在我的代码中,我如何检测到用户已从保存的状态恢复？我可以附加特定的iOS4多任务NSNotification吗？
也可以看看：
> applicationWillEnterForeground vs. applicationDidBecomeActive,applicationWillResignActive vs. applicationDidEnterBackground> Handling applicationDidBecomeActive – “How can a view controller respond to the app becoming Active?”
