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POLoading UIImage from UIImagePickerControllerReferenceURL
 

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    <p>I am using a UIImagePickerController to allow users to select an image from the image library. I then want to start the location of that file in a sqlite database so I can refer to it later. </p> <p>I've been doing some googling about how to do this and I'm coming up rather short. I know I can get the ReferenceURL of the item by calling inside the delegate method:</p> <pre><code> NSURL *picURL = [info objectForKey:@"UIImagePickerControllerReferenceURL"] </code></pre> <p>This does give me a valid NSURL object and if I output picURL.absoluteString I can what appears to be a valid url to the assets-library location of the file. However, if I try to create an NSData object with this url so I can in turn create a UIImage, the code fails because NSData returns nil. For example:</p> <pre><code> NSURL *picURL = [info objectForKey:@"UIImagePickerControllerReferenceURL"] NSString *stringUrl = picURL.absoluteString; NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:stringUrl]]; imgMain.image = [UIImage imageWithData:data] </code></pre> <p>I realize I'm being somewhat repetitive here but the point is to grab a string representation of the URL that I can store in sqlite and then use said string later to create an image (so the above code represents that train of thought).</p> <p>I found some information floating around about using ALAssetsLibrary but that gave me all kinds of fits as it doesn't appear to play nice with iOS 5 and ARC. I keep getting error messages 'Receiver type ALAsset for instance message is a forward declaration. I can set properties on the file that references ALAsset / ALAssetsLibrary to ignore ARC which stops the build error but then as soon as I leave the code block the data goes away. See below:</p> <pre><code> NSURL *referenceURL = [info objectForKey:UIImagePickerControllerReferenceURL]; ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init]; __block UIImage *returnValue = nil; [library assetForURL:referenceURL resultBlock:^(ALAsset *asset) { returnValue = [UIImage imageWithCGImage:[[asset defaultRepresentation] fullResolutionImage]]; } failureBlock:^(NSError *error) { // error handling }]; [library release]; </code></pre> <p>returnValue does return a valid image but as soon as the code exits the resultBlock the contents of the data are gone (i.e. returnValue becomes null again). </p> <p>So my question is: how do I use the UIImagePickerControllerReferenceURL and convert it to a string I can store in sqlite and then use said string to create a valid UIImage object at a later time?</p>
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    1. USShane McGarry
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    1. CODid you get anywhere with thsi?
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      1. USSteven Fisher
 

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