iOS 7 Core Image QR Code generation too blur

Question

here\'s my code for generating QRCode image

+ (UIImage *)generateQRCodeWithString:(NSString *)string {
    NSData *stringData = [string dataUsingEncoding:NSU         


        

Answer 1

Easiest solution is to add following to your image view:

imgViewQR.layer.magnificationFilter = kCAFilterNearest

This will automatically upscale your generated QR code image to imageview's size using nearest which results in sharp, pixelated image. This usually isn't what you want when resizing icons/photos but is perfect for QR codes

(it doesn't seem to work on simulator but works great on real device