iOS create QR code

#import "LCTwoCodeImage.h"

@implementation lctwocodeimage

+ (UIImage *) Gotocreatmytwocode:(nsstring *) string {

// Create a QR code initial layer rendering by passing in the string

ciimage * firstimage = [self creatciimagefromstring: string];

// ciimage to generate two-dimensional code

UIImage * QRCode = [self createnoninterpolateduiimageformciimage: Firstimage Withsize:250.0f];

return qrcode;

}

+ (UIImage *) Createnoninterpolateduiimageformciimage: (ciimage *) image withsize: (cgfloat ) Size {

CGRect extent = cgrectintegral(image. Extent);

cgfloat Scale = MIN(Size/cgrectgetwidth (extent), size/cgrectgetheight (extent));

//Create a bitmap image that we'll draw into a bitmap context at the desired size;

size_t width = cgrectgetwidth(extent) * scale;

size_t height = cgrectgetheight(extent) * scale;

cgcolorspaceref cs = Cgcolorspacecreatedevicegray();

cgcontextref bitmapref = cgbitmapcontextcreate(nil, width, height, 8, 0 , CS, (cgbitmapinfo)kcgimagealphanone);

cicontext *context = [cicontext contextwithoptions:nil];

cgimageref bitmapImage = [Context createcgimage: Image Fromrect: extent];

cgcontextsetinterpolationquality(bitmapref, kcginterpolationnone);

CGCONTEXTSCALECTM(bitmapref, scale, scale);

cgcontextdrawimage(bitmapref, extent, bitmapImage);

//Create an image with the contents of our bitmap

cgimageref scaledimage = cgbitmapcontextcreateimage(bitmapref);

//Cleanup

cgcontextrelease(bitmapref);

cgimagerelease(bitmapImage);

return [UIImage imagewithcgimage: scaledimage];

}

+ (ciimage *) creatciimagefromstring: (nsstring *) string {

nsdata * stringdata = [string datausingencoding:nsutf8stringencoding];

// add layer

cifilter * Qrfiler = [cifilter filterwithname:@ "Ciqrcodegenerator"];

[Qrfiler setValue: StringData forkey:@ "InputMessage"];

[Qrfiler setValue:@ "M" forkey:@ "Inputcorrectionlevel"];

return [Qrfiler outputimage];

}

@end

iOS create QR code