将数据传递给AppDelegate [英] Pass data to AppDelegate

问题描述

我想知道如何将数据传回AppDelegate。假设我有这个方案

I wonder how to pass data back to AppDelegate. Let's say I have this scheme

AppDelegate - > RootViewController -> FirstViewController -> SecondViewController.

当调用AppDelegate applicationWillTerminate方法时，SecondViewController具有应保存的数据。我知道我可以使用单例来共享应用程序中的数据，但我不喜欢这种方法。

The SecondViewController have data which should be saved when AppDelegate applicationWillTerminate method is called. I know that I can use singleton to share data in the application but I don't like this approach. Notification seems will not work in this scenario.

你可以推荐我什么？

推荐答案

这个应该得到那个代理。

this should get that delegate.

AppDelegate * delegate =(AppDelegate*) [UIApplication sharedApplication].delegate
[delegate callSomeMethod:someData];

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