1.生成二維碼圖片

import UIKit
import CoreImage

func generateQRCode(from string: String) -> UIImage? {
     let data = string.data(using: String.Encoding.utf8)
    
    if let filter = CIFilter(name: "CIQRCodeGenerator") {
        filter.setValue(data, forKey: "inputMessage")
        let transform = CGAffineTransform(scaleX: 3, y: 3)
        
        if let output = filter.outputImage?.transformed(by: transform) {
            return UIImage(ciImage: output)
        }
    }
    
    return nil
}

class SendVC: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        title = "舊機(jī)發(fā)送"
        view.backgroundColor = .white
        
        addImageView()
    }
    
    func addImageView() {
        let imageView = UIImageView()
        view.addSubview(imageView)
        imageView.snp.makeConstraints { make in
            make.center.equalToSuperview()
            make.width.height.equalTo(200)
        }
        
        imageView.image = generateQRCode(from: "123")
    }
}

2.掃描二維碼（含上下掃描動畫）

文章來源地址http://www.zghlxwxcb.cn/news/detail-676582.html

2.1 記得在info.plist中添加相機(jī)權(quán)限描述

• 在使用下面的代碼之前，確保你的 Info.plist 文件中已添加了相機(jī)權(quán)限描述（Camera Usage Description）。

<key>NSCameraUsageDescription</key>
<string>We need access to your camera for QR code scanning.</string>

import AVFoundation
import UIKit



class QRCodeScannerViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate {
    
    var captureSession: AVCaptureSession!
    var previewLayer: AVCaptureVideoPreviewLayer!
    
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 設(shè)置 AVCaptureSession
        captureSession = AVCaptureSession()
        
        guard let videoCaptureDevice = AVCaptureDevice.default(for: .video) else { return }
        let videoInput: AVCaptureDeviceInput
        
        do {
            videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice)
        } catch {
            return
        }
        
        if captureSession.canAddInput(videoInput) {
            captureSession.addInput(videoInput)
        } else {
            return
        }
        
        let metadataOutput = AVCaptureMetadataOutput()
        
        if captureSession.canAddOutput(metadataOutput) {
            captureSession.addOutput(metadataOutput)
            
            metadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
            metadataOutput.metadataObjectTypes = [.qr]
        } else {
            return
        }
        
        // 設(shè)置預(yù)覽圖層
        previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
        previewLayer.frame = view.layer.bounds
        previewLayer.videoGravity = .resizeAspectFill
        view.layer.addSublayer(previewLayer)
        
        // 開始掃描
        captureSession.startRunning()
        
        addMaskToScannerView()
    }
    
    var scanningLine: UIView!
    func addMaskToScannerView() {
        // 計算正方形的位置，使其位于視圖的正中心
        let squareSize: CGFloat = 300
        let squareX = (view.bounds.width - squareSize) / 2
        let squareY = (view.bounds.height - squareSize) / 2

        // 創(chuàng)建四個半透明的 UIView 元素作為遮罩
        let topMask = UIView(frame: CGRect(x: 0, y: 0, width: view.bounds.width, height: squareY))
        let bottomMask = UIView(frame: CGRect(x: 0, y: squareY + squareSize, width: view.bounds.width, height: view.bounds.height - (squareY + squareSize)))
        let leftMask = UIView(frame: CGRect(x: 0, y: squareY, width: squareX, height: squareSize))
        let rightMask = UIView(frame: CGRect(x: squareX + squareSize, y: squareY, width: view.bounds.width - (squareX + squareSize), height: squareSize))

        // 設(shè)置遮罩的背景顏色
        [topMask, bottomMask, leftMask, rightMask].forEach {
            $0.backgroundColor = UIColor.black.withAlphaComponent(0.6)
            view.addSubview($0)
        }

        // 添加綠色的正方形框
        let squareFrame = UIView(frame: CGRect(x: squareX, y: squareY, width: squareSize, height: squareSize))
        squareFrame.layer.borderColor = UIColor.green.cgColor
        squareFrame.layer.borderWidth = 3
        squareFrame.backgroundColor = .clear
        view.addSubview(squareFrame)
        
        // 添加掃描線
        scanningLine = UIView(frame: CGRect(x: squareX, y: squareY, width: squareSize, height: 2))
        scanningLine.backgroundColor = UIColor.red
        view.addSubview(scanningLine)

        // 掃描線動畫
        let animation = CABasicAnimation(keyPath: "position.y")
        animation.fromValue = squareY
        animation.toValue = squareY + squareSize
        animation.duration = 2
        animation.repeatCount = .infinity
        scanningLine.layer.add(animation, forKey: "scanning")
    }

    
    // 當(dāng)掃描到 QRCode 時，此方法將被調(diào)用
    func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
        captureSession.stopRunning()
        
        if let metadataObject = metadataObjects.first {
            guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return }
            guard let stringValue = readableObject.stringValue else { return }
            
            AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate))
            found(code: stringValue)
        }
        
        dismiss(animated: true)
    }
    
    func found(code: String) {
        print("QRCode: \(code)")
        // 在此處處理掃描到的 QRCode
    }
    
    // 其他代碼，如視圖將要消失時停止掃描等
}

到了這里，關(guān)于iOS swift5 掃描二維碼的文章就介紹完了。如果您還想了解更多內(nèi)容，請在右上角搜索TOY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！