StackOverflow2013

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POGetting a UIImage from an ALASSET to use ad an attachment when sending an email
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copied!<p>I have a collection view which contains ALASSETS, I want to be able to select an item (photo) in the collection view and send it as an attachment in an email. The collection view is based on a tutorial, iPhone Programming Tutorial: Creating An Image Gallery this is a recent post so it should be up to date.</p> <p>The code executed when the user selects a photo is as follows.</p> <pre><code>-(void) collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:`enter code here`(NSIndexPath *)indexPath { ALAsset *asset = self.assets[indexPath.row]; ALAssetRepresentation *defaultRep = [asset defaultRepresentation]; UIImage *image = [UIImage imageWithCGImage:[defaultRep fullScreenImage] scale:[defaultRep scale] orientation:0]; [self.testImage setImage:[UIImage imageWithCGImage:[defaultRep fullScreenImage] scale:[defaultRep scale] orientation:0]]; [self.testImage2 setImage:[UIImage imageWithCGImage:[asset thumbnail]]]; // send email if ([MFMailComposeViewController canSendMail]) { MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init]; controller.mailComposeDelegate = self; [controller setToRecipients:[NSArray arrayWithObject:@"rasmus4200@gmail.com"]]; [controller setSubject:@"Subject Goes Here."]; [controller setMessageBody:@"Your message goes here." isHTML:NO]; // Attach an image to the email //NSData *myData = UIImagePNGRepresentation(coolImage); //NSData *myData = UIImageJPEGRepresentation([UIImage imageWithCGImage:[asset thumbnail]], 1.0); NSData *myData = UIImageJPEGRepresentation(image, 1.0); [controller addAttachmentData:myData mimeType:@"image/jpg" fileName:@"coolImage.jpg"]; [self presentModalViewController:controller animated:YES]; } else { NSLog(@"Device is unable to send email in its current state."); } </code></pre> <p>The important lines of code would seem to be .</p> <p>I should now have an image which I can pass to the email as an attachment as follows</p> <pre><code>NSData *myData = UIImageJPEGRepresentation(image, 1.0); </code></pre> <p>But when I view my email there is no image.</p> <p>I thought maybe I was not actually getting the asset so i did the following test I decided to include the asset thumbnail image as follows which is now commented</p> <pre><code>NSData *myData = UIImageJPEGRepresentation([UIImage imageWithCGImage:[asset thumbnail]], 1.0); </code></pre> <p>and this works fine it created the email with the thumbnail</p> <p>This problem has me tearing my hair out so any help will be gratefully accepted.</p> <p>I have tried the following in many shapes and forms to retrieve the image but nothing seems to work </p> <p>Attempt 1 :</p> <pre><code>// Set up Blocks ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *asset) { UIImage *coolImage; // get the image ALAssetRepresentation *rep = [asset defaultRepresentation]; CGImageRef iref = [rep fullResolutionImage]; if (iref) { coolImage = [UIImage imageWithCGImage:iref]; } // send email if ([MFMailComposeViewController canSendMail]) { MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init]; controller.mailComposeDelegate = self; [controller setToRecipients:[NSArray arrayWithObject:@"rasmus4200@gmail.com"]]; [controller setSubject:@"Subject Goes Here."]; [controller setMessageBody:@"Your message goes here." isHTML:NO]; // Attach an image to the email //NSData *myData = UIImagePNGRepresentation(coolImage); NSData *myData = UIImageJPEGRepresentation(coolImage, 1.0); [controller addAttachmentData:myData mimeType:@"image/jpg" fileName:@"coolImage.jpg"]; [self presentModalViewController:controller animated:YES]; } else { NSLog(@"Device is unable to send email in its current state."); } }; ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror) { NSLog(@"booya, cant get image - %@",[myerror localizedDescription]); }; // GET THE URL of image NSURL *url = [[NSURL alloc] init]; url = asset.defaultRepresentation.url; // create library and set callbacks ALAssetsLibrary *al = [ConDetailsViewController defaultAssetsLibrary]; [al assetForURL:url resultBlock:resultblock failureBlock:failureblock]; } </code></pre>

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