height = 480 / width = 320
5s
height = 568 / width = 320
6
height = 667 / width = 375
6plus
height = 736 / width = 414
****************self.view.bounds.size
height = 480 / width = 320
5s
height = 568 / width = 320
6
height = 667 / width = 375
6plus
height = 736 / width = 414
原文：http://www.cnblogs.com/juicecoffeetea/p/4701558.html