Question

What I want to do is have the navigation bar hidden at first, and then if the user touches the top of the screen (where it should be) the navigation bar will show for about 1 second or two and disappear.

I tried adding a button that was the same color as the background and then when that is touched show the navigation bar, but that doesn’t seem to be working.

Also how would I do a demo so I could show the user that this works? Thanks!

Answer 1

first hide the navigation bar in the app delegate.then come to the view controller where you want to add the touch event,and use these two methods:

• (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

//mouseSwiped = NO;
CGPoint touchPoint;
//CGPoint touchPointNavigationBar;
UITouch *touch = [touches anyObject];
touchPoint=[touch locationInView:self.view];
if (self.navigationController.navigationBarHidden==YES) {
    if (touchPoint.y<50) {
        self.navigationController.navigationBarHidden=NO;
        timer=[NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(hideNavigationBar) userInfo:nil repeats:NO];  
        [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
    }
}

}

-(void)hideNavigationBar

{

self.navigationController.navigationBarHidden=YES;
if ([timer isValid]) {
    [timer invalidate];
    return;
}

}