Let's say that I have 2 UIViewControllers on a stack within a UINavigationController. In the "parent" we call "[self.navigationController pushViewController:childViewController animated:YES];" upon some user action and in the "child" we call "[self.navigationController popViewControllerAnimated:YES];" upon some user action.Let's say that I have 2 UIViewControllers on a
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iOS:如何识别我们从父UIViewController中的子UIViewController取回的?
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