如何在其他类上处理navigationController

Question

我有这样的课程

DrillDownAppAppDelegate.h PictureCell.h RootViewController.h SlideShowViewController.h

DrillDownAppAppDelegate.m PictureCell.m RootViewController.m SlideShowViewController.m

当我点击屏幕时，我想隐藏我的导航栏，在类SlideShowViewController中 但它不起作用 我的代码是

[self.navigationController setNavigationBarHidden：YES animated：YES];

Answer 1

假设RootViewController是UINavigationController堆栈上的可见视图控制器，只需按正常方式推送SlideShowViewController，但是在SlideShowViewController中，包含以下代码：

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [self.navigationController setNavigationBarHidden:YES animated:animated];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear];
    [self.navigationController setNavigationBarHidden:NO animated:animated];
}