我还没有找到任何正式的Apple文档，该文档讨论了针对旧iOS版本以及iOS 10正确实现推送通知的问题。我所看到的独立教程同样涵盖了单个iOS版本。
我看到iOS 10的官方文档： Local and Remote Notifications Overview但它没有评论支持早期的iOS版本。
iOS 9教程： Push Notifications Tutorial - Ray Wenderlich
我看到各种stackoverflow线程，关于人们为了让旧解决方案在新版本上工作而必须做出的改变：
Push notifications are not working in iOS 9 这显示了处理6 - 9的代码。
didReceiveRemoteNotification not called , iOS 10
但是我没看到的是，从今天开始（使用iOS 10）是正确的，但也支持旧设备。 ** 更新 ** App Store表示只有6％的设备下载应用程序比ios 9旧，所以如果更容易支持9 + 10，我就会这样做。
（我尝试从iOS 10示例开始，但它立即在iOS 9.3仿真设备上崩溃，虽然它在iOS 10中运行良好。所以我得出结论，我应该从正确设置不同版本的信息开始。我可以发布该代码，但我认为这导致了这个线程的方向错误。我宁愿从“应该”在iOS的多个版本上工作开始，包括10个。）
如果我找不到某些解决方案，我将开始合并来自不同stackoverflow代码片段的代码......但是说真的吗？我必须遗漏一些东西，因为大概每个iOS开发人员都有这个问题。
相反，我可以从较旧的示例开始，然后按照更改将其与iOS 10配合使用 - 但是它会充分利用iOS 10吗？
注意：我正在使用Xamarin C＃编程，但Objective-C或Swift的答案同样有用。
答案 0 :(得分：4)
这是Xamarin C＃代码（与Objective-C不同的语法和大小写，但我认为它可以逐行转换为Objective-C）。
在iOS 9.3和iOS 10.2上进行测试。
初始化“本地”和“远程”通知：
// "UIApplicationDelegate" is for "local" notifications,
// "IUNUserNotificationCenterDelegate, IMessagingDelegate" for "remote" notifications.
public class AppDelegate : UIApplicationDelegate,
IUNUserNotificationCenterDelegate, IMessagingDelegate
{
...
public override bool FinishedLaunching( UIApplication application, NSDictionary launchOptions )
{
...
RegisterForOurRemoteNotifications( this );
RegisterForOurLocalNotifications();
...
}
...
// --- Comment out if not using Google FCM. ---
public override void RegisteredForRemoteNotifications( UIApplication application, NSData deviceToken )
{
//base.RegisteredForRemoteNotifications( application, deviceToken );
Firebase.InstanceID.InstanceId.SharedInstance.SetApnsToken( deviceToken,
Firebase.InstanceID.ApnsTokenType.Sandbox );
}
...
// ----- "static"; Could be in another class. -----
// These flags are for our convenience, so we know initialization was done.
static bool IsRegisteredForNotifications;
static bool IsRegisteredForRemoteNotifications;
// Optional - true when we are using Google "Firebase Cloud Messaging".
static bool HasFCM;
public static void RegisterForOurRemoteNotifications( AppDelegate del )
{
// Google "Firebase Cloud Messaging" (FCM) Monitor token generation
// (Uncomment, if you are using FCM for notifications.)
//InstanceId.Notifications.ObserveTokenRefresh( TokenRefreshNotification );
if (UIDevice.CurrentDevice.CheckSystemVersion( 10, 0 )) {
// iOS 10 or later
var authOptions = UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound;
UNUserNotificationCenter.Current.RequestAuthorization( authOptions, ( granted, error ) => {
Console.WriteLine( granted );
} );
// For iOS 10 display notification (sent via APNS)
UNUserNotificationCenter.Current.Delegate = del;
// For iOS 10 data message (sent via Google FCM).
// (Uncomment, if you are using FCM for notifications.)
// TBD: If NOT using FCM, you may need some other lines of code here.
//Messaging.SharedInstance.RemoteMessageDelegate = del;
} else {
// iOS 9 or before
var allNotificationTypes = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound;
var settings = UIUserNotificationSettings.GetSettingsForTypes( allNotificationTypes, null );
UIApplication.SharedApplication.RegisterUserNotificationSettings( settings );
}
UIApplication.SharedApplication.RegisterForRemoteNotifications();
IsRegisteredForRemoteNotifications = true;
// Uncomment if using Google "Firebase Cloud Messaging" (FCM).
//TokenRefreshNotification( null, null );
//if (UIDevice.CurrentDevice.CheckSystemVersion( 9, 0 )) // Needed to call this twice on iOS 9 for some reason.
// TokenRefreshNotification( null, null );
UIApplication.SharedApplication.SetMinimumBackgroundFetchInterval( UIApplication.BackgroundFetchIntervalMinimum );
}
public static void RegisterForOurLocalNotifications()
{
// --- Our app's notification actions. ---
UNNotificationAction followAction = UNNotificationAction.FromIdentifier( "follow", PS.LocalizedString( "Follow" ), UNNotificationActionOptions.None );
UNNotificationAction likeAction = UNNotificationAction.FromIdentifier( "like", PS.LocalizedString( "Like" ), UNNotificationActionOptions.None );
// ...
// --- Our app's notification categories ---
UNNotificationCategory followCategory = UNNotificationCategory.FromIdentifier( "followCategory", new UNNotificationAction[] { followAction, likeAction },
new string[] { }, UNNotificationCategoryOptions.None );
// ...
// --- All of the app's categories from above ---
var categories = new UNNotificationCategory[] { followCategory /*, ...*/ };
// --- Same for all apps ---
UIUserNotificationSettings settings = UIUserNotificationSettings.GetSettingsForTypes(
UIUserNotificationType.Alert |
UIUserNotificationType.Badge |
UIUserNotificationType.Sound
, new NSSet( categories ) );
UIApplication.SharedApplication.RegisterUserNotificationSettings( settings );
if (UIDevice.CurrentDevice.CheckSystemVersion( 10, 0 )) {
UNUserNotificationCenter.Current.SetNotificationCategories( new NSSet<UNNotificationCategory>( categories ) );
UNUserNotificationCenter.Current.RequestAuthorization( UNAuthorizationOptions.Alert | UNAuthorizationOptions.Sound | UNAuthorizationOptions.Badge,
( result, err ) => {
Console.WriteLine( result.ToString() );
} );
}
IsRegisteredForNotifications = true;
}
}
// -------------------------------------------------------
// --- These are for Google "Firebase Cloud Messaging" ---
// (Comment out if not using FCM.)
public static string Token;
static void TokenRefreshNotification( object sender, NSNotificationEventArgs e )
{
// This method will be fired every time a new token is generated, including the first
// time. So if you need to retrieve the token as soon as it is available this is where that
// should be done.
//var refreshedToken = InstanceId.SharedInstance.Token;
ConnectToFCM( UIApplication.SharedApplication.KeyWindow.RootViewController );
// TODO: If necessary send token to application server.
}
public static void ConnectToFCM( UIViewController fromViewController )
{
Messaging.SharedInstance.Connect( error => {
if (error != null) {
Helper.logD( "Unable to connect to FCM", error.LocalizedDescription );
} else {
//var options = new NSDictionary();
//options.SetValueForKey( DeviceToken, Constants.RegisterAPNSOption );
//options.SetValueForKey( new NSNumber( true ), Constants.APNSServerTypeSandboxOption );
//InstanceId.SharedInstance.GetToken("", InstanceId.ScopeFirebaseMessaging
Token = InstanceId.SharedInstance.Token;
Console.WriteLine( $"Token: {InstanceId.SharedInstance.Token}" );
HasFCM = true;
}
} );
}
// ------------------ End Google FCM ---------------------
// -------------------------------------------------------
}
以上代码初始化您的应用，以便它可以接收通知。
重要提示：您还需要在应用中设置适当的权限;请参阅Apple文档或问题中提到的链接。你需要这个文件：
Entitlements.plist：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>aps-environment</key>
<string>development</string>
</dict>
</plist>
<string>必须包含“开发”或“生产”。 （我不知道我们的应用仍然在这里说“开发”的重要性;我还没有检查是什么构建的，看它是否在提交给Apple之前被Xcode自动更改为“生产”。根据{{3}它确实。）
然后您需要代码发送 [例如您的应用告诉您的服务器通知您朋友的设备您现在正在做什么]并接收本地或远程通知。在我们的应用中，该代码与我们的特定通知操作和类别相结合;我没有时间提取一个简洁的版本发布在这里。有关详细信息，请参阅Apple文档或原始问题中提到的链接。
以下是接收通知的基本方法（上面添加到class AppDelegate）：
public override void ReceivedLocalNotification( UIApplication application, UILocalNotification notification )
{
...
}
public override void DidReceiveRemoteNotification( UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler )
{
...
}
[Export( "userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:" )]
public void DidReceiveNotificationResponse( UNUserNotificationCenter center, UNNotificationResponse response, Action completionHandler )
{
...
}
您可能需要/需要覆盖或实现的其他方法（另请参阅上面class AppDelegate上声明的接口）;其中一些可能是FCM特有的：
ApplicationReceivedRemoteMessage
ReceivedRemoteNotification
WillPresentNotification
PerformFetch (for background notifications)
HandleAction