Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
如何在 .cpp 文件中向 UIView 框架添加观察者
像这样(目标-c): [view addObserver:videoAd forKeyPath:@"frame" options:0 context:NULL];
[view addObserver:videoAd forKeyPath:@"frame" options:0 context:NULL];