⭐️ Impl: Animation Logic Scaffolding for `RNIModalSheetBottomAttached…

…OverlayController`

ios/RNIModalSheetView/RNIModalSheetBottomAttachedOverlayController.swift

@@ -68,23 +68,57 @@ extension RNIContentViewController: RNIViewLifecycle {
   }
 };
 
+extension RNIModalSheetBottomAttachedOverlayController: EntranceAnimationTransitioning {
 
+  public func createEntranceAnimationBlocks() -> (
+    start: () -> Void,
+    end: () -> Void
+  ) {
+    let initialTransform = Transform3D(
+      translateY: 100
+    );
+
+    let finalTransform = Transform3D(
+      translateY: 0
+    );
+
+    return (
+      start: {
+        //self.view.alpha = 0;
+        self.view.layer.transform = initialTransform.transform;
+      },
+      end: {
+        //self.view.alpha = 1;
+        self.view.layer.transform = finalTransform.transform;
+      }
+    );
+  };
+};
 
+extension RNIModalSheetBottomAttachedOverlayController: ExitAnimationTransitioning {
 
-public class DummyContentController: UIViewController {
-  public override func viewDidLoad() {
-    self.view.backgroundColor = .blue;
+  public func createExitAnimationBlocks() -> (
+    start: () -> Void,
+    end: () -> Void
+  ) {
 
-    let size = self.view.bounds.size;
+    let initialTransform = Transform3D(
+      translateY: 0
+    );
 
-    self.view.translatesAutoresizingMaskIntoConstraints = false;
-    NSLayoutConstraint.activate([
-      self.view.heightAnchor.constraint(equalToConstant: 100),
-    ]);
-  };
+    let finalTransform = Transform3D(
+      translateY: 100
+    );
 
-  public override func viewWillLayoutSubviews() {
-    let size = self.view.bounds.size;
-    print(size);
-  }
+    return (
+      start: {
+        //self.view.alpha = 0;
+        self.view.layer.transform = initialTransform.transform;
+      },
+      end: {
+        //self.view.alpha = 1;
+        self.view.layer.transform = finalTransform.transform;
+      }
+    );
+  };
 };

ios/RNIModalSheetView/RNIModalSheetViewController.swift

@@ -54,8 +54,15 @@ open class RNIModalSheetViewController: ModalSheetViewControllerLifecycleNotifie
 
   public override func viewIsAppearing(_ animated: Bool) {
     self.setupBottomOverlayIfNeeded();
+    super.viewIsAppearing(animated);
+    self.setupEntranceAnimation();
   };
 
+  public override func viewWillDisappear(_ animated: Bool) {
+    super.viewWillDisappear(animated);
+    self.setupExitAnimation();
+  }
+
   // MARK: Methods
   // --------------
 
@@ -123,6 +130,37 @@ open class RNIModalSheetViewController: ModalSheetViewControllerLifecycleNotifie
     self.addChild(bottomOverlayController);
     bottomOverlayController.didMove(toParent: parent);
   };
+
+  func setupEntranceAnimation(){
+    guard let transitionCoordinator = self.transitionCoordinator else {
+      return;
+    };
+
+
+    if let bottomOverlayController = self.bottomOverlayController {
+      let animationBlocks = bottomOverlayController.createEntranceAnimationBlocks();
+
+      animationBlocks.start();
+      transitionCoordinator.animate { context in
+        animationBlocks.end();
+      };
+    };
+  };
+
+  func setupExitAnimation(){
+    guard let transitionCoordinator = self.transitionCoordinator else {
+      return;
+    };
+
+    if let bottomOverlayController = self.bottomOverlayController {
+      let animationBlocks = bottomOverlayController.createExitAnimationBlocks();
+
+      animationBlocks.start();
+      transitionCoordinator.animate { context in
+        animationBlocks.end();
+      };
+    };
+  };
 };
 
 extension RNIModalSheetViewController: RNIViewLifecycle {

ios/Temp/EntranceAnimationTransitioning.swift

@@ -0,0 +1,17 @@
+//
+//  EntranceAnimationTransitioning.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 10/7/24.
+//
+
+import Foundation
+
+
+public protocol EntranceAnimationTransitioning {
+
+  func createEntranceAnimationBlocks() -> (
+    start: () -> Void,
+    end: () -> Void
+  );
+};

ios/Temp/ExitAnimationTransitioning.swift

@@ -0,0 +1,17 @@
+//
+//  ExitAnimationTransitioning.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 10/7/24.
+//
+
+import Foundation
+
+
+public protocol ExitAnimationTransitioning {
+
+  func createExitAnimationBlocks() -> (
+    start: () -> Void,
+    end: () -> Void
+  );
+};