iOS 生成二维码，生成条形码图片

最新推荐文章于 2024-09-24 09:03:46 发布

lisiben

最新推荐文章于 2024-09-24 09:03:46 发布

阅读量295

点赞数

CC 4.0 BY-SA版权

分类专栏： iPhone iOS Objective-c

本文链接：https://blog.youkuaiyun.com/lisiben/article/details/84754249

iPhone 同时被 3 个专栏收录

271 篇文章

订阅专栏

iOS

116 篇文章

订阅专栏

Objective-c

116 篇文章

订阅专栏

本文详细介绍了如何使用Swift语言实现二维码和条形码的生成，并提供了相应的代码示例，帮助开发者轻松创建所需的二维图形标识。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

#pragma mark - 生成条形码以及二维码

// 参考文档
// https://developer.apple.com/library/mac/documentation/GraphicsImaging/Reference/CoreImageFilterReference/index.html

- (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];
}

- (UIImage *)generateBarCode:(NSString *)code width:(CGFloat)width height:(CGFloat)height {
    // 生成条码图片
    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];
}