ios - UIWindow keyWindow 更改通知

Question

我正在创建一个越狱调整，向 UIWindow 添加一个 View ，无论当前的 keyWindow 是什么。问题是每当 keyWindow 发生变化时， View 就会被删除。

我在用这个

%hook SBApplication
-(void)willActivate {
    UIWindow *window = [[UIApplication sharedApplication] keyWindow];
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0,320,53)];
    view.backgroundColor = [UIColor greenColor];
    [window addSubview:view];
}
%end

有没有其他方法更适合在这里使用，或者是否有在窗口更改时发送的通知？

Answer 1

是的，您可以观察到一条通知:

UIWindowDidBecomeKey

Posted whenever a UIWindow object becomes the key window. The notification object is the window object that has become key. This notification does not contain a userInfo dictionary.

More in the docs.