swift实现二维码扫描

备注：使用第三方库[swiftScan]
(https://github.com/MxABC/swiftScan/blob/master/README-Chinese.md)

1. 步骤

(1)使用cocoapods安装swiftScan第三方库

pod 'swiftScan'    #二维码扫描

说明：使用cocoapods安装第三方库请参考Cocoapods管理IOS依赖库

(2)编译后引入swiftScan

import swiftScan

(3)遵从LBXScanViewController协议

遵从LBXScanViewController协议.png
运行报错：Cannot Record。
分析:在模拟器中没有摄像头不能录制。
(4)重写handleCodeResult方法

override func handleCodeResult(arrayResult: [LBXScanResult]) {
        if let result = arrayResult.first {
            let msg = result.strScanned
            print("扫描结果:" + msg!)

        }
    }

(5)自定义扫描动画

//扫描动画：在github下载项目，复制CodeScan.bundle获取图片
var style = LBXScanViewStyle()
style.anmiationStyle = .NetGrid
style.animationImage = UIImage(named: "CodeScan.bundle/qrcode_scan_part_net")
  scanStyle = style

2. 具体实现

(1)界面设计

界面设计.png

(2)扫一扫对应的视图控制器ScanViewController.swift

//
//  ScanViewController.swift
//  JackUChat
//
//  Created by 徐云 on 2019/2/25.
//  Copyright © 2019 Liy. All rights reserved.
//

import UIKit
import swiftScan

class ScanViewController: LBXScanViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        
       //自定义视图导航标题
        self.title = "二维码/条码"
        navigationController?.navigationBar.barStyle = .blackTranslucent
        navigationController?.navigationBar.tintColor = UIColor.white
        
        //扫描动画：在github下载项目，复制CodeScan.bundle获取图片
        var style = LBXScanViewStyle()
        style.anmiationStyle = .NetGrid
        style.animationImage = UIImage(named: "CodeScan.bundle/qrcode_scan_part_net")//引用bundle中的图片
        scanStyle = style
        
    }
    
    override func handleCodeResult(arrayResult: [LBXScanResult]) {
        if let result = arrayResult.first {
            let msg = result.strScanned
            print("扫描结果:" + msg!)

        }
    }

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

3. 效果展示

二维码扫描界面.png

4. 返回上级界面时速度慢

(1)分析：组件作者可能是按O-C的思路来写的swiftScan库的，swift时代不需要销毁(反初始化)的处理。

控制台信息.png

(2)解决方案：修改LBXScanViewController源码，注释viewWillDisappear()函数中的代码

解决方案.png