从应用程序注销后如何取消订阅 FCM 通知? [英] How to unsubscribe from FCM notifications after logout from app?

问题描述

我已经在我的应用中实现了 Firebase 云消息以用于推送通知.一切正常.但是通知甚至让用户从应用程序中注销.

I have implemented Firebase cloud messaging in my app for push notifications. Everything working fine. But notifications are getting even user logged out from app.

听说，我需要在用户退出应用时删除 FCM 令牌.

I heard that, I need to delete the FCM token when user logged out from app.

所以我在注销方法中这样做了:

So I did like this in logout method:

-(void)logout{
        [[FIRInstanceID instanceID] deleteIDWithHandler:^(NSError *error){
            NSLog(@"%@",error);
        }];
}

但这不起作用，下次用户登录时 [[FIRInstanceID instanceID]token] 会以 null 的形式出现.

But this is not working and next time when user logged in [[FIRInstanceID instanceID]token] is coming as null.

如何做到这一点?

推荐答案

您可以删除令牌，但最好直接取消订阅.如何做到这一点，取决于您最初订阅更新的方式.

You can delete the token, but it's better to simply cancel the subscription. How to do that, depends on how you subscribed to the updates in the first place.

如果您订阅了某个主题，你会想要取消订阅当用户退出时.

If you subscribed to a topic, you'll want unsubscribe when the user signs out.

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