bug fix

ios/Runner/ScannerViewController.swift

@@ -18,24 +18,107 @@ extension ZBarSymbolSet: Sequence {
     }
 }
 
-@objc class ScannerViewController: UIViewController, ZBarReaderDelegate {
+@objc class ScannerViewController: UIViewController, ZBarReaderDelegate, UITextFieldDelegate {
     var platformChannel: FlutterMethodChannel?
+    let readerViewController = ZBarReaderViewController()
+    
+    //Вьюшка для верхнего меню
+    let topView = UIView()
+    
+    //Окно ввода кода
+    let textField = UITextField()
+    
+    //Кнопка настроек
+    var settingButton: UIButton!
     
     override func viewDidLoad() {
         super.viewDidLoad()
-    }
 
-    override func viewDidAppear(_ animated: Bool) {
-        super.viewDidAppear(animated)
-        let readerViewController = ZBarReaderViewController()
         readerViewController.readerDelegate = self
         readerViewController.readerView.zoom = 1.0
-        readerViewController.showsZBarControls = true
-        self.present(readerViewController, animated: true)
+        readerViewController.showsZBarControls = false
+        
+        settingButton = UIButton(type: .system)
+        settingButton.addTarget(self, action: #selector(ScannerViewController.buttonTouch), for: .touchUpInside)
+        
+        self.addChildViewController(readerViewController)
+        self.view.addSubview(readerViewController.view)
+        
+        readerViewController.view.addSubview(topView)
+        topView.addSubview(textField)
+        topView.addSubview(settingButton)
+        
+        textField.delegate = self
+        textField.keyboardType = .numberPad
+        
+        //Looks for single or multiple taps.
+        let tap = UITapGestureRecognizer(target: self, action: #selector(ScannerViewController.hideKeyboard))
+        readerViewController.view.addGestureRecognizer(tap)
+        
     }
-
-   
     
+    func hideKeyboard() {
+        view.endEditing(false)
+    }
+    
+    func buttonTouch(){
+        
+        sendResult(textField.text!)
+        
+    }
+    
+    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
+
+        sendResult(textField.text!)
+        
+        return true
+    }
+    
+    func sendResult(_ str: String) {
+        platformChannel?.invokeMethod("findUserAndPurchase", arguments: [str], result: { (result: Any?) in
+            if result is FlutterError {
+                self.showErrorAlert()
+            } else {
+                self.presentingViewController?.dismiss(animated: false, completion: { self.dismiss(animated: true) })
+            }
+            print("result: \(result.debugDescription )")
+        })
+
+    }
+    
+    func showErrorAlert() {
+        let alertController = UIAlertController(title: "Error", message:
+            "Wrong code", preferredStyle: UIAlertControllerStyle.alert)
+        alertController.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.default,handler: nil))
+        
+        self.present(alertController, animated: true, completion: nil)
+        
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        
+        topView.backgroundColor = UIColor.white
+        settingButton.setTitle("+", for: .normal)
+        textField.placeholder = "Enter code"
+        textField.borderStyle = .roundedRect
+        
+        //self.present(readerViewController, animated: true)
+        
+        super.viewWillAppear(animated)
+    }
+    
+    override func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+    }
+    
+    override func viewWillLayoutSubviews() {
+        
+        readerViewController.view.frame = view.bounds
+        topView.frame = CGRect(x: 0, y: 0, width: readerViewController.view.frame.size.width, height: 40)
+        textField.frame = CGRect(x: 8, y: 5, width: readerViewController.view.frame.size.width - 50, height: 30)
+        settingButton.frame = CGRect(x: textField.frame.maxX + 8, y: 10, width: 20, height: 20)
+        
+     }
     
     func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
         guard let symbols = info[ZBarReaderControllerResults] as? ZBarSymbolSet else { return }
@@ -43,30 +126,36 @@ extension ZBarSymbolSet: Sequence {
         for symbol in symbols {
 
             if let symbol = symbol as? ZBarSymbol, let data = symbol.data {
-                
+                sendResult(data)
+/*
                 if let platformChannel = self.platformChannel {
-                    self.dismiss(animated: true, completion: {
-                        self.presentingViewController?.dismiss(animated: true, completion: {
+                   // self.dismiss(animated: true, completion: {
+                     //   self.presentingViewController?.dismiss(animated: true, completion: {
                             platformChannel.invokeMethod("findUserAndPurchase", arguments: [data], result: { (result: Any?) in
-                                print("\(result ?? "")")
+                                
+                                print("result: \(result ?? "")")
+                                self.presentingViewController?.dismiss(animated: false, completion: { self.dismiss(animated: true) })
                             })
-                        })
-                    })
+                       // })
+                   // })
 //                    let result = platformChannel.invokeMethod("getUserByCode", arguments: [data], handleResult(result: FlutterResult))
 //                    print(result);
                 }
-                
-//                let toast = UIAlertView()
-//                toast.message = data
-//                toast.show()
-
-                navigationController?.popViewController(animated: true)
+                /*
+                let toast = UIAlertController()
+                toast.message = data
+                toast.add
+                toast.show()
+*/
+                //navigationController?.popViewController(animated: true)
+ */
             }
         }
-        navigationController?.popViewController(animated: true)
+        //navigationController?.popViewController(animated: true)
 
     }
 
+    
     override func didReceiveMemoryWarning() {
         super.didReceiveMemoryWarning()
     }