在开发中，视图切换会常常遇到，有时我们不是基于导航控制器的切换，但实际开发中，有时需要做成push效果，下面将如何实现push和pop 默认动画效果代码实例：
一、push默认动画效果
CATransition *transition = [CATransition animation];
transition.duration = 0.3f;
transition.timingFunction = [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromRight;
transition.delegate = self;
[self.contentView.layer addAnimation:transition forKey:nil];
[self.contentView addSubview:self.productDetailController.view];
注：self.contentView是工程中的UIView，self.productDetailController是工程中的controller
只需要把两者替换成合适的内容即可用
二、pop默认动画效果
CATransition *transition = [CATransition animation];
transition.duration = 0.3f;
transition.timingFunction = [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromLeft;
transition.delegate = self;
[self.view.superview.layer addAnimation:transition forKey:nil];
[self.view removeFromSuperview];
说明：.type 设置了主要的页面切换显示形式
.subtype 设置了页面的旋转 左右上下
