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I thought a lot about this problem. So my conclusion is history.back() does not change the value of the bounce. Therefore, the bounce value is false.So I thought I should reinitialize this value. So I added a function in the section that completes page navigation.func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { if currentHtmlFileName == "Main.html" { scrollViewDidScroll(myWebView.scrollView) } }With this addition, the bounce value was reinitialized, and my refresh worked.

Turned out to be a bug, due to multiple installs and deletions of the app on the iPhone, so a simple iPhone restart fixed the bug, and it was able to register for notifications, and in the end, called the didRegisterForRemoteNotificationsWithDeviceToken delegate method.

Just like the code you wrote in your answer, I changed my code the same way, and I got the following error.Reference to generic type 'Dictionary' requires arguments inInsert '<<#Key: Hashable#>, Any>'Click the fix button to change:Dictionary<<#Key: Hashable#>, Any>When creating a Dictionary, it appears that I must specify a type by default.Dictionary Examplevar dic : [Int : String] = [:] var dic2 = [Int : String]() var dic3 : Dictionary = [Int:String]() var dic4 : Dictionary<int, string=""> = Dictionary<int, string="">()But as you can see from my question, this is how I've already tried.let getdata = message.body as! [String : Any] print(getdata)

I tried change value But get errorfunc apiCall(_ param: Dictionary) { Reference to generic type 'Dictionary' requires arguments inInsert '<<#Key: Hashable#>, Any>'

I think I found a solution. But there's a problem. I can still see the animate image of the indicator. I don't think the search is complete.First WKWebView var openSecondScreen : SecondWebViewController! var preloadCheck = false ... func openSecondScreen(){ let storyboard = UIStoryboard(name: "Main", bundle: nil) openSecondScreen = storyboard.instantiateViewController(withIdentifier: "SecondWebViewController") as! SecondWebViewController openSecondScreen.delegate = self openSecondScreen.loadViewIfNeeded() openSecondScreen.secondWKWebView.uiDelegate = self openSecondScreen.secondWKWebView.navigationDelegate = self preloadCheck = true }.... func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { if preloadCheck { self.navigationController?.pushViewController(openSecondScreen, animated: true) preloadCheck = false } }Second WKWebViewfunc webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { indicatorImage.isHidden = true indicatorImage.stopAnimating() }So I solved the problem by concealing an indicator image when the screen was shown.Second WKWebViewoverride func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) indicatorImage.isHidden = true indicatorImage.stopAnimating() }When you press the button to open the secondWebview screen, indicator images are displayed on the firstWebview screen, indicator images disappear when navigation is complete, and the secondWebview screen appears preloaded.

I separated the QR code scanning function into another ViewController.move QRcode ScanScreenlet storyboard = UIStoryboard(name: "Main", bundle: nil) let qrcode = storyboard.instantiateViewController(withIdentifier: "QRcodeViewController") as! QRcodeViewController qrcode.modalPresentationStyle = .overCurrentContext qrcode.modalTransitionStyle = .crossDissolve qrcode.delegate = self self.present(qrcode, animated: false, completion: nil)QRcodeViewControllerimport Foundation import UIKit import AVFoundation class QRcodeScannerViewController : UIViewController, AVCaptureMetadataOutputObjectsDelegate { var captureSession: AVCaptureSession! var previewLayer: AVCaptureVideoPreviewLayer! weak var delegate: SendQrcodeDataControllerDelegate? override func viewDidLoad() { super.viewDidLoad() view.backgroundColor = UIColor.black 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 { failed() return } let metadataOutput = AVCaptureMetadataOutput() if (captureSession.canAddOutput(metadataOutput)) { captureSession.addOutput(metadataOutput) metadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main) metadataOutput.metadataObjectTypes = [.qr] } else { failed() return } previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) previewLayer.frame = view.layer.bounds previewLayer.videoGravity = .resizeAspectFill view.layer.addSublayer(previewLayer) captureSession.startRunning() } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) if (captureSession?.isRunning == false) { captureSession.startRunning() } } override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) if (captureSession?.isRunning == true) { captureSession.stopRunning() } } 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) } self.dismiss(animated: true, completion: nil) } func found(code: String) { print(code) } func failed() { print("can not support camera") captureSession = nil } override var prefersStatusBarHidden: Bool { return true } override var supportedInterfaceOrientations: UIInterfaceOrientationMask { return .portrait } }

The two codes are within the same controller class.class WebViewController: UIViewController, WKUIDelegate, WKScriptMessageHandler, UIImagePickerControllerDelegate, UINavigationControllerDelegate, SKProductsRequestDelegate, UIScrollViewDelegate, AVCaptureMetadataOutputObjectsDelegate {