ios - 在 Xcode 的另一个 ViewController 中打开 QR 链接

Question

我正在尝试制作 QR 应用程序，但我没有完成最后一步。

今天，当我进行扫描时，我会收到有关结果的警报。我希望将该链接直接发送到我的 webview Controller 并在我的 webview 中读取地址而不是显示警报。

ViewController.swift

func reader(_ reader: QRCodeReaderViewController, didScanResult result: QRCodeReaderResult) {
    reader.stopScanning()



    dismiss(animated: true) { [weak self] in
      let alert = UIAlertController(
        title: "Hittade",
        message: String (format:"%@", result.value, result.metadataType),
        preferredStyle: .alert


      )


      alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))

      self?.present(alert, animated: true, completion: nil)
    }
  }

webview.swift

 @IBOutlet var containerView: UIView? = nil
    var webView: WKWebView?

    override func viewDidLoad() {
        super.viewDidLoad()

  let myURL = URL(string: "MY RESULT URL HERE")
        let myRequest = URLRequest(url: myURL!)
        _ = webView?.load(myRequest)



    }

编辑感谢@sharon 的帮助!

到目前为止，我已经这样做了。但是，有一些错误信息

查看下面的链接图片

webview.swift

ViewController.swift

ViewController.swift

 func reader(_ reader: QRCodeReaderViewController, didScanResult result: QRCodeReaderResult) {
    reader.stopScanning()



    dismiss(animated: true) { [weak self] in
      let alert = UIAlertController(
        title: "Hittade",
        message: String (format:"%@", result.value, result.metadataType),
        preferredStyle: .alert

      )
        var qrLink: String?
        qrLink = "\(result.value)\(result.metadataType)"
        performSegue(withIdentifier: "WebView", sender: self)

      alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))

      self?.present(alert, animated: true, completion: nil)
    }
  }

    func prepare(for segue: UIStoryboardSegue, sender: Any?){
        if segue.identifier == "WebView" {
            let webView = segue.destination as! webview
            webView.qrLink = "%@"
        }}

  func reader(_ reader: QRCodeReaderViewController, didSwitchCamera newCaptureDevice: AVCaptureDeviceInput) {
    if let cameraName = newCaptureDevice.device.localizedName {
      print("Switching capturing to: \(cameraName)")
    }
  }

  func readerDidCancel(_ reader: QRCodeReaderViewController) {
    reader.stopScanning()

    dismiss(animated: true, completion: nil)
  }

}

webview.swift

import AVFoundation
import UIKit
import WebKit

class WebView: UIViewController, QRCodeReaderViewControllerDelegate {




    @IBOutlet var containerView: UIView? = nil
    var webView: WKWebView?

    override func viewDidLoad() {
        super.viewDidLoad()



        setNeedsStatusBarAppearanceUpdate()

        view.backgroundColor = UIColor(red: 109/255, green: 167/255, blue: 215/255, alpha: 1)

        var qrLink: String?
        var webView: UIWebView?


            super.viewDidLoad()
            let myURL = URL(string: qrLink!)
            let myRequest = URLRequest(url: myURL!)
            webView = UIWebView(frame: CGRect(x: 0, y: 0, width:
                UIScreen.main.bounds.width, height:
                UIScreen.main.bounds.height))
            webView?.loadRequest(myRequest)
            view.addSubview(webView!)




        }

    }

Answer 1

好的，首先看一下这个答案，以编程方式将您的 webView 添加到 View 中(我认为最好从 Storyboard 中的对象库中提取一个): https://stackoverflow.com/a/31651004/4301118

可能有用的简单教程:
https://medium.com/@felicity.johnson.mail/web-view-tutorial-swift-3-0-4a5f4f6858d3

接下来在您的 Storyboard中，拉出一个 UIViewController 并将其链接到 webview.swift 类(以防您还没有这样做)。

按住 Control 键从 ViewController 拖动到您刚刚拉出的新 View Controller ，并为 segue 命名任何您喜欢的名称(我将其称为“webview”)。创建属性 var qrLink: String?qrLink 将用于存储阅读器结果。现在，在 ViewController.swift 的阅读器函数中，将结果放入您刚刚添加的 qrLink 中，并通过添加这些行来触发 segue:

qrLink = "\(result.value)\(result.metadataType)"
performSegue(withIdentifier: "webview", sender: self)

像在 ViewController 中所做的那样，在您的 webview 中声明一个属性来存储 QR 链接。

接下来，也在 ViewController.swift 中添加这个函数:

func prepare(for segue: UIStoryboardSegue, sender: Any?){
    if segue.identifier == "webview" {
        let webView = segue.destination as! webview
        webView.qrLink = "YOUR READER RESULT"
}}

WebView .swift

var qrLink: String?
var webView: UIWebView?

override func viewDidLoad(){
    super.viewDidLoad()
    let myURL = URL(string: qrLink!)
    let myRequest = URLRequest(url: myURL!)
    webView = UIWebView(frame: CGRect(x: 0, y: 0, width: 
        UIScreen.main.bounds.width, height: 
        UIScreen.main.bounds.height))
    webView?.loadRequest(myRequest)
    view.addSubview(webView!)
}

希望对您有所帮助。