检查用户是否允许本地通知. iOS 8. Obj-C

如果用户允许本地通知,是否没有简单的测试方法？在我拒绝发送本地通知后,我在控制台中发现了警告.当相关事件发生时,它表示该应用程序尝试发送通知,即使用户不允许它.我想在尝试显示通知之前检查是否允许它.在我的情况下看评论,我该怎么做？

我的代码是：

app = [UIApplication sharedApplication];
-(void)showBACkgroundNotification:(NSString *) message {
//check if app is in BACkground and check if local notifications are allowed.
    if (app.applicationState == UIApplicationStateBACkground /*&& localnotificationsAreAllowed*/){
        UIlocalnotification *note = [[UIlocalnotification alloc]init];
        note.alertBody = message;
        note.fireDate = [NSDate dateWithTimeIntervalSinceNow:0.0];
        [app schedulelocalnotification :note];
    }
}

我得到用户的提示,如下所示：

UIUserNotificationSetTings *setTings;
if ([app     respondsToSELEctor:@SELEctor(registerUserNotificationSetTings:)])
{
    setTings = [UIUserNotificationSetTings setTingsForTypes:(UIUserNotificationTypeBadge|UIUserNotificationTypeAlert|UIUserNotification    TypeSound) categories:nil];
    [app registerUserNotificationSetTings:setTings];
}

我不能使用设置对象？

编辑：我想我已经解决了.这似乎有效.

-(void)showBACkgroundNotification:(NSString *) message {
    if (app.applicationState == UIApplicationStateBACkground && [app currentUserNotificationSetTings].types != UIUserNotificationTypeNonE){
        UIlocalnotification *note = [[UIlocalnotification alloc]init];
        note.alertBody = message;
        note.fireDate = [NSDate dateWithTimeIntervalSinceNow:0.0];
        [app schedulelocalnotification :note];
    }
}

+ (BOOL)notificationsEnabled {
    UIUserNotificationSetTings *setTings = [[UIApplication sharedApplication] currentUserNotificationSetTings];
    return setTings.types != UIUserNotificationTypeNone;
}