Loading camera roll images in iOS GridView very slow

Question

I am showing all the images from the camera roll in my iPhone app. I build an array of ALAsset * that contains the list of all images in the camera roll when the app starts. I form cells by loading these images in a image view:

// Get the full resolution image for asset
ALAssetRepresentation *assetRep = [asset defaultRepresentation]; 
UIImage *image = [UIImage imageWithCGImage:[assetRep fullResolutionImage]];
[cell.imageCropper setImage:image];

I do this when a new cell is requested in

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

The problem is that it lags when there are many images and the user scrolls quickly through the images. What is the correct way of handling this?

score 1 · Accepted Answer · edited May 23 '17 at 11:56

1

Consider loading the images in the background using GCD. Maybe this helps: loading images from a background thread using blocks

edited May 23 '17 at 11:56

Community

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answered Jul 22 '12 at 09:06

HeikoG

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score 1 · Answer 2 · answered Sep 28 '12 at 04:38

1

Use thumbnail instead of fullResolutionImages

answered Sep 28 '12 at 04:38

k06a

17,755
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Thumbnail was too small for the app that I was working on. I ended up using `fullScreenImage` with background loading as suggested by @HeikoG. – Pulkit Goyal Sep 28 '12 at 12:10

Loading camera roll images in iOS GridView very slow

2 Answers2