Customed searchBar embed in searchBar. update to iOS 11. run in Xcode 9.2
定制searchBar导航栏，解决了一些在iOS 11下样式不统一的问题，博客见https://juejin.im/post/5a367c9f6fb9a045186ad15b
Customed searchBar embed in searchBar. update to iOS 11. run in Xcode 9.2
定制searchBar导航栏，解决了一些在iOS 11下样式不统一的问题，博客见https://juejin.im/post/5a367c9f6fb9a045186ad15b