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我遇到同樣的問題。我不是一名IOS開發人員，但我是一名c＃開發人員。 iOS開發人員向我提供配置文件，以便在運行的Windows服務中發送推送通知。我用我的iPad測試了PushSharp，但沒有奏效。我收到錯誤消息：發送IOS推送通知的PushSharp錯誤消息
推送通知失敗：PushSharp.Core.MaxSendAttemptsReachedException：達到發送通知的最大嘗試次數！
我已經嘗試過本地和服務器上，我只是試圖發送1推。
代碼。
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"));