我怎么知道，如果用户没有允许推送通知 [英] How do I know if user didn't allow push notifications

问题描述

我看了<一个href=\"http://stackoverflow.com/questions/19704501/what-is-the-callback-method-if-you-click-dont-allow-in-push-notification-popu\">this问题但如果有一个明确的答案不明白。

I saw this question but didn't understand if there is a clear answer.

我可以告诉大家，如果用户pressed不允许的第二次发射的应用程序通过设置一个标志：

I can tell if the user pressed "don't allow" on the SECOND launch of the app by setting a flag:

BOOL didRequest = [[NSUserDefaults standardUserDefaults] boolForKey:@"DidRequestPushNotifications"];
    UIRemoteNotificationType types =    [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
    if (types == UIRemoteNotificationTypeNone && didRequest)
    {
        [self showAlertToUserToEnableRemoteNotificationsOnDeviceInSettings];
    }
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"DidRequestPushNotifications"];
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];

但对于首批推出的应用程序 - 对成功和失败两种委托方法不叫，这意味着，有没有办法知道肯定

But for the first launch of the app - both delegate methods for success and failure aren't called and that means that there is no way to know for sure.

任何变通？

推荐答案

在除已链接的答案，一个工作，我身边能想到的是，一旦用户成功注册了推，可以存储在设备令牌 NSUserDefaults的。

In addition to the answer you have linked, a work around I can think of is, once user successfully registered for pushes, You can store the device token in the NSUserDefaults.

这样你可以检查用户设置的值无或没有。

This way you can check if the value of that user setting is nil or not.

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