長按二維碼識別

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直接上代碼

    // 二維碼識別
    fileprivate func recoginzeQRCode(_ image: UIImage) -> String?
    {
        // 創建二維碼探測器
        //1.初始化掃描儀，設置設別類型和識別質量
        let detector = CIDetector(ofType: CIDetectorTypeQRCode, context: nil, options: [CIDetectorAccuracy: CIDetectorAccuracyHigh])
        let cgImage = CIImage(image: image)
        //2.掃描獲取的特徵組
        if let image = cgImage {
            let features = detector?.features(in: image)
            if let count = features?.count {
                guard count > 0 else { return nil }
            } else {
                return nil
            }
            //3.獲取掃描結果
            let feature = features?.first as? CIQRCodeFeature
            return feature?.messageString
        } else {
            UIApplication.dLog("圖片無法轉成CIImage")
            return nil
        }
    }
    
    // 二維碼識別結果
    fileprivate func recoginze(_ image: UIImage) {
        DispatchQueue.global().async {
            let recognizeResult = self.recoginzeQRCode(image)
            if let count = recognizeResult?.characters.count {
                let result = count > 0 ? recognizeResult : "無法識別"
                DispatchQueue.main.async {
                    UIApplication.dLog(result)
                    if #available(iOS 10.0, *) {
                        UIApplication.shared.open(URL(string: result!)!, options: [:], completionHandler: nil)
                    } else {
                        UIApplication.shared.openURL(URL(string: result!)!)
                    }
                }
            }
        }
    }

簡書博客地址

https://www.jianshu.com/u/3c7c13f3dc6b