Question

您好我的应用程序我有通知部分，用户可以使用开关启用通知。首次启动时，当我的用户在交换机上我不允许或来自ios的提醒。如果用户选择不允许和切换将关闭，用户将不会收到通知。现在，如果用户尝试在交换机上，我想向用户显示一条警告“请从设置中启用通知”。任何人都可以建议这样做。

Answer 1

您可以使用isRegisteredForRemoteNotifications方法检查权限。

- (void)checkForNotificationPermission
{
    if (!([[UIApplication sharedApplication] isRegisteredForRemoteNotifications] && [self pushNotificationsEnabled])) 
    {
       // Show alert here
    }
}


// For fixing iOS 8 issue mentioned here http://stackoverflow.com/a/28441181/1104384
- (BOOL)pushNotificationsEnabled
{
    if ([[UIApplication sharedApplication] respondsToSelector:@selector(currentUserNotificationSettings)])
    {
        UIUserNotificationType types = [[[UIApplication sharedApplication] currentUserNotificationSettings] types];
        return (types & UIUserNotificationTypeAlert);
    }
    else
    {
        UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
        return (types & UIRemoteNotificationTypeAlert);
    }
}

Answer 2

对于UILocalNotification权限，请检查以下内容，types参数值将是无用户不允许的。

[[UIApplication sharedApplication] currentUserNotificationSettings]

Answer 3

NSString *iOSversion = [[UIDevice currentDevice] systemVersion];
            NSString *prefix = [[iOSversion componentsSeparatedByString:@"."] firstObject];
            float versionVal = [prefix floatValue];


            if (versionVal >= 8)
            {
                if ([[UIApplication sharedApplication] currentUserNotificationSettings].types != UIUserNotificationTypeNone)
                {

                    NSLog(@" Push Notification ON");
                }
                else
                {

                    NSString *msg = @"Please press ON to enable Push Notification";
                    UIAlertView *alert_push = [[UIAlertView alloc] initWithTitle:@"Push Notification Service Disable" message:msg delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Setting", nil];
                    alert_push.tag = 2;
                    [alert_push show];

                    NSLog(@" Push Notification OFF");

                }

            }
            else
            {
                UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
                if (types != UIRemoteNotificationTypeNone)

                {
                    NSLog(@" Push Notification ON");

                }
                else
                {
                    NSString *msg = @"Please press ON to enable Push Notification";
                    UIAlertView *alert_push = [[UIAlertView alloc] initWithTitle:@"Push Notification Service Disable" message:msg delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Setting", nil];
                    alert_push.tag = 2;
                    [alert_push show];

                    NSLog(@" Push Notification OFF");
                }

            }

Answer 4

        UIUserNotificationType allNotificationTypes =
        (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);

        UIUserNotificationSettings *settings =
        [UIUserNotificationSettings settingsForTypes:allNotificationTypes categories:nil];
        [[UIAp

plication sharedApplication] registerUserNotificationSettings：settings];

// [[UIApplicationsharedApplication] registerForRemoteNotifications];

        if ([[UIApplication sharedApplication] respondsToSelector:@selector(currentUserNotificationSettings)]) {


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

            if (types == UIUserNotificationTypeNone) {



            [_TransparentView setBackgroundColor:[[UIColor clearColor] colorWithAlphaComponent:0.8]];


              lblDescription.text=@"Please enable notifications from settings.";
            }

        }
    }

Answer 5

试试这段代码。它适用于iOS 8.0以后版本。

 if (([[[UIDevice currentDevice] systemVersion] compare:8.0 options:NSNumericSearch] != NSOrderedAscending)) {
    if (![[UIApplication sharedApplication] isRegisteredForRemoteNotifications])
    {
        DisplayAlert(@"Please enable Permission from Settings->App Name->Notifications->Allow Notifications");
        return;
    }
}
else{
    UIRemoteNotificationType status = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
    if (status == UIRemoteNotificationTypeNone)
    {
        DisplayAlert(@"Please enable Permission from Settings->App Name->Notifications->Allow Notifications");
        return;
    }
}

提醒用户从ios中的设置启用通知

5 个答案: