iOS实战之导航栏

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NavigationBarHidden:NO animated:YES]; }

方法二：（使用代理）

//UINavigationControllerDelegate

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{ 
  BOOL isHiddenNavBar = [viewController isKindOfClass:[self class]]; 
  [self.navigationController set

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