Fade In / Fade out 2 Labels infinite loop inside tableview - ios

Question

I'm trying to show an intermittent label with two changing strings (like a banner) in an infinite loop.
The first label should fade in. After that it should fade out and let a second label do the same. Then repeat the sequence infinitely or a long time.
The label is inside a subclass of a UITableView.
I tried this so far:
- (UITableViewCell *) tableView: (UITableView *) tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
...
// Inside a cell an at its own section of the tableview
cell.label1.alpha = 1;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:3];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationRepeatCount:INFINITY];
[cell.label1 setAlpha:0];
[UIView setAnimationRepeatAutoreverses:YES];
[UIView commitAnimations];
cell.label2.alpha = 1;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:3];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationRepeatCount:INFINITY];
[cell.label1 setAlpha:0];
[UIView setAnimationRepeatAutoreverses:YES];
[UIView commitAnimations];
...
}
This code works fine but the effect is not clear because the fade in label1 is crossing fade out label2 and it is weird.
So, how can I make a break between the two animations, to see the fading labels clearly?

Answer 1

Thanks #Paulw11 for your answer, now it works fine, here is my code with the changes:
cell.label2.alpha = 0;
cell.label1.alpha = 1;
[UIView animateKeyframesWithDuration:15 delay:0.0 options:0 animations:^{
[UIView addKeyframeWithRelativeStartTime:0.0 relativeDuration:0.25 animations:^{
cell.label1.alpha = 0;
cell.label2.alpha = 0;
[self.view layoutIfNeeded];
}];
[UIView addKeyframeWithRelativeStartTime:0.25 relativeDuration:0.25 animations:^{
cell.label1.alpha = 0;
cell.label2.alpha = 1;
[self.view layoutIfNeeded];
}];
[UIView addKeyframeWithRelativeStartTime:0.50 relativeDuration:0.25 animations:^{
cell.label1.alpha = 0;
cell.label2.alpha = 0;
[self.view layoutIfNeeded];
}];
[UIView addKeyframeWithRelativeStartTime:0.75 relativeDuration:0.25 animations:^{
cell.label1.alpha = 1;
cell.label2.alpha = 0;
[self.view layoutIfNeeded];
}];
[UIView setAnimationRepeatCount: 200];
} completion:nil];