Parse.com在用戶登錄後註冊推送通知

Question

我知道要註冊Parse.com推送通知，我必須將它全部設置在appdelegate文件中。但我想知道是否可以在用戶登錄ViewController類後覆蓋頻道並註冊到多個頻道。

Answer 1

您應該可以通過執行以下操作。

if(![currentInstallation channels]) { 

    [currentInstallation setChannels:@[@"WHATEVER1", @" WHATEVER2"]]; 
    NSLog(@"Set Channel"); 
} else { 

[currentInstall addUniqueObject:@"objectone" forKey:@"channels"]; 
[currentInstall addUniqueObject:@"objecttwo" forKey:@"channels"]; 
} [currentInstall saveInBackgroundWithBlock:(BOOL succeeded, NSError *error) { 

if(!error){ 
    NSLog(@"subscribed user to both channels"); 
} else { 
    NSLog(@"error subscribing to both channels: %@", error); 
} 
}]; 

Answer 2

您只需在應用程序中的任意位置運行UIApplication的共享實例，然後調用註冊方法即可。就像這樣：

let application = UIApplication.sharedApplication() 
    let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge], categories: nil) 
    application.registerUserNotificationSettings(settings) 
    application.registerForRemoteNotifications() 

這將顯示推送通知對話框，詢問是否要允許通知，然後撥打電話回任didFailToRegisterForRemoteNotificationsWithError或didRegisterForRemoteNotificationsWithDeviceToken

適當應用的委託方法如果您正在測試上一個模擬器，而不是一個實際的設備didFailToRegisterForRemoteNotificationsWithError將始終被調用。