iOS rootViewController定义切换动画

如何切换root时有动画效果呢？

有些需求会让我们比较头疼，某些场景需要切换root而且还要一些动画效果，从而提高用户体验！这个时候不要着急有转场动画这个玩意呢！

转场动画有两种 1.系统提供的专场动画方法 2.自定义专场动画（转场效果比较全面）

• 1.系统提供的专场动画方法

      ZYTabBarViewController *tabbarController = [[ZYTabBarViewController alloc] init];
      typedef void (^Animation)(void);
      UIWindow* window = self.window;
      tabbarController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
      [UIView transitionWithView:window
                      duration:1
                       options:UIViewAnimationOptionTransitionCrossDissolve
                    animations:^{
                        BOOL oldState = [UIView areAnimationsEnabled];
                        [UIView setAnimationsEnabled:NO];
                        window.rootViewController = tabbarController;
                        [UIView setAnimationsEnabled:oldState];
                    } completion:nil];
  

• 2.自定义专场动画(该方法不适用于Nav)

        CATransition *animation = [CATransition animation];
        //动画时间
        animation.duration = 0.3f;
        //过滤效果
        animation.type = kCATransitionReveal;
        //枚举值:
        kCATransitionPush 推入效果
        kCATransitionMoveIn 移入效果
        kCATransitionReveal 截开效果
        kCATransitionFade 渐入渐出效果
        //动画执行完毕时是否被移除
        animation.removedOnCompletion = YES;
        //设置方向-该属性从下往上弹出
        animation.subtype = kCATransitionFromBottom;
        枚举值:
        kCATransitionFromRight//右侧弹出
        kCATransitionFromLeft//左侧弹出
        kCATransitionFromTop//顶部弹出
        kCATransitionFromBottom//底部弹出
        [self.window.layer addAnimation:animation forKey:nil];
        self.window.rootViewController = tabbarController;
  

• 转场动画用type的另一种动画效果

       CATransition *animation = [CATransition animation];
       animation.duration = 1.0;
       //如果想要监听动画的开始和结束有代理方法(最底下)
       animation.delegate = self;
       //设置动画的快慢效果 动画的时间节奏控制
       animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
  
       枚举值:
       kCAMediaTimingFunctionLinear 匀速
       kCAMediaTimingFunctionEaseIn 慢进
       kCAMediaTimingFunctionEaseOut 慢出
       kCAMediaTimingFunctionEaseInEaseOut 慢进慢出
       kCAMediaTimingFunctionDefault 默认值（慢进慢出）
  
       animation.type =  @"pageCurl"  //向上翻一页
  
       //私有API,注意对于苹果官方没公开的动画类型只能使用字符串，并没有对应的常量定义
       animation.type =  @"cube"  //立方体效果
       animation.type =  @"suckEffect" //收缩效果，如一块布被抽走
       animation.type =  @"oglFlip"  //上下翻转效果
       animation.type =  @"rippleEffect"  //滴水效果
       animation.type =  @"pageCurl"  //向上翻一页
       animation.type =  @"pageUnCurl"  //向下翻一页
       animation.type =  @“cameraIrisHollowOpen”  //摄像头打开效果
       animation.type =  @“cameraIrisHollowClose”  //摄像头关闭效果
  
       //设置动画子类型
       animation.subtype = kCATransitionFromTop;
  
       枚举值:
       kCATransitionFromRight//右侧弹出
       kCATransitionFromLeft//左侧弹出
       kCATransitionFromTop//顶部弹出
       kCATransitionFromBottom//底部弹出
       [self.window.layer addAnimation:animation forKey:nil];
       self.window.rootViewController = tabbarController;
  
        //代理方法
       - (void)animationDidStart:(CAAnimation *)anim{
         动画开始
       }
  
       - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{
         动画结束
       }