OCHomilyChart/Modules/Main/CommonTabBar.m

//
//  CommonTabBar.m
//  HC
//
//  Created by huilinLi on 2025/11/25.
//

#import "CommonTabBar.h"

@interface CommonTabBar ()
@property (nonatomic, strong) NSArray<UIButton *> *tabButtons;
@end

@implementation CommonTabBar

- (instancetype)initWithTabItems:(NSArray<NSDictionary *> *)tabItems {
    self = [super init];
    if (self) {
        self.backgroundColor = [UIColor blackColor];
        self.translatesAutoresizingMaskIntoConstraints = NO;
        [self setupTabButtonsWithItems:tabItems];
    }
    return self;
}

- (void)setupTabButtonsWithItems:(NSArray<NSDictionary *> *)tabItems {
    NSMutableArray<UIButton *> *buttons = [NSMutableArray array];
    
    for (NSInteger i = 0; i < tabItems.count; i++) {
        NSDictionary *item = tabItems[i];
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
        
        UIButtonConfiguration *config = [UIButtonConfiguration plainButtonConfiguration];
        config.image = [UIImage systemImageNamed:item[@"icon"] ?: @""];
        config.title = item[@"title"];
        config.imagePlacement = NSDirectionalRectEdgeTop;
        config.imagePadding = 5;
        btn.configuration = config;
        
        BOOL selected = [item[@"selected"] boolValue];
        btn.tintColor = selected ? [UIColor blueColor] : [UIColor whiteColor];
        btn.titleLabel.font = [UIFont systemFontOfSize:10];
        btn.tag = i;
        
        [btn addTarget:self action:@selector(tabButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
        
        [self addSubview:btn];
        [buttons addObject:btn];
    }
    
    self.tabButtons = buttons;
    [self setupTabButtonConstraints];
}

- (void)setupTabButtonConstraints {
    for (NSInteger i = 0; i < self.tabButtons.count; i++) {
        UIButton *btn = self.tabButtons[i];
        btn.translatesAutoresizingMaskIntoConstraints = NO;
        
        [NSLayoutConstraint activateConstraints:@[
            [btn.widthAnchor constraintEqualToAnchor:self.widthAnchor multiplier:1.0/self.tabButtons.count],
            [btn.heightAnchor constraintEqualToAnchor:self.heightAnchor],
            [btn.centerYAnchor constraintEqualToAnchor:self.centerYAnchor],
            
            (i == 0) ? [btn.leadingAnchor constraintEqualToAnchor:self.leadingAnchor] :
                       [btn.leadingAnchor constraintEqualToAnchor:self.tabButtons[i-1].trailingAnchor],
        ]];
    }
    
    // TabBar自身高度
    [self.heightAnchor constraintEqualToConstant:60].active = YES;
}

- (void)tabButtonTapped:(UIButton *)sender {
    self.selectedIndex = sender.tag;
    
    for (UIButton *btn in self.tabButtons) {
        btn.tintColor = (btn.tag == sender.tag) ? [UIColor blueColor] : [UIColor whiteColor];
    }
    
    if ([self.delegate respondsToSelector:@selector(tabBarDidSelectIndex:)]) {
        [self.delegate tabBarDidSelectIndex:sender.tag];
    }
}

// 外部设置选中索引时更新样式
- (void)setSelectedIndex:(NSInteger)selectedIndex {
    _selectedIndex = selectedIndex;
    for (UIButton *btn in self.tabButtons) {
        btn.tintColor = (btn.tag == selectedIndex) ? [UIColor blueColor] : [UIColor whiteColor];
    }
}

@end