keyWindow

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最新推荐文章于 2024-06-30 17:23:45 发布

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本文链接：https://blog.youkuaiyun.com/zhoupengju/article/details/51049863

本文通过使用NSLog打印出UIApplication共享实例中的所有窗口，展示了如何获取iOS应用中的第一个和最后一个窗口，以及当前活动窗口(keyWindow)。这对于理解iOS应用中UI管理的内部工作原理非常有帮助。

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NSLog(@"====%@", [UIApplication sharedApplication].windows);

NSLog(@"====%@", [[UIApplication sharedApplication].windows firstObject]);

NSLog(@"====%@", [[UIApplication sharedApplication].windows lastObject]);

NSLog(@"====%@", [UIApplication sharedApplication].keyWindow);

<UIWindow: 0x7fb7084b2b20; frame = (0 0; 375 667); gestureRecognizers = <NSArray: 0x7fb7084b4540>; layer = <UIWindowLayer: 0x7fb7084b2ad0>>,

<UITextEffectsWindow: 0x7fb70a866d60; frame = (0 0; 375 667); opaque = NO; autoresize = W+H; layer = <UIWindowLayer: 0x7fb70a867490>>,

)

2016-04-03 12:53:21.385 ZhenHuiWan[12199:428033] ====<UIWindow: 0x7fb7084b2b20; frame = (0 0; 375 667); gestureRecognizers = <NSArray: 0x7fb7084b4540>; layer = <UIWindowLayer: 0x7fb7084b2ad0>>

2016-04-03 12:53:21.385 ZhenHuiWan[12199:428033] ====<UITextEffectsWindow: 0x7fb70a866d60; frame = (0 0; 375 667); opaque = NO; autoresize = W+H; layer = <UIWindowLayer: 0x7fb70a867490>>

2016-04-03 12:53:21.385 ZhenHuiWan[12199:428033] ====<UIWindow: 0x7fb7084b2b20; frame = (0 0; 375 667); gestureRecognizers = <NSArray: 0x7fb7084b4540>; layer = <UIWindowLayer: 0x7fb7084b2ad0>>