自定义转场

推荐文章：
http://www.cocoachina.com/ios/20160215/15263.html






自定义转场：


http://www.cocoachina.com/ios/20160215/15263.html


http://www.cocoachina.com/industry/20131017/7187.html






1.
http://www.jianshu.com/p/bd7bf438b288






转场学习：
1.https://onevcat.com/2013/10/vc-transition-in-ios7/
2.http://www.cocoachina.com/ios/20160215/15263.html