摘要： loadView;This is where subclasses should create their custom view hierarchy if they aren't using a nib. Should never be called directly.这是当他们没有正在使用nib视图页面，子类将会创建自己的自定义视图层。绝不能直接调用。viewDidLoad;Called after the view has been loaded. For view controllers created in code, this is after -loadView. For 阅读全文