iOS 锁屏判断

iOS 锁屏判断

应用程序的单例类对象中得到应用程序委托的对象 

UIApplicationDelegate* myDelegate = [[UIApplication sharedApplication] delegate];

UIApplication 接收到所有的系统事件和生命周期事件时，都会把事件传递给UIApplicationDelegate进行处理，对于用户输入事件，则传递给相应的目标对象去处理。

- (void)applicationWillResignActive:(UIApplication *)application 

   通知委托应用程序将进入非活动状态，在此期间，应用程序不接收消息或事件。

这个方法在用户锁住屏幕时，也会调用。

与之相适应的是应用程序重新被用户打开时的委托 方法。另外常用的就是内存不足的系统警告，此时会调用应用程序委托类的applicationDidReceiveMemoryWarning()方法， 然后我们就可以试着释放一些内存了。

CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, updateEnabled, CFSTR("com.apple.iokit.hid.displayStatus"), NULL, CFNotificationSuspensionBehaviorDeliverImmediately);

    // 1状态

    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, lockComplete, CFSTR("com.apple.springboard.lockcomplete"), NULL, CFNotificationSuspensionBehaviorDeliverImmediately);

    // 2状态

    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, lockState, CFSTR("com.apple.springboard.lockstate"), NULL, CFNotificationSuspensionBehaviorDeliverImmediately);

static void updateEnabled(CFNotificationCenterRef center, void* observer, CFStringRef name, const void* object, CFDictionaryRef userInfo) {

    uint64_t state;

    int token;

    notify_register_check("com.apple.iokit.hid.displayStatus", &token);

    notify_get_state(token, &state);

    notify_cancel(token);

    NSLog(@"锁屏状态：%llu",state);

}

static void lockComplete(CFNotificationCenterRef center, void* observer, CFStringRef name, const void* object, CFDictionaryRef userInfo) {

    uint64_t state;

    int token;

    notify_register_check("com.apple.springboard.lockcomplete", &token);

    notify_get_state(token, &state);

    notify_cancel(token);

    NSLog(@"lockComplete状态：%llu",state);

}

static void lockState(CFNotificationCenterRef center, void* observer, CFStringRef name, const void* object, CFDictionaryRef userInfo) {

    uint64_t state;

    int token;

    notify_register_check("com.apple.springboard.lockstate", &token);

    notify_get_state(token, &state);

    notify_cancel(token);

    NSLog(@"lockState状态：%llu",state);

}