Hide navigation bar when double click on UIview - iphone

Question

How to hide the navigationBar on double tap and show on single tap on UIView without using the navigation controller? And also the animations when hiding and showing?
Thanks in advance.

Answer 1

UITapGestureRecognizer* tapGesture =[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(your_selector)];
tapGesture.numberOfTapsRequired = 2;
[self.view addGestureRecognizer:tapGesture];
[tapGesture release];
In your selector:
-(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);
}];
}
In this implementation you have only double-touch event that will change status of bar to reverse.
Unfortunately there are no easy implementation for single and double touché gestures at one moment. Much more human behavior and easy for you - work only with event of double touch.
XCode project - example

Answer 2

You can have a UINavigationBar without a navigation controller:
navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 40.0f)];
[navBar setDelegate:self];
[mainView addSubview:navBar];
UITapGestureRecognizer is a concrete subclass of UIGestureRecognizer that looks for single or multiple taps:
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];
Here are the methods that show or hide the navigation bar:
- (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];
}

Answer 3

try this for hiding
[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];
but with UINavigationController it's too easy...