开发笔记:iosCAAnimation 实现push效果显示模态控制器（presentViewController）

// 要显示的控制器
　　BusinessWebController * businessVC = [[BusinessWebController alloc] init];
/**
* addSubView的方式
*/
// 　　[mainVC addChildViewController:businessVC];
//        [mainVC.view addSubview:businessVC.view];
/// 在view的layer上 addAnimation （加 、 被加）
//        [mainVC.view.layer addAnimation:transition forKey:nil];
// 切换跟控制器的方式
　　[UIApplication sharedApplication].keyWindow.rootViewController = businessVC;
[UIApplication sharedApplication].keyWindow.backgroundColor = [UIColor whiteColor];
// 构建push效果动画
CATransition *transition = [CATransition animation];
transition.duration = 0.15;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault];
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromRight;
transition.delegate = self;
[businessVC.view.layer addAnimation:transition forKey:nil];