iOS(obj-c)のセグエの戻り(push)
Page content
1つ前の画面に戻る
[self.navigationController popViewControllerAnimated:YES];
ルート画面まで一気に戻る
[self.navigationController popToRootViewControllerAnimated:YES];
任意の画面(UIViewController)まで戻る
[self.navigationController popToViewController:UIViewController animated:YES];