iOS开发中识别图中的二维码

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://cloud.tencent.com/developer/article/1337684

上一篇博客中给出了生成二维码和条形码的代码，本篇博客将会给出识别图片中二维码的代码。

代码：

//1. 初始化扫描仪，设置设别类型和识别质量

CIDetector*detector = CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{ CIDetectorAccuracy : CIDetectorAccuracyHigh };

UIImage * image = UIImage imageNamed:@"er2.jpg";

CGImageRef ref = image.CGImage;

//2. 扫描获取的特征组

NSArray *features = [detector featuresInImage:CIImage imageWithCGImage:ref];

//3. 获取扫描结果

CIQRCodeFeature *feature = features objectAtIndex:0;

NSString *scannedResult = feature.messageString;

//进行处理(音效、网址分析、页面跳转等)

识别二维码主要使用两个类：1.CIDetector  2.CIQRCodeFeature。CIDetector用于扫描图片，CIQRCodeFeature用于存放扫描获取的结果。