终止后启动带有推送通知的应用程序 [英] Launch an app with push notification after it has been terminated
问题描述
我想知道是否有一种方法可以唤醒已在ios8-9上被用户终止的应用程序.终止是指双击主页按钮并向上滑动.
I was wondering if there was a way to wake up an app that has been terminated by the user on ios8-9. By terminated I mean double click on the home button and swipe up.
是否可以通过发送无声推送通知来启动应用程序，从而触发didreceiveremotenotification并给我一些运行时间?
Is it somehow possible to launch an app by sending a silent push notification so that didreceiveremotenotification gets fired and gives me some runtime ?
我注意到有相当一部分用户终止了我的应用程序.由于我非常依赖于后台获取，因此这是一个问题.我的想法是发送无声推送通知，以在后台启动应用程序并触发后台获取.
I have noticed that a fair share of my users terminate my app. As I rely heavily on background fetch, this a problem. My idea was to send silent push notifications to launch the app in the background and trigger background fetch.
推荐答案
简短答案:否这是不可能的.
详细信息:
当服务器上有任何新内容时，您将向应用程序发送远程通知以进行通知. (远程通知实际上只是设置了content-available标志的普通推送通知)
When there is any new content on server you will send Remote Notification to your application to inform about that. (A Remote Notification is really just a normal Push Notification with the content-available flag set)
应用程序收到此远程通知时，它将调用以下方法:
When application received this Remote Notification it calls following method:
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))handler
此方法的文档中清楚地写着:
In Documentation of this method it is clearly written:
但是，如果用户 强制退出了.在这种情况下，用户必须重新启动您的应用 或在系统尝试启动您的应用程序之前重新启动设备 再次自动.
However, the system does not automatically launch your app if the user has force-quit it. In that situation, the user must relaunch your app or restart the device before the system attempts to launch your app automatically again.
参考:
- objc.io: Remote Notifications
- Apple Doc about application:didReceiveRemoteNotification:fetchCompletionHandler:
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