StackOverflow2013

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Id
13757058
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0
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2012-12-07T04:45:57.553
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0
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2012-12-07T04:45:57.553
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0
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1143874
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9272102
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2
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1
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text
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f you consider the below 3 things,you will not have any delay while loading Photo-library images 1. Store only the <code>ALAsset URL</code> into your <code>NSMutableArray</code> instead of <code>ALAsset</code> If you are using UIImagePicker, you can get it the URL through didFinishPickingMediaWithInfo delegate <code>NSURL* mediaUrl = [info valueForKey:UIImagePickerControllerMediaURL]</code>; 2.Use the ALAsset <code>aspectRatioThumbnail</code> instead of <code>fullResolutionImage</code> <pre><code> CGImageRef iref = [myasset aspectRatioThumbnail]; UIImage *loadedImage = [UIImage imageWithCGImage:iref]; </code></pre> 3. Do the UI related stuffs in main thread. Because <code>ALAssetsLibrary</code> block will execute in separate thread. So the performance will improve when doing UI related stuffs in main thread. To do this either use <code>dispatch_sync(dispatch_get_main_queue()</code> or <code>performSelectorOnMainThread</code> Example: <pre><code> dispatch_sync(dispatch_get_main_queue(), ^{ cell.imageView.image = [UIImage imageWithCGImage:iref]; });//end block </code></pre> Final code should be look like as below <pre><code>ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset){ dispatch_sync(dispatch_get_main_queue(), ^{ GImageRef iref = [myasset aspectRatioThumbnail]; cell.imageView.image = [UIImage imageWithCGImage:iref]; });//end block }; ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror) { NSLog(@"Cant get image - %@",[myerror localizedDescription]); }; ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init]; // USE ALAssetsLibrary as single-tone or global while using ARC [assetslibrary assetForURL:asseturlFromYourArray resultBlock:resultblock failureBlock:failureblock]; } </code></pre>
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1. POALAssetsLibrary, NSMutable Array and UITableview lazy scrolling?
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1. PTAnswer
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1. USShamsudheen TK
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