当应用程序在后台运行时，推送通知不起作用

Question

There's a problem with my app and I don't know why: notification with Firebase doesn't work when the app is in the background, but they are fired once the app goes in the foreground. The problem is not how to handle them, but why when the app is in foreground notification popup are fired, but when are in the background not.

{ 
 "notification" : {
  "title" : "...",
  "body" : "...",
  "icon" : "...",
  "sound" : "default"
},
"to": "...",
  "priority" : "high",
"data" : {
   ...
}
}

This is a sample of the notification I tried to fire with the postman. Any ideas? Thanks

Answer 1

1) Check your certificate and bundle identifier in Firebase.

2) Make sure you send Device Token to Firebase.

- (void)application:(UIApplication *)application
   didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {

// For Development
    [FIRInstanceID instanceID] setAPNSToken:deviceToken type:FIRInstanceIDAPNSTokenTypeSandbox];

// For Production
    [FIRInstanceID instanceID] setAPNSToken:deviceToken type: FIRInstanceIDAPNSTokenTypeProd];

    }

You can checkout this Link for more information.

Answer 2

签入功能您已在后台模式下打开了远程通知。