如何在 ios 10 中处理后台推送通知？

Question

我不会在后台处理推送通知。

按照以下步骤在后台处理推送通知：-

在功能 -> 启用远程通知中。
在功能 -> 后台模式 -> 启用远程通知。
在 didFinishLaunchingWithOptions 中给予 ios 10.
用于推送通知UNUserNotificationCenter。

App 在前台，然后推送通知工作正常，下面的方法调用：

userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler

但我的问题是应用程序在后台然后不调用任何 method.so 任何人有关于在后台处理推送通知的想法或解决方案 ios 10 那么请帮助我。

谢谢。

Answer 1

willPresentNotification 在应用程序处于前台时调用。查看他们的文档

 - (void)userNotificationCenter:(UNUserNotificationCenter *)center
       willPresentNotification:(UNNotification *)notification
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler {
    // The method will be called on the delegate only if the application is in the foreground.
    // If the method is not implemented or the handler is not called in a timely manner then the notification will not be presented.
    // The application can choose to have the notification presented as a sound, badge, alert and/or in the notification list.
    // This decision should be based on whether the information in the notification is otherwise visible to the user.

}

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
         withCompletionHandler:(void(^)())completionHandler {
    // The method will be called on the delegate when the user responded to the notification by opening the application,
    // dismissing the notification or choosing a UNNotificationAction.
    // The delegate must be set before the application returns from applicationDidFinishLaunching:.

}

尝试签到didReceiveNotificationResponse你会得到你需要的。

ALSO 如果需要获取任何数据或任何处理，请在后台模式下启用后台获取并使用以下方法

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(nonnull void (^)(UIBackgroundFetchResult))completionHandler{

    completionHandler(UIBackgroundFetchResultNewData);
}

根据应用程序状态处理 APNS

   if(application.applicationState == UIApplicationStateInactive)
     {
        /* 
        # App is transitioning from background to foreground (user taps notification), do what you need when user taps here!
         */    
    }
    else if(application.applicationState == UIApplicationStateActive)
    {
        /*
         # App is currently active, can update badges count here
       */
    }
    else if(application.applicationState == UIApplicationStateBackground)
    {
        /* # App is in background, if content-available key of your notification is set to 1, poll to your backend to retrieve data and update your interface here */
    }

Answer 2

这是我的解决方案：

{  
    "aps" : {  
        "content-available" : 1  
    },  
    "acme1" : "bar",  
    "acme2" : 42  
}

重要的是把content-available设为1。

Answer 3

收到包含 alert 键的推送通知后，iOS 将向用户显示通知。如果用户与警报交互，您的应用程序将启动到前台模式。

静默通知是包含 content-available 键的推送通知。这些通知不会呈现给用户，并且不能包含 alert、sound 或 badge 键。当 iOS 发出静默通知时，您的应用程序将启动到后台模式。应用程序可以在后台执行非常有限的工作以响应静默通知。

静默通知如下所示：

{
    "aps" : {
        "content-available" : 1
    },
    "com.yourcompany.something.something" : "something"
}

交付后，将调用应用程序委托方法 application:didReceiveRemoteNotification:fetchCompletionHandler:。您对该方法的实现有 30 秒的时间来调用在 fetchCompletionHandler 参数中传递的块。

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler {  
    completionHandler(UIBackgroundFetchResultNoData);
    return;
}

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