OCHomilyChart/HC/ChartViewController.m

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

#import "ChartViewController.h"
#import "StockKLineModel.h"

@interface ChartViewController ()

// 上方卡片容器
@property (nonatomic, strong) UIView *cardContainer;
// k线选择项容器
@property (nonatomic, strong) UIView *kSelectContainer;
// K线图表容器
@property (nonatomic, strong) UIView *kLineContainer;
// K线图表滚动视图
@property (nonatomic, strong) UIScrollView *kLineScrollView;

// K线数据
@property (nonatomic, strong) NSArray *kLineData;
// 价格刻度标签
@property (nonatomic, strong) NSArray *priceLabels;
// 日期刻度标签
@property (nonatomic, strong) NSArray *dateLabels;

// 默认展示的K线数量
@property (nonatomic, assign) NSInteger visibleKLineCount;

@end

@implementation ChartViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor blackColor];
    
    self.visibleKLineCount = 40;
    
    [self generateMockData];
    [self setupSubviews];
    [self setupConstraints];
    
    dispatch_async(dispatch_get_main_queue(), ^{
        [self drawKLineChart];
        
        if (self.kLineScrollView.contentSize.width > self.kLineScrollView.bounds.size.width) {
            CGPoint offset = CGPointMake(self.kLineScrollView.contentSize.width - self.kLineScrollView.bounds.size.width, 0);
            [self.kLineScrollView setContentOffset:offset animated:NO];
        }
    });
}

#pragma mark - UI Setup
-(void) setupSubviews{
    // 卡片容器
    _cardContainer = [[UIView alloc] init];
    _cardContainer.backgroundColor = [UIColor colorWithRed:26.0/255.0
                                                     green:26.0/255.0
                                                      blue:2.0/255.0
                                                     alpha:1.0];
    _cardContainer.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:_cardContainer];
    
    UILabel *cardLabel1 = [[UILabel alloc] init];
    cardLabel1.text = @"1617.060";
    cardLabel1.textColor = [UIColor redColor];
    cardLabel1.font = [UIFont systemFontOfSize:15];
    cardLabel1.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabel1];
    
    UILabel *cardLabel2 = [[UILabel alloc] init];
    cardLabel2.text = @"-7.470";
    cardLabel2.textColor = [UIColor redColor];
    cardLabel2.font = [UIFont systemFontOfSize:8];
    cardLabel2.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabel2];
    
    UILabel *cardLabel3 = [[UILabel alloc] init];
    cardLabel3.text = @"-0.461%";
    cardLabel3.textColor = [UIColor redColor];
    cardLabel3.font = [UIFont systemFontOfSize:8];
    cardLabel3.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabel3];
    
    [NSLayoutConstraint activateConstraints:@[
        [cardLabel1.topAnchor constraintEqualToAnchor:_cardContainer.topAnchor constant:25],
        [cardLabel1.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:10],
        
        [cardLabel2.topAnchor constraintEqualToAnchor:_cardContainer.topAnchor constant:50],
        [cardLabel2.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant: 8],
        
        [cardLabel3.topAnchor constraintEqualToAnchor:_cardContainer.topAnchor constant:50],
        [cardLabel3.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant: 45]
    ]];
    
    UILabel *cardLabelHeight = [[UILabel alloc] init];
    cardLabelHeight.text = @"高";
    cardLabelHeight.textColor = [UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:1];
    cardLabelHeight.font = [UIFont systemFontOfSize:15];
    cardLabelHeight.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabelHeight];
    
    UILabel *cardLabelStart = [[UILabel alloc] init];
    cardLabelStart.text = @"开";
    cardLabelStart.textColor = [UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:1];
    cardLabelStart.font = [UIFont systemFontOfSize:15];
    cardLabelStart.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabelStart];
    
    UILabel *cardLabelVolume = [[UILabel alloc] init];
    cardLabelVolume.text = @"量";
    cardLabelVolume.textColor = [UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:1];
    cardLabelVolume.font = [UIFont systemFontOfSize:15];
    cardLabelVolume.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabelVolume];
    
    UILabel *cardLabelLow = [[UILabel alloc] init];
    cardLabelLow.text = @"低";
    cardLabelLow.textColor = [UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:1];
    cardLabelLow.font = [UIFont systemFontOfSize:15];
    cardLabelLow.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabelLow];
    
    UILabel *cardLabelChange = [[UILabel alloc] init];
    cardLabelChange.text = @"换";
    cardLabelChange.textColor = [UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:1];
    cardLabelChange.font = [UIFont systemFontOfSize:15];
    cardLabelChange.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabelChange];
    
    UILabel *cardLabelQuota = [[UILabel alloc] init];
    cardLabelQuota.text = @"额";
    cardLabelQuota.textColor = [UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:1];
    cardLabelQuota.font = [UIFont systemFontOfSize:15];
    cardLabelQuota.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardLabelQuota];
    
    UILabel *cardNumHeight = [[UILabel alloc] init];
    cardNumHeight.text = @"1617.260";
    cardNumHeight.textColor = [UIColor redColor];
    cardNumHeight.font = [UIFont systemFontOfSize:12];
    cardNumHeight.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardNumHeight];
    
    UILabel *cardNumStart = [[UILabel alloc] init];
    cardNumStart.text = @"1616.750";
    cardNumStart.textColor = [UIColor redColor];
    cardNumStart.font = [UIFont systemFontOfSize:12];
    cardNumStart.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardNumStart];
    
    UILabel *cardNumVolume = [[UILabel alloc] init];
    cardNumVolume.text = @"1.511亿";
    cardNumVolume.textColor = [UIColor whiteColor];
    cardNumVolume.font = [UIFont systemFontOfSize:12];
    cardNumVolume.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardNumVolume];
    
    UILabel *cardNumLow = [[UILabel alloc] init];
    cardNumLow.text = @"1608.850";
    cardNumLow.textColor = [UIColor whiteColor];
    cardNumLow.font = [UIFont systemFontOfSize:12];
    cardNumLow.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardNumLow];
    
    UILabel *cardNumChange = [[UILabel alloc] init];
    cardNumChange.text = @"--";
    cardNumChange.textColor = [UIColor whiteColor];
    cardNumChange.font = [UIFont systemFontOfSize:12];
    cardNumChange.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardNumChange];
    
    UILabel *cardNumQuota = [[UILabel alloc] init];
    cardNumQuota.text = @"--";
    cardNumQuota.textColor = [UIColor whiteColor];
    cardNumQuota.font = [UIFont systemFontOfSize:12];
    cardNumQuota.translatesAutoresizingMaskIntoConstraints = NO;
    [_cardContainer addSubview:cardNumQuota];
    
    [NSLayoutConstraint activateConstraints:@[
        [cardLabelHeight.bottomAnchor constraintEqualToAnchor:_cardContainer.bottomAnchor constant:-75],
        
        [cardLabelStart.bottomAnchor constraintEqualToAnchor:cardLabelHeight.bottomAnchor],
        
        [cardLabelVolume.bottomAnchor constraintEqualToAnchor:cardLabelHeight.bottomAnchor],
        
        [cardLabelLow.topAnchor constraintEqualToAnchor:_cardContainer.bottomAnchor constant:-50],
        [cardLabelLow.leadingAnchor constraintEqualToAnchor:cardLabelHeight.leadingAnchor],
        
        [cardLabelChange.topAnchor constraintEqualToAnchor:_cardContainer.bottomAnchor constant:-50],
        [cardLabelChange.leadingAnchor constraintEqualToAnchor:cardLabelStart.leadingAnchor],
        
        [cardLabelQuota.topAnchor constraintEqualToAnchor:_cardContainer.bottomAnchor constant:-50],
        [cardLabelQuota.leadingAnchor constraintEqualToAnchor:cardLabelVolume.leadingAnchor],
        
        [cardNumHeight.bottomAnchor constraintEqualToAnchor:_cardContainer.topAnchor constant:45],
        [cardNumHeight.leadingAnchor constraintEqualToAnchor:cardLabelHeight.leadingAnchor],
        
        [cardNumStart.bottomAnchor constraintEqualToAnchor:cardNumHeight.bottomAnchor],
        [cardNumStart.leadingAnchor constraintEqualToAnchor:cardLabelStart.leadingAnchor],
        
        [cardNumVolume.bottomAnchor constraintEqualToAnchor:cardNumHeight.bottomAnchor],
        [cardNumVolume.leadingAnchor constraintEqualToAnchor:cardLabelVolume.leadingAnchor],
        
        [cardNumLow.bottomAnchor constraintEqualToAnchor:_cardContainer.bottomAnchor constant:-10],
        [cardNumLow.leadingAnchor constraintEqualToAnchor:cardLabelLow.leadingAnchor],
        
        [cardNumChange.bottomAnchor constraintEqualToAnchor:cardNumLow.bottomAnchor],
        [cardNumChange.leadingAnchor constraintEqualToAnchor:cardLabelChange.leadingAnchor],
        
        [cardNumQuota.bottomAnchor constraintEqualToAnchor:cardNumLow.bottomAnchor],
        [cardNumQuota.leadingAnchor constraintEqualToAnchor:cardLabelVolume.leadingAnchor]
    ]];
    
    [NSLayoutConstraint constraintWithItem:cardLabelHeight
                                 attribute:NSLayoutAttributeLeading
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:_cardContainer
                                 attribute:NSLayoutAttributeTrailing
                                multiplier:0.25
                                  constant:0].active = YES;
    [NSLayoutConstraint constraintWithItem:cardLabelStart
                                 attribute:NSLayoutAttributeLeading
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:_cardContainer
                                 attribute:NSLayoutAttributeTrailing
                                multiplier:0.5
                                  constant:0].active = YES;
    [NSLayoutConstraint constraintWithItem:cardLabelVolume
                                 attribute:NSLayoutAttributeLeading
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:_cardContainer
                                 attribute:NSLayoutAttributeTrailing
                                multiplier:0.75
                                  constant:0].active = YES;
    
    // K线选择项容器
    _kSelectContainer = [[UIView alloc] init];
    _kSelectContainer.backgroundColor = [UIColor colorWithRed:26.0/255.0
                                                        green:26.0/255.0
                                                         blue:2.0/255.0
                                                        alpha:1.0];
    _kSelectContainer.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:_kSelectContainer];
    [self addKSelectOptions];
    
    // K线图表容器
    self.kLineContainer = [[UIView alloc] init];
    self.kLineContainer.backgroundColor = [UIColor colorWithRed:26.0/255.0 green:26.0/255.0 blue:26.0/255.0 alpha:1.0];
    self.kLineContainer.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.kLineContainer];
    
    // K线图表滚动视图
    self.kLineScrollView = [[UIScrollView alloc] init];
    self.kLineScrollView.backgroundColor = [UIColor clearColor];
    self.kLineScrollView.showsHorizontalScrollIndicator = NO;
    self.kLineScrollView.userInteractionEnabled = YES;
    self.kLineScrollView.translatesAutoresizingMaskIntoConstraints = NO;
    
    [self.kLineContainer addSubview:self.kLineScrollView];
    
    CGFloat priceLabelAreaWidth = 50.0;
    
    // 滚动视图的约束
    [NSLayoutConstraint activateConstraints:@[
        [self.kLineScrollView.topAnchor constraintEqualToAnchor:self.kLineContainer.topAnchor],
        [self.kLineScrollView.bottomAnchor constraintEqualToAnchor:self.kLineContainer.bottomAnchor],
        [self.kLineScrollView.leadingAnchor constraintEqualToAnchor:self.kLineContainer.leadingAnchor constant:priceLabelAreaWidth],
        [self.kLineScrollView.trailingAnchor constraintEqualToAnchor:self.kLineContainer.trailingAnchor],
        [self.kLineScrollView.heightAnchor constraintEqualToAnchor:self.kLineContainer.heightAnchor]
    ]];
    
    // 边框
    UIView *borderView = [[UIView alloc] init];
    borderView.backgroundColor = [UIColor clearColor];
    borderView.layer.borderWidth = 1;
    borderView.layer.borderColor = [[UIColor colorWithRed:0.4 green:0.4 blue:0.4 alpha:1.0] CGColor];
    borderView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.kLineContainer addSubview:borderView];
    [NSLayoutConstraint activateConstraints:@[
        [borderView.leadingAnchor constraintEqualToAnchor:self.kLineContainer.leadingAnchor],
        [borderView.trailingAnchor constraintEqualToAnchor:self.kLineContainer.trailingAnchor],
        [borderView.topAnchor constraintEqualToAnchor:self.kLineContainer.topAnchor],
        [borderView.bottomAnchor constraintEqualToAnchor:self.kLineContainer.bottomAnchor]
    ]];
    
    // 动态计算模型数据的价格区间
    CGFloat maxPrice = 0;
    CGFloat minPrice = CGFLOAT_MAX;
    for (id item in self.kLineData) {
        if ([item isKindOfClass:[StockKLineModel class]]) {
            StockKLineModel *model = (StockKLineModel *)item;
            maxPrice = MAX(maxPrice, model.high);
            minPrice = MIN(minPrice, model.low);
        } else if ([item isKindOfClass:[NSDictionary class]]) {
            NSDictionary *dict = (NSDictionary *)item;
            maxPrice = MAX(maxPrice, [dict[@"high"] floatValue]);
            minPrice = MIN(minPrice, [dict[@"low"] floatValue]);
        }
    }
    maxPrice = maxPrice + (maxPrice - minPrice) * 0.1;
    minPrice = minPrice - (maxPrice - minPrice) * 0.1;
    
    // 价格刻度
    NSMutableArray *priceLabelArr = [NSMutableArray array];
    for (NSInteger i = 0; i < 5; i++) {
        CGFloat price = maxPrice - (maxPrice - minPrice) / 4 * i;
        UILabel *label = [[UILabel alloc] init];
        label.text = [NSString stringWithFormat:@"%.1f", price];
        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:5],
            [label.centerYAnchor constraintEqualToAnchor:self.kLineContainer.centerYAnchor constant:-80 + 40 * i]
        ]];
        [priceLabelArr addObject:label];
    }
    self.priceLabels = priceLabelArr;
    
    self.dateLabels = @[];
}

- (void)addKSelectOptions {
    NSArray *titles = @[@"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];
        
        if ([title isEqualToString:@"日k"]) {
            [button setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];
            button.layer.borderColor = [[UIColor yellowColor] CGColor];
            button.layer.borderWidth = 1.0;
        } else {
            [button setTitleColor:[UIColor lightGrayColor] forState:UIControlStateNormal];
            button.layer.borderWidth = 0;
        }
        
        button.layer.cornerRadius = 3.0;
        button.clipsToBounds = YES;
        
        [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:5],
        [stackView.bottomAnchor constraintEqualToAnchor:_kSelectContainer.bottomAnchor constant:-5]
    ]];
}

#pragma mark - Constraints
- (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],
        
        [self.kLineContainer.topAnchor constraintEqualToAnchor:self.kSelectContainer.bottomAnchor constant:5],
        [self.kLineContainer.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
        [self.kLineContainer.widthAnchor constraintEqualToAnchor:self.view.widthAnchor],
        [self.kLineContainer.heightAnchor constraintEqualToConstant:200]
    ]];
}

#pragma mark - KLine Drawing
- (void)drawKLineChart {
    // 移除旧的 K 线
    for (UIView *subview in self.kLineScrollView.subviews) {
        if (![subview isKindOfClass:[UILabel class]]) {
            [subview removeFromSuperview];
        }
    }
    
    CGFloat chartHeight = self.kLineContainer.bounds.size.height;
    if (chartHeight == 0) {
        chartHeight = 200;
    }
    
    // K线宽度计算
    CGFloat kLineUnitWidth = 5.0;
    CGFloat kLineRatio = 0.8;
    CGFloat kLineWidth = kLineUnitWidth * kLineRatio;
    CGFloat space = kLineUnitWidth * (1.0 - kLineRatio);
    CGFloat totalChartWidth = kLineUnitWidth * self.kLineData.count;
    
    // 设置contentSize
    self.kLineScrollView.contentSize = CGSizeMake(totalChartWidth, chartHeight);
    
    // 动态计算价格区间
    CGFloat maxPrice = 0;
    CGFloat minPrice = CGFLOAT_MAX;
    for (id item in self.kLineData) {
        if ([item isKindOfClass:[StockKLineModel class]]) {
            StockKLineModel *model = (StockKLineModel *)item;
            maxPrice = MAX(maxPrice, model.high);
            minPrice = MIN(minPrice, model.low);
        } else if ([item isKindOfClass:[NSDictionary class]]) {
            NSDictionary *dict = (NSDictionary *)item;
            maxPrice = MAX(maxPrice, [dict[@"high"] floatValue]);
            minPrice = MIN(minPrice, [dict[@"low"] floatValue]);
        }
    }
    maxPrice = maxPrice + (maxPrice - minPrice) * 0.1;
    minPrice = minPrice - (maxPrice - minPrice) * 0.1;
    CGFloat priceRange = maxPrice - minPrice;
    
    // 绘制K线
    for (NSInteger i = 0; i < self.kLineData.count; i++) {
        CGFloat open = 0, high = 0, low = 0, close = 0;
        
        if ([self.kLineData[i] isKindOfClass:[StockKLineModel class]]) {
            StockKLineModel *model = (StockKLineModel *)self.kLineData[i];
            open = model.open;
            high = model.high;
            low = model.low;
            close = model.close;
        } else if ([self.kLineData[i] isKindOfClass:[NSDictionary class]]) {
            NSDictionary *dict = (NSDictionary *)self.kLineData[i];
            open = [dict[@"open"] floatValue];
            high = [dict[@"high"] floatValue];
            low = [dict[@"low"] floatValue];
            close = [dict[@"close"] floatValue];
        }
        
        // 坐标转换
        CGFloat yOpen = chartHeight * (maxPrice - open) / priceRange;
        CGFloat yHigh = chartHeight * (maxPrice - high) / priceRange;
        CGFloat yLow = chartHeight * (maxPrice - low) / priceRange;
        CGFloat yClose = chartHeight * (maxPrice - close) / priceRange;
        
        // 计算X坐标
        CGFloat xPosition = space/2 + kLineUnitWidth * i;
        
        // 绘制K线实体
        UIView *bodyView = [[UIView alloc] init];
        bodyView.backgroundColor = (close >= open) ? [UIColor greenColor] : [UIColor redColor];
        bodyView.frame = CGRectMake(
            xPosition,
            MIN(yOpen, yClose),
            kLineWidth,
            MAX(1.0, fabs(yClose - yOpen))
        );
        [self.kLineScrollView addSubview:bodyView];
        
        // 绘制影线
        UIView *shadowView = [[UIView alloc] init];
        shadowView.backgroundColor = bodyView.backgroundColor;
        shadowView.frame = CGRectMake(
            bodyView.center.x - 0.5,
            yHigh,
            1,
            yLow - yHigh
        );
        [self.kLineScrollView addSubview:shadowView];
    }
    
    // 日期刻度
    for (UILabel *label in self.dateLabels) {
        [label removeFromSuperview];
    }
    
    NSMutableArray *dateLabelArr = [NSMutableArray array];
    NSInteger dateInterval = 10;
    
    for (NSInteger i = 0; i < self.kLineData.count; i += dateInterval) {
        NSString *dateStr = @"";
        if ([self.kLineData[i] isKindOfClass:[StockKLineModel class]]) {
            StockKLineModel *model = (StockKLineModel *)self.kLineData[i];
            dateStr = model.date;
        } else if ([self.kLineData[i] isKindOfClass:[NSDictionary class]]) {
            NSDictionary *dict = (NSDictionary *)self.kLineData[i];
            dateStr = dict[@"date"];
        }
        UILabel *label = [[UILabel alloc] init];
        label.text = dateStr;
        label.textColor = [UIColor lightGrayColor];
        label.font = [UIFont systemFontOfSize:10];
        label.translatesAutoresizingMaskIntoConstraints = YES;
        
        CGFloat xCenter = kLineUnitWidth * (i + 0.5);
        [label sizeToFit];
        
        label.frame = CGRectMake(
            xCenter - label.bounds.size.width / 2,
            chartHeight - 15,
            label.bounds.size.width,
            label.bounds.size.height
        );
        
        [self.kLineScrollView addSubview:label];
        [dateLabelArr addObject:label];
    }
    self.dateLabels = dateLabelArr;
    
    NSLog(@"ScrollView Bounds Width: %f", self.kLineScrollView.bounds.size.width);
    NSLog(@"Content Size Width: %f", self.kLineScrollView.contentSize.width);
    
    if (self.kLineScrollView.contentSize.width <= self.kLineScrollView.bounds.size.width) {
        NSLog(@"⚠️ 警告：ContentSize 不够大，无法滑动。");
    }
}

#pragma mark - Mock Data
- (void) setupData{
    self.kLineData = @[
        @{@"date":@"2025/11/18", @"open":@1620.0, @"high":@1643.0, @"low":@1605.0, @"close":@1630.0, @"volume":@2.5},
        @{@"date":@"2025/11/19", @"open":@1630.0, @"high":@1635.0, @"low":@1615.0, @"close":@1620.0, @"volume":@2.2},
        @{@"date":@"2025/11/20", @"open":@1620.0, @"high":@1628.0, @"low":@1608.0, @"close":@1615.0, @"volume":@1.8},
        @{@"date":@"2025/11/21", @"open":@1615.0, @"high":@1625.0, @"low":@1610.0, @"close":@1622.0, @"volume":@2.0},
        @{@"date":@"2025/11/22", @"open":@1622.0, @"high":@1630.0, @"low":@1618.0, @"close":@1625.0, @"volume":@2.3},
        @{@"date":@"2025/11/25", @"open":@1625.0, @"high":@1632.0, @"low":@1620.0, @"close":@1628.0, @"volume":@1.9},
        @{@"date":@"2025/11/26", @"open":@1628.0, @"high":@1635.0, @"low":@1622.0, @"close":@1630.0, @"volume":@2.1},
        @{@"date":@"2025/11/27", @"open":@1630.0, @"high":@1638.0, @"low":@1625.0, @"close":@1628.0, @"volume":@2.4},
        @{@"date":@"2025/11/28", @"open":@1628.0, @"high":@1632.0, @"low":@1609.0, @"close":@1610.0, @"volume":@2.6},
        @{@"date":@"2025/11/29", @"open":@1610.0, @"high":@1620.0, @"low":@1608.0, @"close":@1615.0, @"volume":@1.7}
    ];
}

- (void)generateMockData {
    NSMutableArray *arr = [NSMutableArray array];
    CGFloat lastClose = 100.0;
    NSLog(@"生成模拟数据中。。。");
    
    // 生成200条数据（减少数量，避免contentSize过大）
    for (int i = 0; i < 200; i++) {
        StockKLineModel *model = [[StockKLineModel alloc] init];
        
        NSDate *date = [NSDate dateWithTimeIntervalSinceNow:-(200 - i) * 24 * 3600];
        NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
        [fmt setDateFormat:@"MM-dd"];
        model.date = [fmt stringFromDate:date];
        
        // 价格生成逻辑
        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;
        
        // 成交量生成逻辑
        CGFloat baseVolume = 1000000.0;
        CGFloat randomVolFactor = (arc4random() % 200) / 100.0 + 0.5;
        
        if (fabs(model.close - model.open) / model.open > 0.03) {
            randomVolFactor *= 1.5;
        }
        
        model.volume = baseVolume * randomVolFactor;
        
        if (model.low < 0) model.low = 0.01;
        
        [arr addObject:model];
        
        lastClose = model.close;
    }
    
    NSLog(@"生成模拟数据完毕，共%ld条", arr.count);
    
    self.kLineData = arr;
}

@end