Best Practices for reloading one cell & performance issues

[ralphleon]

Hi,

I have a large amount of cells (say 1000) that all have 512x512 images loaded into them from the local cache (~/Library/Cache). Loading the images in:

- (AQGridViewCell *) gridView: (AQGridView *) aGridView cellForItemAtIndex: (NSUInteger) index

via [UIImage imageWithContentsOfFile ...] is understandably locking the main thread, so I have a background thread loading the cells images. When this thread (actually a GD queue) finishes loading the image (the core graphics way to not block the thread) I attempted to have it call [_grid reloadData] but this too introduced lag.

Currently I use

   if([[_gridView visibleCellIndices] containsIndex:index]){
        NSIndexSet * s = [NSIndexSet indexSetWithIndex:index];
        [_gridView reloadItemsAtIndices:s withAnimation:AQGridViewItemAnimationNone];
    }

to attempt to manually reload the image for one cell... but this sometimes throws the ominous warning of:

 Visible cell list is missing some items!
 Got 16 missing indices

So, what I'm getting at is what's the best practices for dealing with lazy image loading an AQGridView?

[jignesh133]

having same issue... pls help me.....