iphone怎么检测屏幕是否被点亮（用UIApplication的Delegate）

本文转载至 http://gaohaijun.blog.163.com/blog/static/176698271201161524857373/

问题：那位能说一下怎么能检测到iphone的屏幕现在是否在被点亮的状态，还是被关闭的黑屏状态，
要用那个api ，给点提示谢谢了。

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- (void)didTurnOnDisplay;
- (void)didTurnOffDisplay;

没有测试，但是相信可以。

刚刚测试，假如是子类化UIApplication是无法接受到这个方法的。用Objc Runtime的method_exchangeImplementations(method, method)就可以。

以下代码：

UIApplication方面：

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@interface UIApplication (_)
- (void)handleDidTurnOnDisplay;
- (void)handleDidTurnOffDisplay;
@end
@implementation UIApplication (_)
- (void)handleDidTurnOnDisplay
{
NSLog(@"Did turn on display.");
//[self handleDidTurnOnDisplay];
}
- (void)handleDidTurnOffDisplay
{
NSLog(@"Did turn off display.");
//[self handleDidTurnOffDisplay];
}
@end

UIApplicationDelegate:

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- (void)applicationDidFinishLaunching:(UIApplication *)application {
Method m1 = class_getInstanceMethod([UIApplication class], @selector(didTurnOnDisplay));
Method m2 = class_getInstanceMethod([UIApplication class], @selector(didTurnOffDisplay));
Method m3 = class_getInstanceMethod([UIApplication class], @selector(handleDidTurnOnDisplay));
Method m4 = class_getInstanceMethod([UIApplication class], @selector(handleDidTurnOffDisplay));
method_exchangeImplementations(m1, m3);
method_exchangeImplementations(m2, m4);
[window makeKeyAndVisible];
}
- (void)applicationWillResignActive:(UIApplication *)application
{
NSLog(@"Application will resign active.");
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
NSLog(@"Application did become active.");
}

以上代码在打开后关闭屏幕再打开的条件下输出：

引用

2009-08-17 19:05:37.770 *[380:207] Application did become active.
2009-08-17 19:06:36.370 *[380:207] Did turn off display.
2009-08-17 19:06:36.452 *[380:207] Application will resign active.
2009-08-17 19:06:43.310 *[380:207] Did turn on display.
2009-08-17 19:06:43.415 *[380:207] Application did become active.

可见这个是方法在delegate的willResignActive和didBecomeActive之前调用。

其实屏幕在变黑时, 会通知程序
- (void)applicationWillResignActive:(UIApplication *)application;

而解锁后变亮会触发
- (void)applicationDidBecomeActive:(UIApplication *)application;

转载于:https://www.cnblogs.com/Camier-myNiuer/p/3640525.html