iphone - 检测应用程序是否由于 UILocalNotification 获得焦点

Question

我正在制作一个应用程序，用于跟踪一些按照用户定义的时间间隔重复的提醒。

我已经做到了，当警报显示时，操作标题显示“更新”。当您单击此按钮时，应用程序将打开，在这里我想创建下一个提醒，但问题是我不知道应用程序打开是因为点击了通知按钮，还是在应用程序运行时触发了通知。

有人有什么想法吗？

Answer 1

执行此操作的“正确”方法是在委托(delegate)的 application:didReceiveRemoteNotification: 方法中检查 NSApplication 的 applicationState 属性。

来自documentation用于处理本地通知:

iOS Note: In iOS, you can determine whether an application is launched as a result of the user tapping the action button or whether the notification was delivered to the already-running application by examining the application state. In the delegate’s implementation of the application:didReceiveRemoteNotification: or application:didReceiveLocalNotification: method, get the value of the applicationState property and evaluate it. If the value is UIApplicationStateInactive, the user tapped the action button; if the value is UIApplicationStateActive, the application was frontmost when it received the notification.

这与您使用 applicationWillEnterForeground 和 applicationDidBecomeActive 中设置的标志的解决方案类似，但具有系统支持。