iOS TabBar 轮子

#import "MainTabBarController.h"
#import "AHomeController.h"
#import "BHomeController.h"
#import "CHomeController.h"
#import "DHomeController.h"
#import "CYLPlusButtonSubclass.h"

@interface MainTabBarController ()<UITabBarControllerDelegate>

@end

@implementation MainTabBarController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
}

- (instancetype)initTabBar{
    
    // 中间异形按钮
    [CYLPlusButtonSubclass registerPlusButton];
    
    /**
     * 以下两行代码目的在于手动设置让TabBarItem只显示图标，不显示文字，并让图标垂直居中。
     * 等 效于在 `-tabBarItemsAttributesForController` 方法中不传 `CYLTabBarItemTitle` 字段。
     * 更推荐后一种做法。
     */
    UIEdgeInsets imageInsets = UIEdgeInsetsZero;//UIEdgeInsetsMake(4.5, 0, -4.5, 0);
    UIOffset titlePositionAdjustment = UIOffsetMake(0, -3.5);
    if (self = [super initWithViewControllers:[self viewControllersForTabBar]
                        tabBarItemsAttributes:[self tabBarItemsAttributesForTabBar]
                                  imageInsets:imageInsets
                      titlePositionAdjustment:titlePositionAdjustment
                                      context:@""
                ]) {
        [self customizeTabBarAppearanceWithTitlePositionAdjustment:titlePositionAdjustment];
        self.delegate = self;
        self.navigationController.navigationBar.hidden = YES;
    }
    return self;
}

- (NSArray *)viewControllersForTabBar {
    AHomeController *firstViewController = [[AHomeController alloc] init];
    firstViewController.title = @"首页";
    UIViewController *firstNavigationController = [[CYLBaseNavigationController alloc]
                                                   initWithRootViewController:firstViewController];
     
    BHomeController *secondViewController = [[BHomeController alloc] init];
    UIViewController *secondNavigationController = [[CYLBaseNavigationController alloc]
                                                    initWithRootViewController:secondViewController];

    CHomeController *thirdViewController = [[CHomeController alloc] init];
    UIViewController *thirdNavigationController = [[CYLBaseNavigationController alloc]
                                                   initWithRootViewController:thirdViewController];
    
    DHomeController *fourthViewController = [[DHomeController alloc] init];
    UIViewController *fourthNavigationController = [[CYLBaseNavigationController alloc]
                                                    initWithRootViewController:fourthViewController];
    NSArray *viewControllers = @[
                                 firstNavigationController,
                                 secondNavigationController,
                                 thirdNavigationController,
                                 fourthNavigationController
                                 ];
    return viewControllers;
}

- (NSArray *)tabBarItemsAttributesForTabBar {
    // lottie动画的json文件来自于NorthSea, respect!
    NSDictionary *firstTabBarItemsAttributes = @{
                                                 CYLTabBarItemTitle : @"首页",
                                                 CYLTabBarItemImage : [UIImage imageNamed:@"home_normal"],
                                                 CYLTabBarItemSelectedImage : @"home_highlight",
                                                 CYLTabBarItemTitlePositionAdjustment: [NSValue valueWithUIOffset:UIOffsetMake(0, 1)],//设置文本与图片的Position
                                                 };

    NSDictionary *secondTabBarItemsAttributes = @{
                                                  CYLTabBarItemTitle : @"鱼塘",
                                                  CYLTabBarItemImage : [UIImage imageNamed:@"fishpond_normal"],
                                                  CYLTabBarItemSelectedImage : @"fishpond_highlight",
                                                  CYLTabBarItemTitlePositionAdjustment: [NSValue valueWithUIOffset:UIOffsetMake(0, 1)],//设置文本与图片的Position
                                                  };
    
    NSDictionary *thirdTabBarItemsAttributes = @{
                                                 CYLTabBarItemTitle : @"消息",
                                                 CYLTabBarItemImage : [UIImage imageNamed:@"message_normal"],
                                                 CYLTabBarItemSelectedImage : @"message_highlight",
                                                 CYLTabBarItemTitlePositionAdjustment: [NSValue valueWithUIOffset:UIOffsetMake(0, 1)],//设置文本与图片的Position
                                                 };
    
    NSDictionary *fourthTabBarItemsAttributes = @{
                                                  CYLTabBarItemTitle : @"我的",
                                                  CYLTabBarItemImage :[UIImage imageNamed:@"account_normal"],
                                                  CYLTabBarItemSelectedImage : @"account_highlight",
                                                  CYLTabBarItemTitlePositionAdjustment: [NSValue valueWithUIOffset:UIOffsetMake(0, 1)],//设置文本与图片的Position
                                                  };
    NSArray *tabBarItemsAttributes = @[
                                       firstTabBarItemsAttributes,
                                       secondTabBarItemsAttributes,
                                       thirdTabBarItemsAttributes,
                                       fourthTabBarItemsAttributes
                                       ];
    return tabBarItemsAttributes;
}

/**
 *  更多TabBar自定义设置：比如：tabBarItem 的选中和不选中文字和背景图片属性、tabbar 背景图片属性等等
 */
- (void)customizeTabBarAppearanceWithTitlePositionAdjustment:(UIOffset)titlePositionAdjustment {
    // Customize UITabBar height
    // 自定义 TabBar 高度
//     tabBarController.tabBarHeight = CYL_IS_IPHONE_X ? 65 : 40;
    
    [self rootWindow].backgroundColor = [UIColor cyl_systemBackgroundColor];
    
    // set the text color for unselected state
    // 普通状态下的文字属性
    NSMutableDictionary *normalAttrs = [NSMutableDictionary dictionary];
    normalAttrs[NSForegroundColorAttributeName] = [UIColor cyl_systemGrayColor];
    //normalAttrs[NSFontAttributeName] = [UIFont systemFontOfSize:10];
    
    // set the text color for selected state
    // 选中状态下的文字属性
    NSMutableDictionary *selectedAttrs = [NSMutableDictionary dictionary];
    selectedAttrs[NSForegroundColorAttributeName] = [UIColor cyl_labelColor];
    
    if (@available(iOS 13.0, *)) {
        UITabBarItemAppearance *inlineLayoutAppearance = [[UITabBarItemAppearance  alloc] init];
        inlineLayoutAppearance.normal.titlePositionAdjustment = titlePositionAdjustment;

        // set the text Attributes
        // 设置文字属性
        [inlineLayoutAppearance.normal setTitleTextAttributes:normalAttrs];
        [inlineLayoutAppearance.selected setTitleTextAttributes:selectedAttrs];

        UITabBarAppearance *standardAppearance = [[UITabBarAppearance alloc] init];
        standardAppearance.stackedLayoutAppearance = inlineLayoutAppearance;
        standardAppearance.backgroundColor = [UIColor cyl_systemBackgroundColor];
        //shadowColor和shadowImage均可以自定义颜色, shadowColor默认高度为1, shadowImage可以自定义高度.
//        standardAppearance.shadowColor = [UIColor cyl_systemGreenColor];
        // standardAppearance.shadowImage = [[self class] imageWithColor:[UIColor cyl_systemGreenColor] size:CGSizeMake([UIScreen mainScreen].bounds.size.width, 1)];
        self.tabBar.standardAppearance = standardAppearance;
    } else {
        // Override point for customization after application launch.
        // set the text Attributes
        // 设置文字属性
        UITabBarItem *tabBar = [UITabBarItem appearance];
        [tabBar setTitleTextAttributes:normalAttrs forState:UIControlStateNormal];
        [tabBar setTitleTextAttributes:selectedAttrs forState:UIControlStateSelected];
        
        // This shadow image attribute is ignored if the tab bar does not also have a custom background image.So at least set somthing.
        [[UITabBar appearance] setBackgroundImage:[[UIImage alloc] init]];
        [[UITabBar appearance] setShadowImage:[[self class] imageWithColor:[UIColor cyl_systemGreenColor] size:CGSizeMake([UIScreen mainScreen].bounds.size.width, 1)]];
    }
}

//TabBar点击事件
- (void)tabBarController:(UITabBarController *)tabBarController didSelectControl:(UIControl *)control {
    UIView *animationView = [control cyl_tabImageView];
    
    [self addScaleAnimationOnView:animationView repeatCount:1];
    
    if(tabBarController.selectedIndex == 2){
        [self.selectedViewController cyl_clearBadge];
    }
}

//设置数字角标
- (void)showTabBarBadgeWithIndex:(NSInteger)index badge:(NSString *)badge{
    if(self.viewControllers.count > index){
        [self.viewControllers[index] cyl_showBadgeValue:@"90" animationType:CYLBadgeAnimationTypeNone];
    }
}

//缩放动画
- (void)addScaleAnimationOnView:(UIView *)animationView repeatCount:(float)repeatCount {
    //需要实现的帧动画，这里根据需求自定义
    CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
    animation.keyPath = @"transform.scale";
    animation.values = @[@1.0,@1.3,@0.9,@1.15,@0.95,@1.02,@1.0];
    animation.duration = 1;
    animation.repeatCount = repeatCount;
    animation.calculationMode = kCAAnimationCubic;
    [animationView.layer addAnimation:animation forKey:nil];
}

+ (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size {
    if (!color || size.width <= 0 || size.height <= 0) return nil;
    CGRect rect = CGRectMake(0.0f, 0.0f, size.width + 1, size.height);
    UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, color.CGColor);
    CGContextFillRect(context, rect);
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

#import "AppDelegate.h"
#import "MainTabBarController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    [self.window makeKeyAndVisible];
    
    MainTabBarController *tabBarController = [[MainTabBarController alloc] initTabBar];
    [self.window setRootViewController:tabBarController];
    
    //模拟数字角标
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [tabBarController showTabBarBadgeWithIndex:3 badge:@"100"];
    });
    
    return YES;
}

@end