调用方法
UIImage *QRImg = [self generateQRCode:urlStr width:qrCodeImgWidth height:qrCodeImgWidth];
生成二维码方法
#pragma mark - 生成条形码以及二维码
- (UIImage *)generateQRCode:(NSString *)code width:(CGFloat)width height:(CGFloat)height {
// 生成二维码图片
CIImage *qrcodeImage;
NSData *data = [code dataUsingEncoding:NSISOLatin1StringEncoding allowLossyConversion:false];
CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
[filter setValue:data forKey:@"inputMessage"];
[filter setValue:@"H" forKey:@"inputCorrectionLevel"];
qrcodeImage = [filter outputImage];
// 消除模糊
CGFloat scaleX = width / qrcodeImage.extent.size.width; // extent 返回图片的frame
CGFloat scaleY = height / qrcodeImage.extent.size.height;
CIImage *transformedImage = [qrcodeImage imageByApplyingTransform:CGAffineTransformScale(CGAffineTransformIdentity, scaleX, scaleY)];
return [UIImage imageWithCIImage:transformedImage];
}
