【iOS】识别相册中的二维码

本文主要是介绍【iOS】识别相册中的二维码，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1、选择图片

	UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;imagePicker.delegate = self;[viewController presentViewController:imagePicker animated:YES completion:nil];

2、识别图片

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<UIImagePickerControllerInfoKey,id> *)info
{[picker dismissViewControllerAnimated:YES completion:nil];// 1、提取图片UIImage *image = info[UIImagePickerControllerOriginalImage];// 2、创建 CIImageCIImage *ciimage = [[CIImage alloc] initWithImage:image];// 3、识别精度NSDictionary *options = @{CIDetectorAccuracy: CIDetectorAccuracyHigh};// 4、创建识别器CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:options];NSArray *features = [detector featuresInImage:ciimage];NSString *message = nil;for (CIFeature *item in features) {if ([item isKindOfClass:[CIQRCodeFeature class]]) {message = [(CIQRCodeFeature *)item messageString];break;}}if ([self.delegate respondsToSelector:@selector(recognitionString:)]) {[self.delegate recognitionString:message];}
}

参考：iOS开发教程之识别图片中二维码功能的实现

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