Allow for swiping between conjugation and declension views scribe-org…

…#361

Keyboards/KeyboardsBase/KeyboardViewController.swift

@@ -1207,6 +1207,13 @@ class KeyboardViewController: UIInputViewController {
 
   /// Sets up all buttons and labels for the conjugation view given constraints to determine the dimensions.
   func setConjugationBtns() {
+    // add swipe functionality to the conjugation and declension views
+    let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(shiftLeft))
+    keyboardView.addGestureRecognizer(swipeRight)
+    let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(shiftRight))
+    swipeLeft.direction = .left
+    keyboardView.addGestureRecognizer(swipeLeft)
+
     // Set the conjugation view to 2x2 for Swedish and Russian past tense.
     if controllerLanguage == "Swedish" {
       formsDisplayDimensions = .view2x2
@@ -1572,6 +1579,24 @@ class KeyboardViewController: UIInputViewController {
       typedWordAnnotation(KVC: self)
     }
   }
+
+  @objc func shiftLeft() {
+    if commandState == .displayInformation {
+      tipView?.updatePrevious()
+    } else {
+      conjugationStateLeft()
+      loadKeys()
+    }
+  }
+
+  @objc func shiftRight() {
+    if commandState == .displayInformation {
+      tipView?.updateNext()
+    } else {
+      conjugationStateRight()
+      loadKeys()
+    }
+  }
 
   func setKeywidth() {
     // keyWidth determined per keyboard by the top row.
@@ -2256,20 +2281,10 @@ class KeyboardViewController: UIInputViewController {
       commandBar.attributedText = pluralPromptAndColorPlaceholder
 
     case "shiftFormsDisplayLeft":
-      if commandState == .displayInformation {
-        tipView?.updatePrevious()
-      } else {
-        conjugationStateLeft()
-        loadKeys()
-      }
+      shiftLeft()
 
     case "shiftFormsDisplayRight":
-      if commandState == .displayInformation {
-        tipView?.updateNext()
-      } else {
-        conjugationStateRight()
-        loadKeys()
-      }
+      shiftRight()
 
     case "firstPersonSingular":
       returnConjugation(keyPressed: sender, requestedForm: formFPS)