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POQR Code Scanning in ios application
 

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    <p>I need to integrate QR-code reader in app and found a <a href="http://iphonenativeapp.blogspot.in/2011/07/qr-code-readerscanner-for-iphone-app-in.html" rel="noreferrer">tutorial</a> for it.</p> <p>I downloaded Z-bar sdk from this <a href="http://sourceforge.net/projects/zbar/files/iPhoneSDK/ZBarSDK-1.2.dmg/download" rel="noreferrer">link</a>.</p> <p>Here is what I had done.</p> <p>In the QRscannerViewController.m </p> <pre><code>-(IBAction)StartScan:(id) sender { ZBarReaderViewController *reader = [ZBarReaderViewController new]; reader.readerDelegate = self; reader.readerView.torchMode = 0; ZBarImageScanner *scanner = reader.scanner; // TODO: (optional) additional reader configuration here // EXAMPLE: disable rarely used I2/5 to improve performance [scanner setSymbology: ZBAR_I25 config: ZBAR_CFG_ENABLE to: 0]; // present and release the controller [self presentModalViewController: reader animated: YES]; [reader release]; resultTextView.hidden=NO; } - (void) readerControllerDidFailToRead: (ZBarReaderController*) reader withRetry: (BOOL) retry{ NSLog(@"the image picker failing to read"); } - (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info { NSLog(@"the image picker is calling successfully %@",info); // ADD: get the decode results id&lt;NSFastEnumeration&gt; results = [info objectForKey: ZBarReaderControllerResults]; ZBarSymbol *symbol = nil; NSString *hiddenData; for(symbol in results) hiddenData=[NSString stringWithString:symbol.data]; NSLog(@"the symbols is the following %@",symbol.data); // EXAMPLE: just grab the first barcode // break; // EXAMPLE: do something useful with the barcode data //resultText.text = symbol.data; resultTextView.text=symbol.data; NSLog(@"BARCODE= %@",symbol.data); NSUserDefaults *storeData=[NSUserDefaults standardUserDefaults]; [storeData setObject:hiddenData forKey:@"CONSUMERID"]; NSLog(@"SYMBOL : %@",hiddenData); resultTextView.text=hiddenData; [reader dismissModalViewControllerAnimated: NO]; } </code></pre> <p>All needed frameworks were added, so there is no <code>referenced from</code> errors.</p> <p>When I click the scan button, the ZBarReaderViewController appears well and I hold the alt key and left click the mouse to open the photo library of simulator and all works fine.</p> <p>What the problem is, </p> <ol> <li>The QR image is not get scanned, ie <code>imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo</code> function is not get called.</li> <li>The QR image appears larger than its original size.</li> </ol> <p><img src="https://i.stack.imgur.com/W3GRs.png" alt="enter image description here"></p> <p>How to solve this?</p> <p>Why the image not get scanned?</p>
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    1. USAzik Abdullah
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    1. COqr should be fully visible to read. due to larger image of the qr code the library is unable to scan .. all the four corners should be there in the image.
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      1. USSharon Nathaniel
    2. CO@SharonNathaniel, how to reduce that size?
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    3. COI suggest try it on a device pointing it to a qr code on a paper or screen. Since you are fetching images from the photo library in the simulator I am not sure you can manipulate it before giving it to reader. I recommend trying it on a device.
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