双击UIview时隐藏导航栏

3 回答

• 0

  UITapGestureRecognizer* tapGesture =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(your_selector)];
  tapGesture.numberOfTapsRequired = 2;
  [self.view addGestureRecognizer:tapGesture];
  [tapGesture release];
  

  在你的选择器中：

  -(void)your_selector{
      [UIView animateWithDuration:0.5
                   animations:^{
                       bar.frame = CGRectOffset(bar.frame, 0, bar.bounds.size.height*bar.frame.origin.y<0?-1:1);
                   }];
  }
  

  在此实现中，您只有双触事件，它会将bar的状态更改为反向 . 不幸的是，单一和双触摸手势在某一时刻并不容易实现 . 更多的人类行为，对你而言也很容易 - 只有双重触摸才能工作 .

  XCode project - example

  回复于 2024-05-06T05:00:15+08:00
• 0

  你可以拥有一个没有导航控制器的 UINavigationBar ：

  navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 40.0f)];
  [navBar setDelegate:self];
  [mainView addSubview:navBar];
  

  UITapGestureRecognizer 是 UIGestureRecognizer 的具体子类，用于查找单个或多个分接头：

  UITapGestureRecognizer *doubleTap =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideNavBar:)];
  [doubleTap setNumberOfTapsRequired:2];
  [YOURVIEW addGestureRecognizer:doubleTap];
  
  UITapGestureRecognizer *singleTap =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showNavBar:)];
  [singleTap setNumberOfTapsRequired:1];
  [YOURVIEW addGestureRecognizer:singleTap];
  

  以下是显示或隐藏导航栏的方法：

  - (void)hideNavBar:(id)sender 
  {
      [UIView beginAnimations:nil context:NULL];
      [UIView setAnimationDuration:1.0f]; //Animation duration in seconds
  
      navBar.alpha = 0.0f;
  
      [UIView commitAnimations];
  }
  
  - (void)showNavBar:(id)sender 
  {
      [UIView beginAnimations:nil context:NULL];
      [UIView setAnimationDuration:1.0f]; //Animation duration in seconds
  
      navBar.alpha = 1.0f;
  
      [UIView commitAnimations];
  }
  

  回复于 2024-05-06T05:00:15+08:00
• 0

  试试这个隐藏

  [UIView beginAnimations:@"Hide bar animation" context:NULL];
  
  [UIView setAnimationDuration:0.5];
  
  navigationBar.alpha = 0.0;
  
  [UIView commitAnimations];
  
  for showing
  
  [UIView beginAnimations:@"Show bar animation" context:NULL];
  
  [UIView setAnimationDuration:0.5];
  
  navigationBar.alpha = 1.0;
  
  [UIView commitAnimations];
  

  但是使用UINavigationController它太容易了......

  回复于 2024-05-06T05:00:15+08:00