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POMemory Leak when sending image as an attachment via Email
 

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  1. POMemory Leak when sending image as an attachment via Email
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    <p>I have a camera application where the user can share the photos taken through email. I am using MFMailComposerViewController to send mail. Here is the piece of code.</p> <pre><code>- (void) contactEmailRecepients:(NSArray *)emailIDs subject:(NSString *)subject attachment:(NSMutableDictionary *)attachmentDictionary sender:(UIViewController *)sender { if ([MFMailComposeViewController canSendMail]) { mailViewController = [[MFMailComposeViewController alloc] init]; mailViewController.mailComposeDelegate = self; [mailViewController setToRecipients:emailIDs]; [mailViewController setSubject:subject]; NSData *attachmentData = [attachmentDictionary objectForKey:@"attachmentData"]; if (nil != attachmentData) { [mailViewController addAttachmentData:attachmentData mimeType:[attachmentDictionary objectForKey:@"mimeType"] fileName:[attachmentDictionary objectForKey:@"fileName"]]; } [sender presentViewController:mailViewController animated:YES completion:^{}]; attachmentData = nil; [attachmentDictionary removeAllObjects]; attachmentDictionary = nil; } else { // display error message } } </code></pre> <p>My problem is every time I send a mail through my application the VM(Virtual Memory) increases by 6/7 MB. But this does not happen if I comment out following part.</p> <pre><code> if (nil != attachmentData) { [mailViewController addAttachmentData:attachmentData mimeType:[attachmentDictionary objectForKey:@"mimeType"] fileName:[attachmentDictionary objectForKey:@"fileName"]]; } </code></pre> <p>The increased VM is due to <code>CGRasterData</code>and the responsible library is <code>CoreGraphics</code>and responsible caller is <code>CGDataProvideCreateWithCopyOfData</code>when I check it through Xcode 5.0.2 instruments.So somewhere a copy is getting created which is not getting released later.I am suspecting the memory allocated to display the image in Email <code>UIActionSheet</code>is not getting released.</p> <p>Any help is appreciated.</p> <p><strong>EDIT:</strong> Adding the piece of code where <code>attachmentData</code> is getting initialized.</p> <pre><code>- (void)postPhotoFromPath:(NSString *)filePath sender:(UIViewController *)sender { NSData *photoData = [NSData dataWithContentsOfFile:filePath]; if (nil == photoData) { //display error message } else { NSString *fileName = [[filePath componentsSeparatedByString:@"/"] lastObject]; [self contactEmailRecepients:nil subject:nil attachment:[NSDictionary dictionaryWithObjectsAndKeys: photoData, @"attachmentData", @"image/jpeg", @"mimeType", fileName, @"fileName", nil] sender:sender]; } } </code></pre> <p>Also I noticed carefully that VM increases exactly when i get the <code>UIActionSheet</code>regarding which image size to send(whether to send the original size or downscaled size). I am attaching the screenshot for the same here. <img src="https://i.stack.imgur.com/8cdnB.png" alt="UIActionSheet for selecting the image size to be sent"></p>
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    1. USshshnk
    1. USshshnk
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      1. VTUpMod
    1. COcan you post the code related to attachmentData allocation before adding to your attachmentDictionary?
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      1. USchancyWu
    2. COChancy, I have updated my question regarding attachmentData allocation.
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      1. USshshnk
 

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