Animation Delay - xcode

Question

I am trying to set a delay for my animation, so once it appears and then disappears, I want to wait a certain amount of seconds for it to reappear. I have tried placing it in multiple spots throughout my code, but it was all the same result.
- (void) startRedDot {
redDotTimer = [NSTimer scheduledTimerWithTimeInterval:1.5
target:self
selector:#selector(moveButtonWithAnimation)
userInfo:nil
repeats:YES];
[redDotTimer fire];
}
-(void) moveButtonRandomly {
CGSize limits;
CGPoint newPosition;
// Get limits
limits.width = gameView.frame.size.width - redButton.frame.size.width;
limits.height = gameView.frame.size.height - redButton.frame.size.height;
// Calculate new Position
newPosition = (CGPoint){ limits.width * drand48(), limits.height * drand48() };
// Set new frame
redButton.frame = (CGRect){ newPosition, redButton.frame.size };
}
- (void) moveButtonWithAnimation {
CGFloat fadeDurration;
if ( !redButton )
return; // only invoke the button if it exists
fadeDurration = 0.0f;
//Fade Out
[UIView animateWithDuration: fadeDurration animations:^{
redButton.alpha = 0.0f;
} completion:^(BOOL finished) {
// Move the button while it is not visible
[self moveButtonRandomly];
[UIView setAnimationDelay:9.0];
// Fade in
[UIView animateWithDuration: fadeDurration animations:^{
redButton.alpha = 4.0f;
}];
}];
}

Answer 1

setAnimationDelay should use in beginAnimation and commitAnimation block, and it was old way to do animation in iOS. In your case try this:
- (void) moveButtonWithAnimation {
CGFloat fadeDurration;
if ( !redButton )
return; // only invoke the button if it exists
fadeDurration = 2.0f;
//Fade Out
[UIView animateWithDuration: fadeDurration animations:^{
redButton.alpha = 0.0f;
} completion:^(BOOL finished) {
// Move the button while it is not visible
[self moveButtonRandomly];
[UIView animateWithDuration:fadeDurration delay:2.0 options:0 animations:^{
redButton.alpha = 1.0f;
} completion:nil];
}];
}