UIView multiple animations with different durations - ios

Question

I have a background UIImageView which is constantly animating with this code that gets called at the end of ViewDidAppear:
- (void)beginBackgroundAnimation
{
[UIView animateWithDuration:45
delay:0
options:UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse
animations:^{
_background.frame = CGRectMake(-_background.frame.size.width + self.view.frame.size.width,
_background.frame.origin.y,
_background.frame.size.width,
_background.frame.size.height);
}
completion:nil];
}
The problem is, when I perform another animation, such as this:
[UIView animateWithDuration:delay animations:^{
registerRowView.alpha = 1;
registerRowView.frame = newFrame; // this line kills the animation
}];
The background animation resets to it's original state and stops animating..
Thank you in advance!

Answer 1

Try this:
Keep a bool variable globally like: BOOL isFirstAnimationCompleted; and set it false in the starting of the first animation.
[UIView animateWithDuration:45
delay:0
options:UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse
animations:^{
_background.frame = CGRectMake(_background.frame.size.width + self.view.frame.size.width,
_background.frame.origin.y,
_background.frame.size.width,
_background.frame.size.height);
}
completion:^(BOOL finished) {
if(finished) {
isFirstAnimationCompleted = finished;
}
}];
Check while the user wants to perform the second animation like:
if(isFirstAnimationCompleted) {
[UIView animateWithDuration:delay animations:^{
registerRowView.alpha = 1;
registerRowView.frame = newFrame; // this line kills the animation
}];
}