iOS Button not clickable during animation - ios

Question

When I added animation to my button using a category method, then I can't click that button, seems it is disabled:
[_compassCalibrateButton pulse:1.5 continuously:YES];
_compassCalibrateButton.userInteractionEnabled=YES;
I have a UIView category contatining this :
- (void)pulse:(float)secs continuously:(BOOL)continuously {
[UIView animateWithDuration:secs/2
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
// Fade out, but not completely
self.alpha = 0.3;
}
completion:^(BOOL finished) {
[UIView animateWithDuration:secs/2
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
// Fade in
self.alpha = 1.0;
}
completion:^(BOOL finished) {
if (continuously) {
[self pulse:secs continuously:continuously];
}
}];
}];
}

Answer 1

From the doc
During an animation, user interactions are temporarily disabled for
the views being animated. (Prior to iOS 5, user interactions are
disabled for the entire application.) If you want users to be able to
interact with the views, include the
UIViewAnimationOptionAllowUserInteraction constant in the options
parameter.
So your code should be
- (void)pulse:(float)secs continuously:(BOOL)continuously {
[UIView animateWithDuration:secs/2
delay:0.0
options:UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction
animations:^{
// Fade out, but not completely
self.alpha = 0.3;
}
completion:^(BOOL finished) {
[UIView animateWithDuration:secs/2
delay:0.0
options:UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction
animations:^{
// Fade in
self.alpha = 1.0;
}
completion:^(BOOL finished) {
if (continuously) {
[self pulse:secs continuously:continuously];
}
}];
}];
}

Answer 2

I tested on Swift 4
UIView.animate(withDuration: 0.8, delay: 0, options: [.repeat, .autoreverse, .allowUserInteraction], animations: {
// Do Something
}, completion: nil)

Answer 3

Try this it will help you
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint touchLocation = [touch locationInView:self.view];
for (UIButton *button in self.arrBtn)
{
if ([button.layer.presentationLayer hitTest:touchLocation])
{
// This button was hit whilst moving - do something with it here
[button setBackgroundColor:[UIColor cyanColor]];
NSLog(#"Button Clicked");
break;
}
}
}

Answer 4

Note that if you are animating a UIButton to fade out after a while, e.g.:
[UIView animateWithDuration:1.0 delay:3.0 options:|UIViewAnimationOptionAllowUserInteraction animations:^{
self->btn.alpha = 0;
} completion:nil];
It will be unresponsive from the very start, regardless your 'delay', due to the final alpha. One way around this is something like:
[UIView animateWithDuration:1.0 delay:3.0 options:UIViewAnimationOptionAllowUserInteraction animations:^{
self->btn.alpha = 0.1;
} completion:^(BOOL finished){self->btn.alpha = 0;}];