我有同样的问题。我不是 IOS 开发人员，但我是 ac# 开发人员。iOS 开发人员给了我配置文件，以便在我们正在运行的 Windows 服务中发送推送通知。我只用我的 iPad 测试了 PushSharp，但它不起作用。我收到错误消息：
推送通知失败：PushSharp.Core.MaxSendAttemptsReachedException：已达到发送通知的最大发送尝试次数！
我已经在本地和服务器上尝试过，我只是想发送 1 次推送。
代码。
var appleCertificate =
File.ReadAllBytes(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "sb_push.p12"));
var push = new PushBroker();
/* push.OnNotificationSent += NotificationSent;
push.OnChannelException += ChannelException;
push.OnServiceException += ServiceException;
push.OnNotificationFailed += NotificationFailed;
push.OnDeviceSubscriptionExpired += DeviceSubscriptionExpired;
push.OnDeviceSubscriptionChanged += DeviceSubscriptionChanged;
push.OnChannelCreated += ChannelCreated;
push.OnChannelDestroyed += ChannelDestroyed;
push.OnNotificationSent += NotificationSent;*/
push.OnNotificationFailed += NotificationFailed;
push.RegisterAppleService(new ApplePushChannelSettings(appleCertificate, "PASSWORD!"));
push.QueueNotification(new AppleNotification()
.ForDeviceToken(deviceToken)
.WithAlert(message)
.WithSound("default"));