确实,其实就是一个长按手势 + 图片二维码识别,原生SDK从8.0开始支持
/**
* 从照片中直接识别二维码
* @param qrCodeImage 带二维码的图片
* @param myQRCode 二维码包含的内容
*/
+ (void)readQRCodeFromImage:(UIImage *)qrCodeImage myQRCode:(void(^)(NSString *qrString,NSError *error))myQRCode;{
UIImage * srcImage = qrCodeImage;
if (nil == srcImage) {
myQRCode(nil,[NSError errorWithDomain:@"未传入图片" code:0 userInfo:nil]);
return;
}
CIContext *context = [CIContext contextWithOptions:nil];
CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:context options:@{CIDetectorAccuracy:CIDetectorAccuracyHigh}];
CIImage *image = [CIImage imageWithCGImage:srcImage.CGImage];
NSArray *features = [detector featuresInImage:image];
if (features.count) {
CIQRCodeFeature *feature = [features firstObject];
NSString *result = feature.messageString;
myQRCode(result,nil);
}
else{
myQRCode(nil,[NSError errorWithDomain:@"未能识别出二维码" code:0 userInfo:nil]);
return;
}
}