth/2.0 + 2 + label.bounds.size.width/2.0;
            label.center = CGPointMake(targetX, y);
            
            // 如果label不在屏幕内，就放到k线左边
            if (CGRectGetMaxX(label.frame) > self.kLineContainer.bounds.size.width) {
                label.text = [NSString stringWithFormat:@"%.2f →", price];
                [label sizeToFit];
                targetX = xCenter - kLineUnitWidth/2.0 - 2 - label.bounds.size.width/2.0;
                label.center = CGPointMake(targetX, y);
            }
        } else {
            label.hidden = YES;
        }
    };
    
    StockKLineModel *maxModel = self.kLineData[maxIdx];
    updateLabel(self.highPriceMarkLabel, maxIdx, maxModel.high);
    
    StockKLineModel *minModel = self.kLineData[minIdx];
    updateLabel(self.lowPriceMarkLabel, minIdx, minModel.low);
}

#pragma mark - 更新指标数值
- (void)updateLegendsWithIndex:(NSInteger)index {
    if (index < 0 || index >= self.kLineData.count) return;
    
    StockKLineModel *m = self.kLineData[index];

    NSMutableAttributedString * (^createStr)(NSString *, UIColor *) = ^(NSString *txt, UIColor *col) {
        return [[NSMutableAttributedString alloc] initWithString:txt attributes:@{NSForegroundColorAttributeName: col}];
    };
    
    // MA
    NSMutableAttributedString *maStr = [[NSMutableAttributedString alloc] init];
    [maStr appendAttributedString:createStr([NSString stringWithFormat:@"MA5:%.2f  ", m.MA5], [UIColor yellowColor])];
    [maStr appendAttributedString:createStr([NSString stringWithFormat:@"MA10:%.2f  ", m.MA10], [UIColor magentaColor])];
    [maStr appendAttributedString:createStr([NSString stringWithFormat:@"MA30:%.2f", m.MA30], [UIColor cyanColor])];
    self.maLegendLabel.attributedText = maStr;
    
    // MACD
    NSMutableAttributedString *macdStr = [[NSMutableAttributedString alloc] init];
    [macdStr appendAttributedString:createStr([NSString stringWithFormat:@"DIF:%.2f  ", m.dif], [UIColor whiteColor])];
    [macdStr appendAttributedString:createStr([NSString stringWithFormat:@"DEA:%.2f  ", m.dea], [UIColor yellowColor])];
    UIColor *barColor = (m.macdBar > 0) ? [UIColor redColor] : [UIColor greenColor];
    [macdStr appendAttributedString:createStr([NSString stringWithFormat:@"MACD:%.2f", m.macdBar], barColor)];
    self.macdLegendLabel.attributedText = macdStr;
    
    // KDJ
    NSMutableAttributedString *kdjStr = [[NSMutableAttributedString alloc] init];
    [kdjStr appendAttributedString:createStr([NSString stringWithFormat:@"K:%.2f  ", m.K], [UIColor whiteColor])];
    [kdjStr appendAttributedString:createStr([NSString stringWithFormat:@"D:%.2f  ", m.D], [UIColor yellowColor])];
    [kdjStr appendAttributedString:createStr([NSString stringWithFormat:@"J:%.2f", m.J], [UIColor magentaColor])];
    self.kdjLegendLabel.attributedText = kdjStr;
}

#pragma mark - 手势与缩放
- (void)handlePinchGesture:(UIPinchGestureRecognizer *)gesture {
    if (self.isLongPressing) {// 缩放不显示十字星
        self.isLongPressing = NO;
        self.crossVerticalLine.hidden = YES;
        self.crossHorizontalLine.hidden = YES;
        self.crossPriceLabel.hidden = YES;
        self.crossDateLabel.hidden = YES;
    }
    
    if (gesture.state == UIGestureRecognizerStateChanged) {
        CGFloat scale = gesture.scale;
        CGFloat minUnitWidth = (self.view.bounds.size.width - kPriceLabelAreaWidth) / 500.0;
        CGFloat maxUnitWidth = 40.0;
        
        CGFloat newUnitWidth = MAX(minUnitWidth, MIN(kLineUnitWidth * scale, maxUnitWidth));
        
        // 屏幕中心点缩放
        CGFloat ratio = (self.kLineScrollView.contentOffset.x + self.kLineScrollView.bounds.size.width/2.0) / self.kLineScrollView.contentSize.width;
        kLineUnitWidth = newUnitWidth;// 全局更新
        
        // 新的滚动视图的内容宽度
        CGFloat newContentWidth = kLineUnitWidth * self.kLineData.count;
        self.kLineScrollView.contentSize = CGSizeMake(newContentWidth, self.kLineContainer.bounds.size.height);
        
        // 新的偏移量
        CGFloat newOffset = ratio * newContentWidth - self.kLineScrollView.bounds.size.width/2.0;
        self.kLineScrollView.contentOffset = CGPointMake(MAX(0, newOffset), 0);
        
        [self drawAllCharts];
        gesture.scale = 1.0;
    }
}

#pragma mark - 数据生成
- (void)generateMockData {
    NSMutableArray *arr = [NSMutableArray array];
    CGFloat lastClose = 100.0;
    for (int i = 0; i < 2000; i++) {
        StockKLineModel *model = [[StockKLineModel alloc] init];
        NSDate *date = [NSDate dateWithTimeIntervalSinceNow:-(2000 - i) * 24 * 3600];
        NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
        [fmt setDateFormat:@"yyyy-MM-dd"];
        model.date = [fmt stringFromDate:date];
        CGFloat volatility = lastClose * 0.02;
        CGFloat randomChange = ((arc4random() % 100) / 100.0 - 0.5) * 2 * volatility;
        model.open = lastClose + ((arc4random() % 100) / 100.0 - 0.5) * volatility * 0.5;
        model.close = model.open + randomChange;
        CGFloat maxOC = MAX(model.open, model.close);
        CGFloat minOC = MIN(model.open, model.close);
        model.high = maxOC + (arc4random() % 100) / 100.0 * 1.0;
        model.low = minOC - (arc4random() % 100) / 100.0 * 1.0;
        if (model.low < 0) model.low = 0.01;
        [arr addObject:model];
        lastClose = model.close;
    }
    self.kLineData = arr;
}

- (void)calculateMA {
    for (int i = 0; i < self.kLineData.count; i++) {
        StockKLineModel *model = self.kLineData[i];
        model.MA5 = [self getMAWithIndex:i count:5];
        model.MA10 = [self getMAWithIndex:i count:10];
        model.MA30 = [self getMAWithIndex:i count:30];
    }
}
- (CGFloat)getMAWithIndex:(NSInteger)index count:(NSInteger)count {
    if (index < count - 1) return 0;
    CGFloat sum = 0;
    for (NSInteger i = index; i > index - count; i--) {
        StockKLineModel *m = self.kLineData[i];
        sum += m.close;
    }
    return sum / count;
}
- (void)calculateMACD {
    if (self.kLineData.count == 0) return;
    const CGFloat kShortEMA = 2.0 / (12 + 1);
    const CGFloat kLongEMA = 2.0 / (26 + 1);
    const CGFloat kSignalEMA = 2.0 / (9 + 1);
    CGFloat lastShortEMA = 0, lastLongEMA = 0, lastDEA = 0;
    for (int i = 0; i < self.kLineData.count; i++) {
        StockKLineModel *model = self.kLineData[i];
        CGFloat close = model.close;
        if (i == 0) {
            lastShortEMA = close; lastLongEMA = close;
            model.dif = 0; model.dea = 0; model.macdBar = 0;
        } else {
            lastShortEMA = kShortEMA * close + (1 - kShortEMA) * lastShortEMA;
            lastLongEMA = kLongEMA * close + (1 - kLongEMA) * lastLongEMA;
            model.dif = lastShortEMA - lastLongEMA;
            model.dea = kSignalEMA * model.dif + (1 - kSignalEMA) * lastDEA;
            model.macdBar = 2.0 * (model.dif - model.dea);
        }
        lastDEA = model.dea;
    }
}
- (void)calculateKDJ {
    CGFloat k = 50.0, d = 50.0;
    for (int i = 0; i < self.kLineData.count; i++) {
        StockKLineModel *model = self.kLineData[i];
        NSInteger startIndex = MAX(0, i - 8);
        CGFloat maxHigh = -MAXFLOAT;
        CGFloat minLow = MAXFLOAT;
        for (NSInteger j = startIndex; j <= i; j++) {
            StockKLineModel *m = self.kLineData[j];
            maxHigh = MAX(maxHigh, m.high);
            minLow = MIN(minLow, m.low);
        }
        CGFloat rsv = 0;
        if (maxHigh != minLow) rsv = (model.close - minLow) / (maxHigh - minLow) * 100.0;
        k = (2.0 * k + rsv) / 3.0;
        d = (2.0 * d + k) / 3.0;
        model.K = k; model.D = d; model.J = 3.0 * k - 2.0 * d;
    }
}

#pragma mark 计算极值
- (void)calculateMinMaxPriceForStartIndex:(NSInteger)startIndex endIndex:(NSInteger)endIndex maxPrice:(CGFloat *)maxPrice minPrice:(CGFloat *)minPrice maxIndex:(NSInteger *)maxIdx minIndex:(NSInteger *)minIdx {
    *maxPrice = -MAXFLOAT; *minPrice = MAXFLOAT;
    *maxIdx = -1; *minIdx = -1;
    if (self.kLineData.count == 0) return;
    for (NSInteger i = startIndex; i <= endIndex; i++) {
        StockKLineModel *m = self.kLineData[i];
        if (m.high > *maxPrice) { *maxPrice = m.high; *maxIdx = i; }
        if (m.low < *minPrice) { *minPrice = m.low; *minIdx = i; }
        if (m.MA5 > 0) { *maxPrice = MAX(*maxPrice, m.MA5); *minPrice = MIN(*minPrice, m.MA5); }
        if (m.MA10 > 0) { *maxPrice = MAX(*maxPrice, m.MA10); *minPrice = MIN(*minPrice, m.MA10); }
        if (m.MA30 > 0) { *maxPrice = MAX(*maxPrice, m.MA30); *minPrice = MIN(*minPrice, m.MA30); }
    }
    if (*maxPrice > *minPrice) {
        CGFloat d = *maxPrice - *minPrice;
        *maxPrice += d * 0.05; *minPrice -= d * 0.05;
    }
}

#pragma mark - setupSubviews
-(void) setupSubviews {
    UIColor *bgColor = [UIColor colorWithRed:26.0/255.0 green:26.0/255.0 blue:26.0/255.0 alpha:1.0];
    
    _cardContainer = [[StockInfoCardView alloc] init];
    _cardContainer.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer setupView];
    [self.view addSubview:_cardContainer];

    _kSelectContainer = [[UIView alloc] init];
    _kSelectContainer.backgroundColor = bgColor;
    _kSelectContainer.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:_kSelectContainer];
    [self addKSelectOptions];
    
    self.kLineContainer = [self createContainerViewWithColor:bgColor];
    self.macdContainer = [self createContainerViewWithColor:bgColor];
    self.kdjContainer = [self createContainerViewWithColor:bgColor];
    self.otherContainer = [self createContainerViewWithColor:bgColor];
    
    self.kLineScrollView = [[UIScrollView alloc] init];
    self.kLineScrollView.backgroundColor = [UIColor clearColor];
    self.kLineScrollView.showsHorizontalScrollIndicator = NO;
    self.kLineScrollView.translatesAutoresizingMaskIntoConstraints = NO;
    self.kLineScrollView.delegate = self;
    [self.kLineContainer addSubview:self.kLineScrollView];
    
    [NSLayoutConstraint activateConstraints:@[
        [self.kLineScrollView.topAnchor constraintEqualToAnchor:self.kLineContainer.topAnchor],
        [self.kLineScrollView.bottomAnchor constraintEqualToAnchor:self.kLineContainer.bottomAnchor],
        [self.kLineScrollView.leadingAnchor constraintEqualToAnchor:self.kLineContainer.leadingAnchor constant:kPriceLabelAreaWidth],
        [self.kLineScrollView.trailingAnchor constraintEqualToAnchor:self.kLineContainer.trailingAnchor],
    ]];
    
    UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)];
    [self.kLineScrollView addGestureRecognizer:pinchGesture];
    
    [self setupAllLayers];
    [self setupLabels];
    
    self.maLegendLabel = [self createLegendLabel];
    [self.view addSubview:self.maLegendLabel];
    self.macdLegendLabel = [self createLegendLabel];
    [self.view addSubview:self.macdLegendLabel];
    self.kdjLegendLabel = [self createLegendLabel];
    [self.view addSubview:self.kdjLegendLabel];
    
    [NSLayoutConstraint activateConstraints:@[
        [self.maLegendLabel.leadingAnchor constraintEqualToAnchor:self.kLineContainer.leadingAnchor constant:kPriceLabelAreaWidth],
        [self.maLegendLabel.bottomAnchor constraintEqualToAnchor:self.kLineContainer.topAnchor],
        [self.macdLegendLabel.leadingAnchor constraintEqualToAnchor:self.macdContainer.leadingAnchor constant:kPriceLabelAreaWidth],
        [self.macdLegendLabel.bottomAnchor constraintEqualToAnchor:self.macdContainer.topAnchor],
        [self.kdjLegendLabel.leadingAnchor constraintEqualToAnchor:self.kdjContainer.leadingAnchor constant:kPriceLabelAreaWidth],
        [self.kdjLegendLabel.bottomAnchor constraintEqualToAnchor:self.kdjContainer.topAnchor]
    ]];
    
    self.highPriceMarkLabel = [self createMarkLabel];
    [self.kLineContainer addSubview:self.highPriceMarkLabel];
    self.lowPriceMarkLabel = [self createMarkLabel];
    [self.kLineContainer addSubview:self.lowPriceMarkLabel];
}

- (UIView *)createContainerViewWithColor:(UIColor *)color {
    UIView *uiView = [[UIView alloc] init];
    uiView.backgroundColor = color;
    uiView.translatesAutoresizingMaskIntoConstraints = NO;
    uiView.clipsToBounds = YES;
    [self.view addSubview:uiView];
    return uiView;
}

#pragma mark - setupConstraints
- (void)setupConstraints {
    [NSLayoutConstraint activateConstraints:@[
        [_cardContainer.topAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.topAnchor],
        [_cardContainer.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
        [_cardContainer.widthAnchor constraintEqualToAnchor:self.view.widthAnchor],
        [_cardContainer.heightAnchor constraintEqualToConstant:100],
        
        [_kSelectContainer.topAnchor constraintEqualToAnchor:_cardContainer.bottomAnchor constant:5],
        [_kSelectContainer.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
        [_kSelectContainer.widthAnchor constraintEqualToAnchor:self.view.widthAnchor],
        [_kSelectContainer.heightAnchor constraintEqualToConstant:40],
    ]];
    
    // 循环设置图表容器约束
    NSArray *containers = @[self.kLineContainer, self.macdContainer, self.kdjContainer, self.otherContainer];
    NSArray *heights = @[@(kKLineHeight), @(kContainerHeight), @(kContainerHeight), @(kContainerHeight)];
    
    UIView *previousView = _kSelectContainer;
    
    for (int i = 0; i < containers.count; i++) {
        UIView *container = containers[i];
        // 间距 第一个是15，MACD是30，其他是15
        CGFloat spacing = (i == 1) ? 30.0 : 15.0;
        
        [NSLayoutConstraint activateConstraints:@[
            [container.topAnchor constraintEqualToAnchor:previousView.bottomAnchor constant:spacing],
            [container.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
            [container.widthAnchor constraintEqualToAnchor:self.view.widthAnchor],
            [container.heightAnchor constraintEqualToConstant:[heights[i] floatValue]]
        ]];
        
        previousView = container;
    }
}

- (void)setupAllLayers {
    // K线
    _redCandleLayer = [self createLayerColor:[UIColor redColor] width:1.0 filled:YES];
    _greenCandleLayer = [self createLayerColor:[UIColor greenColor] width:1.0 filled:YES];
    [self.kLineContainer.layer insertSublayer:_redCandleLayer atIndex:0];
    [self.kLineContainer.layer insertSublayer:_greenCandleLayer atIndex:0];
    
    // 均线
    _ma5Layer = [self createLayerColor:[UIColor yellowColor] width:1.0 filled:NO];
    _ma10Layer = [self createLayerColor:[UIColor magentaColor] width:1.0 filled:NO];
    _ma30Layer = [self createLayerColor:[UIColor cyanColor] width:1.0 filled:NO];
    [self.kLineContainer.layer insertSublayer:_ma5Layer below:_redCandleLayer];
    [self.kLineContainer.layer insertSublayer:_ma10Layer below:_ma5Layer];
    [self.kLineContainer.layer insertSublayer:_ma30Layer below:_ma10Layer];
    
    // MACD
    _macdRedBarLayer = [self createLayerColor:[UIColor redColor] width:0 filled:YES];
    _macdGreenBarLayer = [self createLayerColor:[UIColor greenColor] width:0 filled:YES];
    _difLayer = [self createLayerColor:[UIColor whiteColor] width:1.0 filled:NO];
    _deaLayer = [self createLayerColor:[UIColor yellowColor] width:1.0 filled:NO];
    _zeroLineLayer = [self createLayerColor:[UIColor grayColor] width:0.5 filled:NO];
    [self.macdContainer.layer insertSublayer:_zeroLineLayer atIndex:0];
    [self.macdContainer.layer insertSublayer:_macdRedBarLayer above:_zeroLineLayer];
    [self.macdContainer.layer insertSublayer:_macdGreenBarLayer above:_macdRedBarLayer];
    [self.macdContainer.layer insertSublayer:_difLayer above:_macdGreenBarLayer];
    [self.macdContainer.layer insertSublayer:_deaLayer above:_difLayer];
    
    // KDJ
    _kLayer = [self createLayerColor:[UIColor whiteColor] width:1.0 filled:NO];
    _dLayer = [self createLayerColor:[UIColor yellowColor] width:1.0 filled:NO];
    _jLayer = [self createLayerColor:[UIColor magentaColor] width:1.0 filled:NO];
    [self.kdjContainer.layer insertSublayer:_kLayer atIndex:0];
    [self.kdjContainer.layer insertSublayer:_dLayer above:_kLayer];
    [self.kdjContainer.layer insertSublayer:_jLayer above:_dLayer];
}

- (CAShapeLayer *)createLayerColor:(UIColor *)color width:(CGFloat)width filled:(BOOL)fill {
    CAShapeLayer *layer = [CAShapeLayer layer];
    layer.lineWidth = width;
    layer.strokeColor = color.CGColor;
    layer.fillColor = fill ? color.CGColor : [UIColor clearColor].CGColor;
    layer.lineCap = kCALineCapSquare;
    layer.lineJoin = kCALineJoinRound;// 圆角连接，避免折线拐角出现尖锐锯齿
    return layer;
}

- (UILabel *)createLegendLabel {
    UILabel *label = [[UILabel alloc] init];
    label.font = [UIFont systemFontOfSize:10];
    label.textColor = [UIColor whiteColor];
    label.backgroundColor = [UIColor clearColor];
    label.translatesAutoresizingMaskIntoConstraints = NO;
    return label;
}

- (UILabel *)createMarkLabel {
    UILabel *label = [[UILabel alloc] init];
    label.font = [UIFont systemFontOfSize:10];
    label.textColor = [UIColor whiteColor];
    label.backgroundColor = [UIColor clearColor];
    label.hidden = YES;
    return label;
}

- (void)setupLabels {
    NSMutableArray *priceLabelArr = [NSMutableArray array];
    CGFloat chartUsableHeight = kKLineHeight - kPriceLabelPadding;
    for (NSInteger i = 0; i < 5; i++) {
        UILabel *label = [[UILabel alloc] init];
        label.text = @"--";
        label.textColor = [UIColor lightGrayColor];
        label.font = [UIFont systemFontOfSize:10];
        label.translatesAutoresizingMaskIntoConstraints = NO;
        [self.kLineContainer addSubview:label];
        [NSLayoutConstraint activateConstraints:@[
            [label.leadingAnchor constraintEqualToAnchor:self.kLineContainer.leadingAnchor constant:2],
            [label.topAnchor constraintEqualToAnchor:self.kLineContainer.topAnchor constant: (chartUsableHeight / 4 * i)]
        ]];
        [priceLabelArr addObject:label];
    }
    self.priceLabels = priceLabelArr;
    
    self.startDateLabel = [[UILabel alloc] init];
    self.startDateLabel.textColor = [UIColor lightGrayColor];
    self.startDateLabel.font = [UIFont systemFontOfSize:10];
    self.startDateLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.startDateLabel];
    
    self.endDateLabel = [[UILabel alloc] init];
    self.endDateLabel.textColor = [UIColor lightGrayColor];
    self.endDateLabel.font = [UIFont systemFontOfSize:10];
    self.endDateLabel.textAlignment = NSTextAlignmentRight;
    self.endDateLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.endDateLabel];
    
    [NSLayoutConstraint activateConstraints:@[
        [self.startDateLabel.leadingAnchor constraintEqualToAnchor:self.kLineContainer.leadingAnchor constant:kPriceLabelAreaWidth],
        [self.startDateLabel.topAnchor constraintEqualToAnchor:self.kLineContainer.bottomAnchor constant:2],
        [self.endDateLabel.trailingAnchor constraintEqualToAnchor:self.kLineContainer.trailingAnchor],
        [self.endDateLabel.topAnchor constraintEqualToAnchor:self.kLineContainer.bottomAnchor constant:2],
    ]];
}

#pragma mark - 左侧价格刻度计算
- (void)updatePriceLabelsWithMaxPrice:(CGFloat)maxPrice minPrice:(CGFloat)minPrice {
    CGFloat range = maxPrice - minPrice;
    for (NSInteger i = 0; i < 5; i++) {
        self.priceLabels[i].text = [NSString stringWithFormat:@"%.2f", maxPrice - range / 4.0 * i];
    }
}

# pragma mark - 日期计算
- (void)updateDateLabelsStartIndex:(NSInteger)startIndex endIndex:(NSInteger)endIndex {
    if (self.kLineData.count > 0) {
        if (startIndex < self.kLineData.count) self.startDateLabel.text = ((StockKLineModel *)self.kLineData[startIndex]).date;
        if (endIndex < self.kLineData.count) self.endDateLabel.text = ((StockKLineModel *)self.kLineData[endIndex]).date;
    }
}

#pragma mark - k线选择
- (void)addKSelectOptions {
    NSArray *titles = @[@"分时",@"日k", @"周k", @"月k", @"更多", @"设置"];
    UIStackView *stackView = [[UIStackView alloc] init];
    stackView.axis = UILayoutConstraintAxisHorizontal;
    stackView.distribution = UIStackViewDistributionFillEqually;
    stackView.alignment = UIStackViewAlignmentCenter;
    stackView.spacing = 5.0;
    stackView.translatesAutoresizingMaskIntoConstraints = NO;
    for (NSString *title in titles) {
        UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
        [button setTitle:title forState:UIControlStateNormal];
        button.titleLabel.font = [UIFont systemFontOfSize:14];
        [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [stackView addArrangedSubview:button];
    }
    [_kSelectContainer addSubview:stackView];
    [NSLayoutConstraint activateConstraints:@[
        [stackView.leadingAnchor constraintEqualToAnchor:_kSelectContainer.leadingAnchor constant:10],
        [stackView.trailingAnchor constraintEqualToAnchor:_kSelectContainer.trailingAnchor constant:-10],
        [stackView.topAnchor constraintEqualToAnchor:_kSelectContainer.topAnchor constant:15],
        [stackView.bottomAnchor constraintEqualToAnchor:_kSelectContainer.bottomAnchor constant:-15]
    ]];
}

#pragma mark - 十字星
- (void)setupDojiViews {
    // 竖线
    self.crossVerticalLine = [[UIView alloc] init];
    self.crossVerticalLine.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.8];
    self.crossVerticalLine.hidden = YES;
    self.crossVerticalLine.userInteractionEnabled = NO; // 不挡手势
    [self.view addSubview:self.crossVerticalLine];
    
    // 横线
    self.crossHorizontalLine = [[UIView alloc] init];
    self.crossHorizontalLine.backgroundColor = [[UIColor whiteColor] colorWithAlphaComponent:0.8];
    self.crossHorizontalLine.hidden = YES;
    self.crossHorizontalLine.userInteractionEnabled = NO;
    [self.view addSubview:self.crossHorizontalLine];
    
    // 价格
    self.crossPriceLabel = [[UILabel alloc] init];
    self.crossPriceLabel.backgroundColor = [UIColor systemBlueColor];
    self.crossPriceLabel.textColor = [UIColor whiteColor];
    self.crossPriceLabel.font = [UIFont systemFontOfSize:9];
    self.crossPriceLabel.textAlignment = NSTextAlignmentCenter;
    self.crossPriceLabel.clipsToBounds = YES;
    self.crossPriceLabel.layer.cornerRadius = 2.0;
    self.crossPriceLabel.hidden = YES;
    [self.view addSubview:self.crossPriceLabel];
    
    // 日期
    self.crossDateLabel = [[UILabel alloc] init];
    self.crossDateLabel.backgroundColor = [UIColor systemBlueColor];
    self.crossDateLabel.textColor = [UIColor whiteColor];
    self.crossDateLabel.font = [UIFont systemFontOfSize:9];
    self.crossDateLabel.textAlignment = NSTextAlignmentCenter;// 居中对齐
    //NSTextAlignmentJustified 两端对齐
    self.crossDateLabel.clipsToBounds = YES;
    self.crossDateLabel.layer.cornerRadius = 2.0;
    self.crossDateLabel.hidden = YES;
    [self.view addSubview:self.crossDateLabel];
    
    NSArray *targetViews = @[self.kLineScrollView, self.macdContainer, self.kdjContainer];
    for (UIView *view in targetViews) {
        // 必须在循环里创建新的手势对象，因为一个手势只能绑定一个View
        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
        longPress.minimumPressDuration = 0.3; // 设置触发时间
        [view addGestureRecognizer:longPress];
    }
}

- (void)handleLongPress:(UILongPressGestureRecognizer *)gesture {
    CGPoint touchPoint = [gesture locationInView:self.kLineScrollView];
    CGPoint touchPointInView = [gesture locationInView:self.view];
    
    CGFloat offsetX = self.kLineScrollView.contentOffset.x;
    
    NSInteger index = floor(touchPoint.x / kLineUnitWidth);// 向下取整
    if (index < 0) index = 0;
    if (index >= self.kLineData.count) index = self.kLineData.count - 1;
    
    if (gesture.state == UIGestureRecognizerStateBegan || gesture.state == UIGestureRecognizerStateChanged) {// 手势开始/移动
        self.isLongPressing = YES;
        self.crossVerticalLine.hidden = NO;
        self.crossHorizontalLine.hidden = NO;
        self.crossPriceLabel.hidden = NO;
        self.crossDateLabel.hidden = NO;// 显示十字星
        
        // 更新竖线位置
        CGFloat xCenterInScroll = kLineUnitWidth * 0.5 + kLineUnitWidth * index;
        //滚动视图x坐标 - 滚动偏移量 + 价格标签宽度
        CGFloat xCenterInView = xCenterInScroll - offsetX + kPriceLabelAreaWidth;
        
        // 不要越界
        if (xCenterInView < kPriceLabelAreaWidth || xCenterInView > self.view.bounds.size.width) return;
        
        CGFloat topY = self.kLineContainer.frame.origin.y;// k线容器在主视图的顶部y
        CGFloat bottomY = CGRectGetMaxY(self.otherContainer.frame);// 空容器的底部
        self.crossVerticalLine.frame = CGRectMake(xCenterInView, topY, 0.5, bottomY - topY);
        
        CGFloat displayValue = 0.0;
        BOOL isTouchValid = NO; // 用于标记是否摸到了有效的图表区域
        
        // 判断手指在哪个容器里
        if (CGRectContainsPoint(self.kLineContainer.frame, touchPointInView)) {// CGRectContainsPoint(矩形区域, 点) 布尔：
            isTouchValid = YES;
            CGFloat relativeY = touchPointInView.y - self.kLineContainer.frame.origin.y;
            CGFloat height = self.kLineContainer.frame.size.height;
            displayValue = self.currentMaxPrice - (relativeY / height) * (self.currentMaxPrice - self.currentMinPrice);
            
        } else if (CGRectContainsPoint(self.macdContainer.frame, touchPointInView)) {
            isTouchValid = YES;
            CGFloat relativeY = touchPointInView.y - self.macdContainer.frame.origin.y;
            CGFloat height = self.macdContainer.frame.size.height;
            displayValue = self.macdMaxValue - (relativeY / height) * (self.macdMaxValue - self.macdMinValue);
            
        } else if (CGRectContainsPoint(self.kdjContainer.frame, touchPointInView)) {
            isTouchValid = YES;
            CGFloat relativeY = touchPointInView.y - self.kdjContainer.frame.origin.y;
            CGFloat height = self.kdjContainer.frame.size.height;
            displayValue = self.kdjMaxValue - (relativeY / height) * (self.kdjMaxValue - self.kdjMinValue);
        }
        
        // 只有触摸在图表内才更新横线
        if (isTouchValid) {
            self.crossHorizontalLine.frame = CGRectMake(kPriceLabelAreaWidth, touchPointInView.y, self.view.bounds.size.width - kPriceLabelAreaWidth, 0.5);
            
            self.crossPriceLabel.text = [NSString stringWithFormat:@" %.2f ", displayValue];
            [self.crossPriceLabel sizeToFit];
            self.crossPriceLabel.center = CGPointMake(kPriceLabelAreaWidth / 2.0, touchPointInView.y);
        }
        
        StockKLineModel *model = self.kLineData[index];
        self.crossDateLabel.text = [NSString stringWithFormat:@" %@ ", model.date];
        [self.crossDateLabel sizeToFit];
        CGFloat dateLabelY = CGRectGetMaxY(self.kLineContainer.frame);
        self.crossDateLabel.center = CGPointMake(xCenterInView, dateLabelY);
        
        [self updateLegendsWithIndex:index];
        
    } else if (gesture.state == UIGestureRecognizerStateEnded || gesture.state == UIGestureRecognizerStateCancelled) {// 结束/取消
        self.isLongPressing = NO;
        self.crossVerticalLine.hidden = YES;
        self.crossHorizontalLine.hidden = YES;
        self.crossPriceLabel.hidden = YES;
        self.crossDateLabel.hidden = YES;
        
        [self drawAllCharts];
    }
}


@end