iphone - 我们如何检查被用户或 iOS 杀死的 ios 应用程序

Question

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Answer 1

如果您的应用程序处于挂起状态，那么无论是谁终止了应用程序 iOS 或用户，都不会调用 applicationWillTerminate。

您的 applicationWillTerminate 只会在您的应用程序处于后台并且被终止(由 iOS 或用户)时调用，术语后台意味着它在后台运行而不是挂起状态。

刚刚阅读this reference

applicationWillTerminate:—Lets you know that your app is being terminated. This method is not called if your app is suspended.

这是各种状态的表格

Background - The app is in the background and executing code. Most apps enter this state briefly on their way to being suspended. However, an app that requests extra execution time may remain in this state for a period of time. In addition, an app being launched directly into the background enters this state instead of the inactive state. For information about how to execute code while in the background, see Background Execution.