Possible to change AppDelegate at runtime

问题

Is it possible to change the UIApplication.delegate property at runtime to another class that implements the UIApplicationDelegate protocol so that from then on UIApplicationDelegate functions are called on the new class?

回答1:

You can very simply change it with [UIApplication sharedApplication].delegate = instanceOfDifferentClass.

来源：https://stackoverflow.com/questions/28464515/possible-to-change-appdelegate-at-runtime