Question

我正在构建基于文章的应用程序，我在我的应用程序中有标签栏和导航栏。我想要做的是当我点击该视图时我的文章正在显示，标签栏和导航栏应该隐藏，反之亦然。请帮帮我

感谢您的回复，最后我使用了手势方法

UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]

initWithTarget:self action:@selector(handleDoubleTap)];

doubleTap.numberOfTapsRequired =1;

[scrollView addGestureRecognizer:doubleTap];

[doubleTap release];   - (void)handleDoubleTap {


NSLog(@"Single tap");
 if(firstTime)
 {
[UIView beginAnimations: @"moveField"context: nil];
[UIView setAnimationDelegate: self];
[UIView setAnimationDuration: 0];
[UIView setAnimationCurve: UIViewAnimationCurveEaseInOut];

[self.navigationController setNavigationBarHidden:YES animated:YES];
scrollView.frame = CGRectMake(0,0,320,460.0f);
tabBar.hidden=YES;
[self.view bringSubviewToFront:scrollView];
[UIView commitAnimations];
     firstTime=NO;
 }
else {
    [UIView beginAnimations: @"moveField"context: nil];
    [UIView setAnimationDelegate: self];
    [UIView setAnimationDuration: 0];
    [UIView setAnimationCurve: UIViewAnimationCurveEaseInOut];
    //[self.view bringSubviewToFront:scrollView];
    [self.navigationController setNavigationBarHidden:NO animated:YES];
    scrollView.frame = CGRectMake(0.0, 0.0, 320, 372);
    tabBar.hidden=NO;

    [UIView commitAnimations];
    firstTime=YES;
}

现在，当我点击屏幕时，我得到了这个...当我滚动视图时可以隐藏标签栏和导航栏，反之亦然....请帮助我

Answer 1

使用一个BOOL变量，我在.h文件中将其称为firstTime

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
   if(firstTime)
  {
   [self.navigationController hidesBottomBarWhenPushed];
   firstTime=FALSE; 
   self.navigationController.navigationBar.hidden=TRUE;
  } 
else
{
   [self.navigationController hidesBottomBarWhenPushed];
   firstTime=TRUE;
   self.navigationController.navigationBar.hidden=FALSE;
}
}

- (BOOL)hidesBottomBarWhenPushed
{
  if(firstTime)
 {
   return TRUE;
 }
 else
 {
   return FALSE;
 }
}

这会在单击时隐藏Tabbar和NavigationBar，反之亦然

Answer 2

int DEF_BAR_HEIGHT = 40;

-(void)hideBars:(bool)value
    {
        // hide navigation bar
        [self.navigationController setNavigationBarHidden:value animated:YES];

       //hide tabBar
       CGRect viewFrame = view.frame;
       viewFrame.size.height += value ? DEF_BAR_HEIGHT : -DEF_BAR_HEIGHT; // Change this to the height of the tab bar
       [UIView beginAnimations:nil context:nil];
       [UIView setAnimationDuration:0.75];

       view.frame = viewFrame;

       [UIView commitAnimations];

    }

我不确定DEF_BAR_HEIGHT值。尝试40或40加导航栏高度。

如何在视图上轻触时隐藏标签栏和导航栏

2 个答案: