Fix: while running in the simulator. Dapp browser's URL bar can only become first responder once

AlphaWallet/Browser/ViewControllers/BrowserViewController.swift

@@ -113,7 +113,19 @@ final class BrowserViewController: UIViewController {
     }
 
     @objc private func keyboardWillHide(notification: NSNotification) {
-        if let _ = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue, let _ = notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue {
+        //If there's a external keyboard (or on simulator with software keyboard disabled):
+        //    When text input starts. beginRect: size.height=0 endRect: size.height ~54. origin.y remains at ~812 (out of the screen)
+        //    When text input ends. beginRect: size.height ~54 endRect: size.height = 0. origin.y remains at 812 (out of the screen)
+        //Note the above. keyboardWillHide() is called for both when input starts and ends for external keyboard. Probably because the keyboard is hidden in both cases
+        guard let beginRect = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue, let endRect = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else { return }
+        let isExternalKeyboard = beginRect.origin == endRect.origin && (beginRect.size.height == 0 || endRect.size.height == 0)
+        let isEnteringEditModeWithExternalKeyboard: Bool
+        if isExternalKeyboard {
+            isEnteringEditModeWithExternalKeyboard = beginRect.size.height == 0 && endRect.size.height > 0
+        } else {
+            isEnteringEditModeWithExternalKeyboard = false
+        }
+        if !isExternalKeyboard || !isEnteringEditModeWithExternalKeyboard {
             webView.scrollView.contentInset.bottom = 0
             //Must exit editing more explicitly (and update the nav bar buttons) because tapping on the web view can hide keyboard
             delegate?.dismissKeyboard(inBrowserViewController: self)

AlphaWallet/Browser/Views/DappBrowserNavigationBar.swift

@@ -24,6 +24,7 @@ private struct Layout {
 }
 
 final class DappBrowserNavigationBar: UINavigationBar {
+    private let stackView = UIStackView()
     private let moreButton = UIButton()
     private let changeServerButton = UIButton()
     private let cancelEditingButton = UIButton()
@@ -53,6 +54,9 @@ final class DappBrowserNavigationBar: UINavigationBar {
             }
             hide.hideAll()
             show.showAll()
+            UIView.animate(withDuration: 0.3) {
+                self.stackView.layoutIfNeeded()
+            }
         }
     }
     var isBrowserOnly: Bool {
@@ -119,7 +123,7 @@ final class DappBrowserNavigationBar: UINavigationBar {
 
         changeServerButton.setContentCompressionResistancePriority(.required, for: .horizontal)
         changeServerButton.setContentHuggingPriority(.required, for: .horizontal)
-        let stackView = UIStackView(arrangedSubviews: [
+        stackView.addArrangedSubviews([
             spacer0,
             backButton,
             forwardButton,
@@ -136,7 +140,6 @@ final class DappBrowserNavigationBar: UINavigationBar {
         stackView.axis = .horizontal
         stackView.distribution = .fill
         stackView.spacing = 4
-
         addSubview(stackView)
 
         NSLayoutConstraint.activate([
@@ -200,9 +203,7 @@ final class DappBrowserNavigationBar: UINavigationBar {
         dismissKeyboard()
         switch state {
         case .editingURLTextField:
-            UIView.animate(withDuration: 0.3) {
-                self.state = .notEditingURLTextField
-            }
+            self.state = .notEditingURLTextField
         case .notEditingURLTextField, .browserOnly:
             //We especially don't want to switch (and animate) to .notEditingURLTextField when we are closing .browserOnly mode
             break
@@ -280,9 +281,7 @@ extension DappBrowserNavigationBar: UITextFieldDelegate {
     }
 
     public func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
-        UIView.animate(withDuration: 0.3) {
-            self.state = .editingURLTextField
-        }
+        self.state = .editingURLTextField
         return true
     }
 }

AlphaWallet/Core/Collection+UIView.swift

@@ -3,6 +3,17 @@
 import UIKit
 
 extension Collection where Element == UIView {
+    var alpha: CGFloat {
+        set {
+            for each in self {
+                each.alpha = alpha
+            }
+        }
+        get {
+            return 1
+        }
+    }
+
     func hideAll() {
         for each in self {
             each.isHidden = true