Question

i have an uiscrollview and i add one by one uiimageviews but when i add more than 40 objects i have problem with memory i guess and the app crashes…what should i do? i am trying to make an app like photo viewer from apple! Help please!

i do not want thumbnais i just want to show the next image when the user flick from one to another but i have to unload the previous image and show the next one

i remove the previous like this

UIImageView l;

l=[[scroll subviews] objectAtIndex:0];
[l removeFromSuperview];
l=nil;

and then i add the next one like this

[scroll insertSubview:imageView atIndex:counter];

but i see a black background no image

please help!

Answer 1

The best way to do this is to load a few of the images at a time into a table view. In each cell of the table, put three thumbnails. You’ll need to make a custom cell. That way, the table cells will be de-queued and the memory re-used. Check the Facebook Three20 project, I think they’ve implemented it like this, so you’ll have some code to work with.

http://joehewitt.com/post/the-three20-project/