iOS长按识别二维码

//

//  FirstView.swift

//  swift3.0

//

//  Created by 韩海龙 on 16/12/1.

//  Copyright © 2016年 hanhl. All rights reserved.

//

import UIKit

class FirstView: UIViewController {

var imageView: UIImageView!

override func viewDidLoad() {

super.viewDidLoad()

imageView = UIImageView.init(frame: CGRect.init(x: 100, y: 100, width: 200, height: 200))

imageView.image = UIImage.init(named: "123.png")

imageView.isUserInteractionEnabled = true

self.view.addSubview(imageView)

//长按识别二维码

let longPress = UILongPressGestureRecognizer.init(target: self, action: #selector(QRLongPress(gesture:)))

longPress.minimumPressDuration = 1

imageView.addGestureRecognizer(longPress)

}

//MARK: - 长按二维码识别

func QRLongPress(gesture: UILongPressGestureRecognizer) {

if (gesture.state == UIGestureRecognizerState.began) {

//1.初始化扫描仪，设置设别类型和识别质量

let options = ["IDetectorAccuracy" : CIDetectorAccuracyHigh]

let detector: CIDetector = CIDetector.init(ofType: "CIDetectorTypeQRCode", context: nil, options: options)!

//2.扫描获取的特征组

let features = detector.features(in: CIImage.init(cgImage: (self.imageView.image?.cgImage)!))

//3.获取扫描结果

let feature = features[0] as! CIQRCodeFeature

let scannedResult = feature.messageString

//4.获取之后的操作

print(scannedResult!)

} else if (gesture.state == UIGestureRecognizerState.ended) {

}

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}