Add card wiggling animation loop

37-watchkit-game-esp-tester/ESP Tester/ESP Tester/Controllers/Home/CardViewController.swift

@@ -35,13 +35,8 @@ class CardViewController: UIViewController {
         })
     }
     
+    // MARK: - Methods
     
-    // MARK: - Event handling
-    
-    @objc func cardTapped(_ sender: UIGestureRecognizer) {
-        delegate.cardTapped(self)
-    }
-
     @objc func flipToReveal() {
         UIView.transition(
             with: view,
@@ -62,6 +57,34 @@ class CardViewController: UIViewController {
         })
     }
     
+    
+    @objc func wiggle() {
+        UIView.animate(
+            withDuration: 0.25,
+            delay: 0,
+            options: [.allowUserInteraction],
+            animations: { [weak self] in
+                self?.backImageView.transform = CGAffineTransform(
+                    scaleX: 1.04, y: 1.04
+                ).concatenating(
+                    CGAffineTransform(rotationAngle: (6.6 / 180.0) * .pi)
+                ).concatenating(
+                    CGAffineTransform(rotationAngle: -(6.6 / 180.0) * .pi)
+                )
+            },
+            completion: { [weak self] _ in
+                self?.backImageView.transform = CGAffineTransform.identity
+            }
+        )
+    }
+
+
+    // MARK: - Event handling
+    
+    @objc func cardTapped(_ sender: UIGestureRecognizer) {
+        delegate.cardTapped(self)
+    }
+
 
     /*
     // MARK: - Navigation

37-watchkit-game-esp-tester/ESP Tester/ESP Tester/Controllers/Home/HomeViewController.swift

@@ -35,6 +35,10 @@ class HomeViewController: UIViewController {
         
         setupBackground()
         loadCards()
+        setupWiggling()
+        playBackgroundMusic()
+        
+        currentCardState = .allFlat
     }
     
     
@@ -67,8 +71,6 @@ class HomeViewController: UIViewController {
             
             cardViewControllers.append(cardViewController)
         }
-        
-        currentCardState = .allFlat
     }
     
     
@@ -118,6 +120,28 @@ class HomeViewController: UIViewController {
     }
     
     
+    func setupWiggling() {
+        cardViewControllers.forEach({ card in
+            perform(#selector(wiggle), with: card, afterDelay: Double.random(in: 0...10))
+        })
+    }
+    
+    @objc func wiggle(_ card: CardViewController) {
+        card.wiggle()
+        
+        if Int.random(in: 0...1) == 1 {
+            perform(#selector(wiggle), with: card, afterDelay: Double.random(in: 1...2))
+        } else {
+            perform(#selector(wiggle), with: card, afterDelay: Double.random(in: 7...10))
+        }
+    }
+    
+    
+    func playBackgroundMusic() {
+        
+    }
+    
+    
     // MARK: - Private functions
     
     private func makeCardPositions() -> [CGPoint] {