版本v1.29.0 修复分割线和Lottie动画播放异常等bugs

[ChenYilong]

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今天把 CYLTabBarController 更新到1.29.0, 修了几个issue, 主要是顶部导航栏, 主要修复的功能:

• TabBar 自定义分割线
• 隐藏 TabBar 分割线的方法

将更新的代码贴一下:

TabBar 自定义分割线

// NO.1，using Image note:recommended.推荐方式
   // set the bar shadow image
   // without shadow : use -[[CYLTabBarController hideTabBarShadowImageView] in CYLMainRootViewController.m
   if (@available(iOS 13.0, *)) {
       UITabBarItemAppearance *inlineLayoutAppearance = [[UITabBarItemAppearance  alloc] init];
       // 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];
       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)]];
   }

可以使用:

v1.29.0 更新了内部实现, 兼容了 iOS13+ ,和 iOS13- 版本.

-[[CYLTabBarController hideTabBarShadowImageView] 

其中重要的部分在于找到分割线对应的 View, 实现方法如下:

- (UIImageView *)cyl_tabShadowImageView {
   if (@available(iOS 10.0, *)) {
       //iOS10及以上这样获取ShadowImageView：
       UIView *subview = [self cyl_tabBackgroundView];
       if (!subview) {
           return nil;
       }
       NSArray<__kindof UIView *> *backgroundSubviews = subview.subviews;
       //iOS13系统backgroundSubviews.count > 1可行，12及以下就不可行了
       if (backgroundSubviews.count >= 1) {
           for (UIView *subview in backgroundSubviews) {
               if (CGRectGetHeight(subview.bounds) <= 1.0 ) {
                   return (UIImageView *)subview;
               }
           }
       }
   } else {
       //iOS9这样获取ShadowImageView：
       for (UIView *subview in self.subviews) {
           if (CGRectGetHeight(subview.bounds) <= 1.0 ) {
               return (UIImageView *)subview;
           }
       }
   }
   return nil;
}

隐藏 TabBar 分割线的方法

Lottie 动画在某些场景不播放的问题

详情参见 #423 issue.

fix issues: #431 #436 #492 #423

项目地址: https://github.com/ChenYilong/CYLTabBarController

[ChenYilong]

注意

UITabBarAppearance *standardAppearance = [[UITabBarAppearance alloc] init];
//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)];

[Lee0820]

你好，我这么设置了确实达到了设置分割线的效果，但是 CYLTabBarItemTitlePositionAdjustment设置的偏移量就失效了，是时机问题不对吗？请问下作者，这个问题修复了吗？

[ChenYilong]

@Lee0820 偏移量相关的代码我没动，是不是不设置分割线就生效了？

[Lee0820]

对的，用UITabBarAppearance 设置 ShadowImage,后 CYLTabBarItemTitlePositionAdjustment设置的偏移量就失效了，我在微信也请教过这个问题，不知道是不是系统的bug，13.4.1，我用老api设置分割线也是有效的 [[UITabBar appearance] setShadowImage:，13.3上不行～

[ChenYilong]

@Lee0820 Lee 在这里回复你了 https://github.com/ChenYilong/CYLTabBarController/issues/456

[humoroutlaw]

iOS 13.2.3 顶部横线无法显示,图层也看不到shadowImage.

- (void)customizeTabBarAppearance {
     [self rootWindow].backgroundColor = [UIColor cyl_systemBackgroundColor];


   NSMutableDictionary *normalAttrs = [NSMutableDictionary dictionary];
   normalAttrs[NSForegroundColorAttributeName] = [UIColor cyl_systemGrayColor];
   
   NSMutableDictionary *selectedAttrs = [NSMutableDictionary dictionary];
   selectedAttrs[NSForegroundColorAttributeName] = [UIColor cyl_labelColor];
  
  if (@available(iOS 13.0, *)) {
          UITabBarItemAppearance *inlineLayoutAppearance = [[UITabBarItemAppearance  alloc] init];
          [inlineLayoutAppearance.normal setTitleTextAttributes:normalAttrs];
          [inlineLayoutAppearance.selected setTitleTextAttributes:selectedAttrs];
      
          UITabBarAppearance *standardAppearance = [[UITabBarAppearance alloc] init];
          standardAppearance.stackedLayoutAppearance = inlineLayoutAppearance;
          standardAppearance.backgroundColor = [UIColor cyl_systemBackgroundColor];
          standardAppearance.shadowImage = [[self class] imageWithColor:[UIColor cyl_systemGreenColor] size:CGSizeMake([UIScreen mainScreen].bounds.size.width, 1)];
          self.tabBar.standardAppearance = standardAppearance;
      } else {
          UITabBarItem *tabBar = [UITabBarItem appearance];
          [tabBar setTitleTextAttributes:normalAttrs forState:UIControlStateNormal];
          [tabBar setTitleTextAttributes:selectedAttrs forState:UIControlStateSelected];
          [[UITabBar appearance] setBackgroundImage:[[UIImage alloc] init]];
          [[UITabBar appearance] setShadowImage:[[self class] imageWithColor:[UIColor cyl_systemGreenColor] size:CGSizeMake([UIScreen mainScreen].bounds.size.width, 1)]];
      }
}