Question

I have UIScrollView where placed elements(elements placed from the top to down), how can I remove one row and smoothly move items up, without redrawing?

Answer 1

Well, an easy way to move UIViews (and subclasses) is using Core Animation.

An example, let’s assume you want to move an UIImageView 10 pixels up, this is how I would do that:

[UIView beginAnimations:@"animation" context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationDuration:1.0]; //In seconds
int newPosY = myImage.frame.origin.y - 10;
[myImage setFrame:CGRectMake(self.frame.origin.x, newPosY, myImage.frame.size.width, myImage.frame.size.height)];

[UIView commitAnimations];

EDIT: (Thanks to LucasTizma) Since Apple doesn’t recommend this method you’d better use animateWithDuration:animations: or any of it’s variants. Check this