Xcode/Swift UIWebView

Question

内のウェブサイトを制御するユーザーをウェブアプリケーションに誘導する非常に簡単なアプリケーションを作成しました。アプリ内のページの1つで、さまざまな店舗の店舗在庫を検索できますまたは最寄りの店舗が自動的に配置されている）、ユーザーに適切なバーコードを入力するように依頼します。そのため、バーコードをキャプチャしてuiwebviewに戻すバーコードスキャナ（別のビューコントローラ）を追加しました...どのように私は自動的に特定のdivフィールドにそのバーコードを入力し、js関数を実行することができます...私はevaluatejavascriptを試みたが、ほとんど役に立たない...ほとんど放棄、あなたは私の最後の希望です！ :)

ビューコントローラ次のように...

import UIKit 
import WebKit 


class ViewController: UIViewController { 

    var webView: WebView 




    @IBOutlet weak var searchText: UITextField! 


    required init(coder aDecoder: NSCoder) { 
     self.webView = WebView() 
     super.init(coder: aDecoder)! 
    } 


    override func viewDidLoad() { 
     super.viewDidLoad() 
     view.addSubview(webView) 
     webView.setPosition(view) 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    // MARK: Actions 

    @IBAction func UseBCode(_ sender: Any) { 
     webView.FillIn() 
    } 

    @IBAction func siteHomeBtn(_ sender: UIButton) { 
     webView.setUrl("https://intranet.testsite.com/index.html") 
    } 

    @IBAction func searchBtn(_ sender: UIButton) { 
     print ("Navigating to: \(searchText.text)") 
     webView.setUrl(searchText.text) 
    } 

    @IBAction func appHomeBtn(_ sender: UIButton) { 
     webView.setUrl("https://intranet.testsite.com/index.html") 
    } 

    @IBAction func backBtn(_ sender: UIButton) { 
     webView.back() 
    } 


    @IBAction func forwardBtn(_ sender: UIButton) { 
     //webView.forward() 
    } 

    @IBAction func unwindToHomeScreen(segue: UIStoryboardSegue) { 
     dismiss(animated: true, completion: nil) 
    //webView.FillIn() 
     //webView.popup() 

    } 

    override func viewDidAppear(_ animated: Bool) { 
     webView.FillIn() 

    } 

} 


QRScannerController 

import UIKit 
import AVFoundation 

var BCode = "" 

class QRScannerController: UIViewController, AVCaptureMetadataOutputObjectsDelegate { 

    @IBOutlet var Back2: UIButton! 

    @IBOutlet var topBar: UIView! 

    @IBOutlet var messageLabel: UILabel! 



    var captureSession:AVCaptureSession? 
    var videoPreviewLayer:AVCaptureVideoPreviewLayer? 
    var qrCodeFrameView:UIView? 

    let supportedCodeTypes = [AVMetadataObjectTypeUPCECode, 
           AVMetadataObjectTypeCode39Code, 
           AVMetadataObjectTypeCode39Mod43Code, 
           AVMetadataObjectTypeCode93Code, 
           AVMetadataObjectTypeCode128Code, 
           AVMetadataObjectTypeEAN8Code, 
           AVMetadataObjectTypeEAN13Code, 
           AVMetadataObjectTypeAztecCode, 
           AVMetadataObjectTypePDF417Code, 
           AVMetadataObjectTypeQRCode] 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     // Get an instance of the AVCaptureDevice class to initialize a device object and provide the video as the media type parameter. 
     let captureDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo) 

     do { 
      // Get an instance of the AVCaptureDeviceInput class using the previous device object. 
      let input = try AVCaptureDeviceInput(device: captureDevice) 

      // Initialize the captureSession object. 
      captureSession = AVCaptureSession() 

      // Set the input device on the capture session. 
      captureSession?.addInput(input) 

      // Initialize a AVCaptureMetadataOutput object and set it as the output device to the capture session. 
      let captureMetadataOutput = AVCaptureMetadataOutput() 
      captureSession?.addOutput(captureMetadataOutput) 

      // Set delegate and use the default dispatch queue to execute the call back 
      captureMetadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main) 
      captureMetadataOutput.metadataObjectTypes = supportedCodeTypes 

      // Initialize the video preview layer and add it as a sublayer to the viewPreview view's layer. 
      videoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession) 
      videoPreviewLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill 
      videoPreviewLayer?.frame = view.layer.bounds 
      view.layer.addSublayer(videoPreviewLayer!) 

      // Start video capture. 
      captureSession?.startRunning() 

      // Move the message label and top bar to the front 
      //view.bringSubview(toFront: messageLabel) 
      view.bringSubview(toFront: topBar) 

      // Initialize QR Code Frame to highlight the QR code 
      qrCodeFrameView = UIView() 

      if let qrCodeFrameView = qrCodeFrameView { 
       qrCodeFrameView.layer.borderColor = UIColor.green.cgColor 
       qrCodeFrameView.layer.borderWidth = 2 
       view.addSubview(qrCodeFrameView) 
       view.bringSubview(toFront: qrCodeFrameView) 
      } 

     } catch { 
      // If any error occurs, simply print it out and don't continue any more. 
      print(error) 
      return 
     } 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 


    // MARK: - AVCaptureMetadataOutputObjectsDelegate Methods 

    func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) { 

     // Check if the metadataObjects array is not nil and it contains at least one object. 
     if metadataObjects == nil || metadataObjects.count == 0 { 
      qrCodeFrameView?.frame = CGRect.zero 
      //messageLabel.text = "No barcode detected" 
      return 
     } 

     // Get the metadata object. 
     let metadataObj = metadataObjects[0] as! AVMetadataMachineReadableCodeObject 

     if supportedCodeTypes.contains(metadataObj.type) { 
      // If the found metadata is equal to the QR code metadata then update the status label's text and set the bounds 
      let barCodeObject = videoPreviewLayer?.transformedMetadataObject(for: metadataObj) 
      qrCodeFrameView?.frame = barCodeObject!.bounds 

      if metadataObj.stringValue != nil { 
       messageLabel.text = "Use " + metadataObj.stringValue 

       // Copy the barcode text to the clipboard. 
       let clipboard = UIPasteboard.general 
       clipboard.string = metadataObj.stringValue 
      view.bringSubview(toFront: messageLabel) 

       BCode = metadataObj.stringValue 


       } 

      } 
     } 
    } 

Webview.script... the fillin function is me playing (to very little avail! :(

import UIKit 
import WebKit 

class WebView : WKWebView { 

    /** 
    Initialize the WKWebView. 
    */ 
    init(){ 
     let webConfig:WKWebViewConfiguration = WKWebViewConfiguration() 
     super.init(frame:CGRect.zero,configuration:webConfig) 
     self.translatesAutoresizingMaskIntoConstraints = false 
     self.allowsBackForwardNavigationGestures = true 

     createHomePage() 
    } 


    required init?(coder: NSCoder) { 
     fatalError("init(coder:) has not been implemented") 
    } 

    /** 
    Set the position for the WKWebView. 
    */ 
    func setPosition(_ view: UIView) { 
     self.translatesAutoresizingMaskIntoConstraints = false; 
     let height = NSLayoutConstraint(item: self, attribute: .height, relatedBy: .equal, toItem: view, attribute: .height, multiplier: 1, constant: -60) 
     let width = NSLayoutConstraint(item: self, attribute: .width, relatedBy: .equal, toItem: view, attribute: .width, multiplier: 1, constant: 0) 
     let top = NSLayoutConstraint(item:self,attribute: .top, relatedBy: .equal, toItem: view, attribute: .top, multiplier: 1, constant: 20) 
     view.addConstraints([height, width, top]) 
    } 

    /** 
    Set the url the webview should display. 
    */ 
    func setUrl(_ url:String!) { 
     if url != nil { 
      let url = URL(string:url) 
      let request = URLRequest(url:url!) 
      self.load(request) 
     } 
    } 

    /** 
    Create the home page. 
    */ 
    func createHomePage() { 
     self.setUrl("https://intranet.testsite.com/index.html") 
     drawHomePage() 
    } 

    /** 
    Draw the home page. 
    */ 
    func drawHomePage() { 
     let javaSCriptString="document.body.style.background=\"#ffc\"" 
     //self.loadHTMLString("<h1>Top20</h1>", baseURL: nil) 
     self.evaluateJavaScript(javaSCriptString, completionHandler: nil) 
    } 

    /** 
    Go to the home page. 
    */ 
    func setAppHome() { 
     print("The first item is \(self.findFirstItem()?.url)") 
     let item = findFirstItem() 
     if item != nil { 
      self.go(to: item!) 
      drawHomePage() 
     } 
    } 

    /** 
    Find the first item in the list of websites. 
    */ 
    func findFirstItem() -> WKBackForwardListItem? { 
     var index=0 
     if (self.backForwardList.item(at: 0)==nil) { 
      return nil 
     } 
     while self.backForwardList.item(at: index) != nil { 
      index -= 1 
     } 
     return self.backForwardList.item(at: index+1) 
    } 

    /** 
    Handle forward navigation. 
    */ 
    func forward() { 
     if self.canGoForward { 
      self.goForward() 
     } else { 
      print("Cannot go forward.") 
     } 
    } 

    /** 
    Handle backward navigation. 
    */ 
    func back(){ 
     if self.canGoBack { 
      self.goBack() 
      //self.evaluateJavaScript("document.getElementByID('barcode').innerHTML = '" + BCode + "'", completionHandler: nil) 
     } else { 
      print("Cannot go backwards.") 
     } 
    } 

    func FillIn() { 

     // fill data 
     //let savedUsername = "USERNAME" 
     //let savedPassword = "PASSWORD" 
     let javaSCriptString="document.getElementByID('barcode').innerHTML = '" + BCode + "'" 
     //self.loadHTMLString("<h1>Top20</h1>", baseURL: nil) 
     self.evaluateJavaScript(javaSCriptString, completionHandler: nil) 

     self.evaluateJavaScript("document.getElementByID('barcode').innerHTML = '" + BCode + "'") 

     let source="appfunction('" + BCode + "'" 
     //self.loadHTMLString("<h1>Top20</h1>", baseURL: nil) 
     self.evaluateJavaScript(source) 

     self.evaluateJavaScript("document.getElementByID('barcode').innerHTML = '" + BCode + "'") 
     //let javaSCriptString="functiontofindIndexByKeyValue(eval('BarCode'), 'label', '\(BCode)', 'value')" 


     let PArt = self.evaluateJavaScript(javaSCriptString) 

     let DC01Stock = self.evaluateJavaScript("functiontofindIndexByKeyValue(eval('DCStock'), 'PArt', PArt.value, 'DC01')") 

    } 
    func webView(webView: WKWebView!, didFinishNavigation navigation: WKNavigation!) { 
     UIApplication.shared.isNetworkActivityIndicatorVisible = false 

     webView.evaluateJavaScript("document.getElementById('anonymousFormSubmit').click();", completionHandler: nil) 

    } 


} 

Answer 1

はこの質問と回答を確認：

Calling Javascript using UIWebView

1. をあなたのバーコードを受信するためのJSメソッドを作成します。

2. ページが既にロードされている場合は、stringByEvaluatingJavaScriptFromStringを使用してページを呼び出すことができます。

   レットcodebar = "34244342342424234" webView.stringByEvaluatingJavaScriptFromString（ "methodNameの（" \（codebar） "）;"）

---

更新

私はこの方法でいくつかを使用しました以前の時刻：evaluateJavaScript in WKWebView、tそれはかなりだった私は常にオンラインに見つけたものが、それはまだあなたのリンクをたどった後、最後に...働くことを拒否した（そして、他の内、

var navigator : WKWebView! 

func runJS(js:String) { 
    navigator.evaluateJavaScript(js) { 
     res, error in 
     print(res ?? "no res", error ?? "no error") 
    } 
} 

@IBAction func changeBackground(_ sender: Any) { 
    navigator.evaluateJavaScript("jQuery('body').css('background', 'magenta!important')") {res, error in print(error ?? "no error buton 1")} 
} 


@IBAction func loadJQuery(_ sender: Any) { 
    //Load jQuery library using plain JavaScript 
    runJS(js: "(function(){ " + 
     "var newscript = document.createElement('script'); " + 
     "newscript.type = 'text/javascript'; " + 
     "newscript.async = true; " + 
     "newscript.src = 'https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js'; " + 
     "(document.getElementsByTagName('head')[0]||document.getElementsByTagName('body')[0]).appendChild(newscript); " + 
    "})();") 
}