Question

I have UIScrollView and i’m using it in pagingEnabled mode. In this UIScrollView,i’ve many images to load.So it’s impossible to load all of them. I decided to load five by five. Initially, i load five images and set their position,size and tags. So far, i’m able to do this.

Once user arrives fourth page, i need to set sixth page and remove first page from superview. For that, I’m using this method to do that.

[[self.scrollView viewWithTag:currentPage-3] removeFromSuperView];

To detect page changed event properly, i’ve used almost all of the delegate methods of UIScrollView, but when users scrolls continuously, i’ve missed pages. So, i cannot load images properly. For example,when i missed to load page 6, i cannot load page 8.

I tried to disable userInteraction mode, even if it’s set to NO,user can continue scrolling.

What i want to do is,when user did page changed, i want to disable UIScrollView to scroll until i finished loading images into UIScrollView.

Do you guys have any idea,how can i accomplish that ?

Thank you.

Answer 1

What i want to do is,when user did page changed, i want to disable UIScrollView to scroll until i finished loading images into UIScrollView.

If you want to disable scrolling after each page scroll, look to the UIScrollViewDelegate methods, like scrollViewDidScroll:

http://developer.apple.com/library/ios/#documentation/uikit/reference/UIScrollViewDelegate_Protocol/Reference/UIScrollViewDelegate.html#//apple_ref/occ/intf/UIScrollViewDelegate

Within scrollViewDidScroll: you can set scrollEnabled on the UIScrollView to NO. Once you’re images finish loading, re-enable scrolling through the same property.