主要介绍了iOS中UIView的layoutSubviews子视图布局方法使用,文中举了一个layoutSubviews在iPad横竖屏切换时被调用用来重新布局的实例,需要的朋友可以参考下

概念 在UIView里面有一个方法layoutSubviews： 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, otherwise