iOS Allowing one touch event at one given time - ios

Question

I am using iOS 5 to implement an app.
In this app I have 4 button, each button triggers an animation to unhide a UIView. However, if I press a button and then another, the view that appeared first should disappear and the view for the new button would appear.
I have this working so far. But if the user taps two buttons rapidly it will display the two views. How can I insure that only once touch event is processed?
The action for the button is something like:
- (void)buttonPressed:(id)sender
{
MenuButton *aButton = (MenuButton *)sender;
switch (aButton.tag) {
case 0:
if (displayingView && currentlyDisplayingView != picker1)
[self toggleView:currentlyDisplayingView atIndex:currentIndex];
[self toggleView:picker1 atIndex:aButton.tag];
currentlyDisplayingView = picker1;
currentIndex = aButton.tag;
break;
case 1:
if (displayingView && currentlyDisplayingView != picker2)
[self toggleView:currentlyDisplayingView atIndex:currentIndex];
[self toggleView:picker2 atIndex:aButton.tag];
currentlyDisplayingView = picker2;
currentIndex = aButton.tag;
break;
case 2:
if (displayingView && currentlyDisplayingView != picker3)
[self toggleView:currentlyDisplayingView atIndex:currentIndex];
[self toggleView:picker3 atIndex:aButton.tag];
currentlyDisplayingView = picker3;
currentIndex = aButton.tag;
break;
default:
break;
}
NSLog(#"Pressed %#",[buttonNames objectAtIndex:aButton.tag]);
}
And the animation code:
- (void)toggleView:(UIView *)picker
atIndex:(NSInteger)index
{
if (picker) {
picker.hidden = NO;
[UIView animateWithDuration:0.5
animations:^{
picker.alpha = abs(picker.alpha - 1);
CGRect rect = picker.frame;
if (rect.size.height == 0){
rect.size.height = 76;
} else if (rect.size.height == 76) {
rect.size.height = 0;
}
picker.frame = rect;
for (int i = index+1; i < [viewButtons count]; i++) {
UIButton *aButton = [viewButtons objectAtIndex:i];
CGRect frame = aButton.frame;
if (rect.size.height == 0){
frame.origin.y -= 75;
} else if (rect.size.height == 76) {
frame.origin.y += 75;
}
aButton.frame = frame;
}
}
completion:^(BOOL success){
if (picker.alpha == 0){
picker.hidden = YES;
} else if (picker.alpha == 1) {
picker.hidden = NO;
}
displayingView = !displayingView;
}];
}
}

Answer 1

Call beginIgnoringInteractionEvents before calling animateWithDuration, and call endIgnoring... in the completion handler.