ios 原生方法如何识别相册图片二维码

Question

如题，请问ios如何通过原生的方法实现，识别相册图片中的二维码？不考虑版本兼容，不适用第三方

Answer 1

搬运工又来了： http://stackoverflow.com/questions/28317071/scan-qrcode-and-barcode-from-camera-and-image-which-picked-from-image-library-in

qrCodeImageView.image=qrcodeImg

var detector:CIDetector=CIDetector(ofType: CIDetectorTypeQRCode, context: nil, options: [CIDetectorAccuracy:CIDetectorAccuracyHigh])
var decode=""
var ciImage:CIImage=CIImage(image:qrcodeImg)
qrCodeLink=""

let features=detector.featuresInImage(ciImage)
for feature in features as! [CIQRCodeFeature] {
   qrCodeLink += feature.messageString
}

if qrCodeLink=="" {
    println("nothing")
}else{
    println("message: \(qrCodeLink)")
}

Answer 2

https://github.com/wangruocong/RoyQRcode
可以参考下，纯原生写的。