app설정의 notification 설정값 가져와서 업데이트 하기.

system setting에서 application의 notification 설정값을 변경하면,  application에서 그 값을 가져와 반영하는 방법.


1. uiviewcontroller에 notification 등록

[[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(applicationEnteredForeground:)

                                                 name:UIApplicationWillEnterForegroundNotification

                                               object:nil];

- (void)applicationEnteredForeground:(NSNotification *)notification {

    [self updateNotificationSound];

}

2. 설정값 가져오기 

- (void)updateNotificationSound

{

    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")){

        UIUserNotificationType type = [[[UIApplication sharedApplication] currentUserNotificationSettings] types];

        if (type & UIUserNotificationTypeSound){

            _notificationSettingValue.text = @"소리";

        } else {

            _notificationSettingValue.text = @"무음";

        }

    } else {

        UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];

        if (types & UIRemoteNotificationTypeSound) {

            _notificationSettingValue.text = @"소리";

        } else {

            _notificationSettingValue.text = @"무음";

        }

    }

}

3. 상수값의 의미:

UIUserNotificationTypeNone : Allow Notifications on/off

UIUserNotificationTypeBadge : Badge App Icon on/off

UIUserNotificationTypeSound : Sounds on/off

@ How to open application system notification setting view

- (void)launchSystemApplicationNotificationSettingView {

    if (&UIApplicationOpenSettingsURLString)

    { //only for ios8

        NSURL *appSettings = [NSURL URLWithString:UIApplicationOpenSettingsURLString];

        [[UIApplication sharedApplication] openURL:appSettings];
    }

}