目录方法一：位置截取方法二，左右按照字符串截断，#从做到右 ，%从右到左。方法一：位置截取
ho开发者_StackOverflow中文版w can i display a image on button which is presented on UINavigationController iphone ?if you mean the back button that is displaying on the Navigation Bar
加载中,请稍侯......