iOS 4从后台恢复 [英] iOS 4 resume from background

问题描述

当用户打开应用程序时，可能会收到通知或其他内容，但应用程序在后台（因此未关闭）？

It is possible to get a notification or something when the user opens the application, but the application was in the background (so it wasn't closed)?

推荐答案

您的App Delegate将在返回之前调用其功能 applicationWillEnterForeground 。

Your App Delegate will have its function applicationWillEnterForeground called before coming back.

此外，操作系统将会如果在这些事件被解冻时冻结，则排队等待一系列重大操作系统更改的潜在通知，即： UIApplicationSignificantTimeChangeNotification 和 UIDeviceBatteryLevelDidChangeNotification

Also, the OS will have queued a series of potential notifications for significant OS changes if it were freeze dried when those events were fired, ie: UIApplicationSignificantTimeChangeNotification and UIDeviceBatteryLevelDidChangeNotification

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