Is it possible to decode QRCode image to value

Question

I'm looking for code which help me to convert QRCode from image. there is very easy way with AVFoundation to scan QR Code with help of camera. But if I want to get encoded qr string from UIImage is there any way to do so?

Answer 1

Native solution:
As far as I know you can scan QR from video since iOS 7. (See other answers)
But scanning from image appeared only in iOS 8.

See CIQRCodeFeature

and this shinobicontrols tutorial

third party libs:
For example ZBar

Answer 2

CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{CIDetectorAccuracy:CIDetectorAccuracyHigh}];
if (detector)  {
  NSArray* featuresR = [detector featuresInImage:scannedImg.CIImage];
  NSString* decodeR;
  for (CIQRCodeFeature* featureR in featuresR)  {
    NSLog(@"decode %@ ",featureR.messageString);
    decodeR = featureR.messageString;
  }
}