I want to make a button blink using UIAnimation's block style methods, particularly:
animateWithDuration:delay:options:animations:completion
One of the things I think I need to set is the 'AnimationRepeatCount' property - can this be set inside the animation block code like this?
- (void)animateItemWithBlinking:(BOOL)blinking {
__block BOOL isInBlinkState = blinking;
if (!isBlinking)
{
// Start blinking
[UIView animateWithDuration:0.50f
delay:0
options:UIViewAnimationCurveLinear
animations:^{
// Can I call the AnimationRepeat setter here or
// should it be elsewhere outside this block?
[UIView setAnimationRepeatCount:1000];
[UIView setAnimationRepeatAutoreverses:YES];
[button setAlpha:0.0f];
} completion:^(BOOL finished) {
// eventually, this is a value that I want the method to return
isInBlinkState = !isInBlinkState;
}];
}
else
{
// Stop blinking
[UIView animateWithDuration:0.30f
delay:0
options:UIViewAnimationOptionAllowUserInteraction
animations:^{
// Stop blinking - reset everything
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationRepeatCount:1];
[button setAlpha:1.0f];
} completion:^(BOOL finished) {
// eventually, this is a value that I want the method to return
isInBlinkState = !isInBlinkState;
}];
}
}
Prior to block-based calls, my original method looked like this:
- (void)animateItemWithBlinking:(BOOL) blinking {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.50f];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
if( !blinking ) {
// Start it
[UIView setAnimationRepeatCount:1000];
[UIView setAnimationRepeatAutoreverses:YES];
[button setAlpha:0.0f];
} else {
// Stop it
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationRepeatCount:1];
[button setAlpha:1.0f];
}
blinking = !blinking;
[UIView commitAnimations];
}
Yes, you can set it inside the block, and it will do what you'd expect.