iOS开发——生成条形码，二维码

- (void)viewDidLoad {

    [super viewDidLoad];

    

    self.imageView.image = [self generateBarCode:@"1524829417" 60 height:60];

    

    self.imageView2.image = [self generateQRCode:@"1524829417" 60 height:60];

}

- (UIImage *)generateBarCode:(NSString *)code (CGFloat)width height:(CGFloat)height {

    // 生成条形码图片

    CIImage *barcodeImage;

    NSData *data = [code dataUsingEncoding:NSISOLatin1StringEncoding allowLossyConversion:false];

    CIFilter *filter = [CIFilter filterWithName:@"CICode128BarcodeGenerator"];

    

    [filter setValue:data forKey:@"inputMessage"];

    barcodeImage = [filter outputImage];

    

    // 消除模糊

    CGFloat scaleX = width / barcodeImage.extent.size.width; // extent 返回图片的frame

    CGFloat scaleY = height / barcodeImage.extent.size.height;

    CIImage *transformedImage = [barcodeImage imageByApplyingTransform:CGAffineTransformScale(CGAffineTransformIdentity, scaleX, scaleY)];

    

    return [UIImage imageWithCIImage:transformedImage];

}

- (UIImage *)generateQRCode:(NSString *)code (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];

}