存储多对令牌/设备用于推送通知

Question

I'm working on a new app and I want to give the possibility to my user to use more then one device. The app can receive push notification, my question is how to save more device/token for each user, this for send push notification to all the user's devices.

My idea is to retrive "some device ID" and then store a id/token for each device but I don't know which device ID I can use...

Another idea is to create a random id the first time and then send this id with token, this work (partially) until the user clear application data...in this case I need to resend a new id (no problem) but I can't know if I can remove the old id/token

any solution?

Answer 1

You don't need "some device ID"; the push token is the device ID. You need to ensure that your backend database can associate more than one push token with a given user account. This is typically through a one->many relationship between user "users" table and your "installations" table.

You can't rely on your app to tell your backend to remove an old token, since the user may simply delete your app and it doesn't get a chance to communicate with your back-end.

The APNS service will deliver feedback as to which push tokens were invalid (I assume that the equivalent Android service also has something like this). You use this feedback to purge invalid installations from your installations table.