0515.View Hierarchy [UIKit] - c++编程基础

w *)subview; - (void)willMoveToSuperview:(UIView *)newSuperview; - (void)didMoveToSuperview; - (void)willMoveToWindow:(UIWindow *)newWindow; - (void)didMoveToWindow;

思考：视图回调主要是用于跟踪视图的相关改变

5、Set view tag and search view

myView.tag = 1011;

UILabel *label =(UILablel *)[self.view viewWithTag:1011];

6、isDescendantOfView

- (BOOL)isDescendantOfView:(UIView *)view;

思考：主要用于判断的一个View是不是另一个View的子subView

0515.View Hierarchy [UIKit](二)