图片切换动画

    参考 https://www.jianshu.com/p/239cf81eb1eb 

self.loginBgImageView = [[UIImageView alloc]initWithFrame:CGRectMake(10, 66, screenW - 20, 300)];

    [self.loginBgImageView setImage:[UIImage imageNamed:@"niaoren"]];

    [self.view addSubview:self.loginBgImageView];

切换图片的地方

  CATransition *transition = [CATransition animation];

    transition.duration = 3;

    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    transition.type = kCATransitionFade;

    [self.loginBgImageView.layer addAnimation:transition forKey:nil];

    [self.loginBgImageView setImage:[UIImage imageNamed:@"lufei"]];

 //动画切换的方式

    /*1.kCATransitionMoveIn 新的视图把旧的视图掩盖

     *2.kCATransitionPush 旧的视图移走，新的视图移进来

     *3.kCATransitionFade 逐渐消失，相当于调整透明度，除了这没有方向，其他的都有

     *4.kCATransitionReveal 旧的视图移走，显示出新的视图

     */

//    animation.type = kCATransitionReveal;

//这类是API引入的，在苹果官网是不会承认的，所以不建议使用

    /*1.animation.type = @"cube"; //立方体效果

     *2.animation.type = @"suckEffect";//犹如一块布被抽走

     *3. animation.type = @"oglFlip"; //上下翻转效果

     *4. animation.type = @"rippleEffect"; //滴水效果

     *5. animation.type = @"pageCurl"; //向左翻页

     *6.animation.type = @"pageUnCurl"; //向下翻页

     *7.cameraIrisHollowClose //  关镜头

      *8.cameraIrisHollowOpen // 开镜头

     */

控制器跳转

 CATransition *transition = [CATransition animation];

    transition.duration = 3;

    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    transition.type = kCATransitionFade;

    //transition.type = @"cube";

    [self.navigationController.view.layer addAnimation:transition forKey:nil];

    SecAnimViewController *test = [[SecAnimViewController alloc]init];

    test.hidesBottomBarWhenPushed = YES;

    [self.navigationController pushViewController:test animated:YES];