Setting a new contentSize to a UIScrollView causes it to scroll back to point x:0 y:0

Question

In my app I have some logic that changes the UIScrollView's contentSize dynamically. The problem I'm running into is that when I change the contentSize it sets the contentOffset to CGPointZero or something like that.

I guess you can't set contentSize to be in the middle of the UIScrollView. Any ideas on how to get this to work?

In other words I want to change the contentSize of my UIScrollView half way and keep its contentOffset.

thanks in advance,

fbr

Answer 1

As you've already seen, you can't do this by changing contentSize, but you can fake it by changing the contentOffset and moving your subviews around. An example of this in the DTInfiniteGridView class of Daniel Tull's DTKit library.

Answer 2

I don't know about which is the method will used,

- (void)viewDidLoad {
    [super viewDidLoad];
    srcv.contentSize = ?;
}

Here what will come and replace with "?" to scroll the simulator