在iOS 13中使用Xamarin获取设备令牌,通常是为了实现推送通知功能。以下是详细的步骤和示例代码:
设备令牌(Device Token)是Apple Push Notification Service (APNs) 用于识别特定设备的唯一标识符。应用程序需要将此令牌发送到自己的服务器,以便在需要时向该设备发送推送通知。
在Info.plist中添加以下键值对:
<key>UIBackgroundModes</key>
<array>
<string>remote-notification</string>
</array>
在AppDelegate.cs文件中注册远程通知:
using System;
using UIKit;
using UserNotifications;
namespace YourAppNamespace
{
[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate, IUNUserNotificationCenterDelegate
{
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
global::Xamarin.Forms.Forms.Init();
LoadApplication(new App());
// 请求通知权限
UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert | UNAuthorizationOptions.Sound | UNAuthorizationOptions.Badge, (approved, error) => {
if (approved)
{
InvokeOnMainThread(() => UIApplication.SharedApplication.RegisterForRemoteNotifications());
}
});
UNUserNotificationCenter.Current.Delegate = this;
return base.FinishedLaunching(app, options);
}
public override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
{
// 处理设备令牌
string token = BitConverter.ToString(deviceToken.ToArray()).Replace("-", "").ToLowerInvariant();
Console.WriteLine("Device Token: " + token);
// 将token发送到你的服务器
}
public override void FailedToRegisterForRemoteNotifications(UIApplication application, NSError error)
{
Console.WriteLine("Failed to register for remote notifications: " + error.LocalizedDescription);
}
[Export("userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:")]
public void DidReceiveNotificationResponse(UNUserNotificationCenter center, UNNotificationResponse response, Action completionHandler)
{
completionHandler();
}
}
}
RegisteredForRemoteNotifications
方法中正确获取并处理了设备令牌。Console.WriteLine
输出调试信息,检查每一步是否执行成功。通过以上步骤和代码示例,你应该能够在iOS 13中使用Xamarin成功获取设备令牌,并实现推送通知功能。
领取专属 10元无门槛券
手把手带您无忧上云