隐藏navigationController踩过的坑
http://www.jianshu.com/p/b46166b05f02
http://www.jianshu.com/p/5105343a6b33
导航栏透明渐变色的第三方
https://github.com/ltebean/LTNavigationBar
隐藏navigationController踩过的坑
http://www.jianshu.com/p/b46166b05f02
http://www.jianshu.com/p/5105343a6b33
导航栏透明渐变色的第三方
https://github.com/ltebean/LTNavigationBar