iOS LockScreen Notification

ios_lockscreen_notification.m

// iOS ロックスクリーン Notification

#define NotifName_LockComplete @"com.apple.springboard.lockcomplete"
#define NotifName_LockState    @"com.apple.springboard.lockstate"


//call back
static void lockStatusChanged(CFNotificationCenterRef center, void *observer, CFStringRef name_cf, const void *object, CFDictionaryRef userInfo){
    NSString *name = (__bridge NSString*)name_cf;
    if ([name isEqualToString:NotifName_LockComplete]) {
        NSLog(@"DEVICE LOCKED");
    } else if ([name isEqualToString:NotifName_LockState]) {
        NSLog(@"LOCK STATUS CHANGED");
    }
}


- (void)registerforDeviceLockNotif {
    //Screen lock notifications
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                    NULL,
                                    lockStatusChanged,
                                    (__bridge CFStringRef)NotifName_LockComplete,
                                    NULL,
                                    CFNotificationSuspensionBehaviorDeliverImmediately);
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                    NULL,
                                    lockStatusChanged,
                                    (__bridge CFStringRef)NotifName_LockState,
                                    NULL,
                                    CFNotificationSuspensionBehaviorDeliverImmediately);
}

sample_AppDelegate.m

// LockScreen Notification
#define NotifName_LockComplete @"com.apple.springboard.lockcomplete"
static bool go_lockscreen_when_active = false; // アプリがアクティブ状態でロック画面に遷移したよフラグ

@implementation AppDelegate

// LockScreen Notification
static void didGoLockscreen(CFNotificationCenterRef center, void *observer, CFStringRef name_cf, const void *object, CFDictionaryRef userInfo){
    NSString *name = (__bridge NSString*)name_cf;
    if (![name isEqualToString:NotifName_LockComplete]) return;
    if ([UIApplication sharedApplication].applicationState == UIApplicationStateActive) {
        go_lockscreen_when_active = true;
    }
}

- (void)registerforDeviceLockNotif {
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                    NULL,
                                    didGoLockscreen,
                                    (__bridge CFStringRef)NotifName_LockComplete,
                                    NULL,
                                    CFNotificationSuspensionBehaviorDeliverImmediately);
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
    [self registerforDeviceLockNotif];
    //  ...
    return YES;
}

- (void)applicationWillEnterForeground:(UIApplication *)application{
    if (go_lockscreen_when_active) {
        // アクティブ状態でロック画面になった == ロック画面から復帰
        //  ...
        go_lockscreen_when_active = false;
    } else {
        // ホーム画面、別アプリ等から復帰
        //  ...
    }
}
@end

Did anybody solve this?