概念在UIView里面有一个方法layoutSubviews: 复制代码 代码如下: - (void)layoutSubviews; // override point. called by layoutIfNeeded automatically. As of iOS 6.0, when constraints-based layout is used the base implementation applies the constraints-based layout, otherw
iOS 7 UI Transition Guide Preparing for Transition Before You Start Scoping the Project Supporting iOS 6 Updating the UI Appearance and Behavior Bars and Bar Buttons Content Views Controls Temporary Views Supporting iOS 6 If business reasons require