iOS锁屏通知(Objective-C)

lock.m

//回调
static void displayStatusChanged(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo) {
    // "com.apple.springboard.lockcomplete" 通知总是接在 "com.apple.springboard.lockstate" 通知后面
    CFStringRef nameCFString = (CFStringRef)name;
    NSString *lockState = (__bridge NSString*)nameCFString;
    NSLog(@"Darwin notification NAME = %@",name);
    
    if([lockState isEqualToString:@"com.apple.springboard.lockcomplete"]) {
        NSLog(@"锁屏");
    } else {
        NSLog(@"锁屏状态改变");
    }
}

- (void)registerforDeviceLockNotif {
    //锁屏通知
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.springboard.lockcomplete"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);
    
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.springboard.lockstate"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);
}