IOS IOS 8 的远程通知无法在后台运行

Question

我一直在使用 Xamarin.IOS，我最近遇到了当 Iphone/Ipad 在后台时尝试接收远程通知负载的问题。 IOS 7 台设备在后台或前台似乎都在工作。但是，对于 IOS 8 台设备，仅当触摸警报横幅时才会调用 DidReceiveRemoteNotification。当未触及警报横幅且应用程序处于后台时，我需要能够获取有效负载。为什么 IOS 7 的远程通知在后台工作，但 IOS 8 的远程通知不在后台工作。我可能做错了什么？

if (UIDevice.CurrentDevice.SystemVersion [0] >= '8')
    {
        UIUserNotificationType types = UIUserNotificationType.Badge | UIUserNotificationType.Sound | UIUserNotificationType.Alert;
        UIUserNotificationSettings settings = UIUserNotificationSettings.GetSettingsForTypes (types, null);
        UIApplication.SharedApplication.RegisterUserNotificationSettings (settings);
    }
    else
    {
        UIRemoteNotificationType notificationTypes = UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge |                                                      
        UIRemoteNotificationType.Sound;
        UIApplication.SharedApplication.RegisterForRemoteNotificationTypes (notificationTypes);
    }

Answer 1

如果版本为 iOS 8 或更高版本，您需要调用 RegisterForRemoteNotifications 方法，如下所示：

if (UIDevice.CurrentDevice.SystemVersion [0] >= '8')
{
    UIUserNotificationType types = UIUserNotificationType.Badge | UIUserNotificationType.Sound | UIUserNotificationType.Alert;
    UIUserNotificationSettings settings = UIUserNotificationSettings.GetSettingsForTypes (types, null);
    UIApplication.SharedApplication.RegisterUserNotificationSettings (settings);
    UIApplication.SharedApplication.RegisterForRemoteNotifications();
}

IOS IOS 8 的远程通知无法在后台运行

IOS remote notifications not working in background for IOS 8

c#

xamarin.ios

ios

xamarin

ios8