我有一个包含3个 UIViewController 的 UINavigationController 堆栈。
View A - is the root
View B - is pushed by View A and has `self.navigationItem.hidesBackButton = YES;`
View C - is pushed by View B and has `self.navigationItem.hidesBackButton = NO;`
尽管我将hidesBackButton设置为NO,但视图C仍未显示返回按钮。我该如何解决?