UIView not animated properly using UIView Animation - ios

Question

I am working on UIView Animation. I want to move a view upside while i scroll up and should move down when i scroll down.
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
CGPoint scrollVelocity = [_collectionViewLeaderboard.panGestureRecognizer velocityInView:_collectionViewLeaderboard.superview];
if (scrollVelocity.y > 0.0f){
NSLog(#"going down");
[UIView animateWithDuration:0.3f
animations:^ {
_headerview.frame = CGRectMake(0, 0, _headerview.frame.size.width, _headerview.frame.size.height);
_headerviewSecond.frame = CGRectMake(0, _headerview.frame.size.height, _headerviewSecond.frame.size.width, _headerviewSecond.frame.size.height);
self.collectionViewLeaderboard.frame = CGRectMake(self.view.frame.origin.x, _headerviewSecond.frame.size.height+_headerview.frame.size.height, self.view.frame.size.width, self.view.frame.size.height);
frameconditon = _headerview.frame;
_viewOptions.frame = CGRectMake(_viewOptions.frame.origin.x,_headerview.frame.size.height+_headerviewSecond.frame.size.height+30, _viewOptions.frame.size.width, _viewOptions.frame.size.height);
} completion:^ (BOOL completed) {
}];
}
else if (scrollVelocity.y < 0.0f){
NSLog(#"going up");
[UIView animateWithDuration:5.3 animations:^{
_headerview.frame = CGRectMake(_headerview.frame.origin.x, -(_headerview.frame.size.height), _headerview.frame.size.width, _headerview.frame.size.height);
_headerviewSecond.frame = CGRectMake(0, (_headerview.frame.size.height)-40, _headerviewSecond.frame.size.width, _headerviewSecond.frame.size.height);
self.collectionViewLeaderboard.frame = CGRectMake(self.view.frame.origin.x, _headerviewSecond.frame.size.height, self.view.frame.size.width, self.view.frame.size.height);
frameconditon = _headerviewSecond.frame;
_viewOptions.frame = CGRectMake(_viewOptions.frame.origin.x,_headerviewSecond.frame.size.height+20, _viewOptions.frame.size.width, _viewOptions.frame.size.height);
} completion:^(BOOL finished) {
}];
}
}

Answer 1

I believe its very simple thing if you want to move the view up and down.
Because If you add view in scroll view you can automatically get the view up and down along with the scroll. You just need to set "contentSize" property of scrollView.
If its not the case, you are trying to get panGesture of UICollectionView then you can not get in "scrollViewDidScroll" method.
Here is the useful tutorial on UIPanGestureRecognizer with UICollectionView. Hope so it will help.
https://uncorkedstudios.com/blog/using-uigesturerecognizers-with-uicollectionviews