fix(Sheet): Fix dismissal bug and TestUI in Sheet

MisticaCatalog/Source/Catalog/Mistica/Components/UICatalogSheetViewController.swift

@@ -192,6 +192,7 @@ extension UICatalogSheetViewController: UITableViewDataSource, UITableViewDelega
             print("\tAction:\(sheetResponse.action)")
             print("\tSelected ids:\(sheetResponse.selectedIds)")
         }
+        viewController.delegate = sheetTransitioningDelegate
         viewController.transitioningDelegate = sheetTransitioningDelegate
         viewController.modalPresentationStyle = .custom
 
@@ -201,15 +202,18 @@ extension UICatalogSheetViewController: UITableViewDataSource, UITableViewDelega
 
 private extension UICatalogSheetViewController {
     var sheetTitle: String? {
-        titleCell.textField.text
+        guard let title = titleCell.textField.text, !title.isEmpty else { return nil }
+        return title
     }
 
     var sheetSubtitle: String? {
-        subtitleCell.textField.text
+        guard let subtitle = subtitleCell.textField.text, !subtitle.isEmpty else { return nil }
+        return subtitle
     }
 
     var sheetDescription: String? {
-        descriptionCell.textField.text
+        guard let description = descriptionCell.textField.text, !description.isEmpty else { return nil }
+        return description
     }
 
     var sheetNumElements: Int {

Sources/Mistica/Components/Sheet/SheetTransition/SheetPresentationAnimator.swift

@@ -0,0 +1,58 @@
+//
+//  SheetPresentationAnimator.swift
+//
+//  Made with ❤️ by Novum
+//
+//  Copyright © Telefonica. All rights reserved.
+//
+
+import UIKit
+
+/**
+ Basically the animator will animate the new View Controller showing it from the bottom.
+ It will be dismissed in the opposite direction.
+ */
+class SheetPresentationAnimator: NSObject {
+    private let isPresentation: Bool
+    init(isPresentation: Bool) {
+        self.isPresentation = isPresentation
+    }
+}
+
+extension SheetPresentationAnimator: UIViewControllerAnimatedTransitioning {
+    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
+        UIView.defaultAnimationDuration
+    }
+
+    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
+        let key = isPresentation ? UITransitionContextViewControllerKey.to : UITransitionContextViewControllerKey.from
+        guard let controller = transitionContext.viewController(forKey: key) else { return }
+        let animationDuration = transitionDuration(using: transitionContext)
+
+        let presentedFrame = transitionContext.finalFrame(for: controller)
+        var dismissedFrame = presentedFrame
+        dismissedFrame.origin.y = transitionContext.containerView.frame.size.height
+
+        let initialFrame: CGRect
+        let finalFrame: CGRect
+        let options: UIView.AnimationOptions
+
+        if isPresentation {
+            transitionContext.containerView.addSubview(controller.view)
+            initialFrame = dismissedFrame
+            finalFrame = presentedFrame
+            options = .curveEaseOut
+        } else {
+            initialFrame = presentedFrame
+            finalFrame = dismissedFrame
+            options = .curveEaseIn
+        }
+
+        controller.view.frame = initialFrame
+        UIView.animate(withDuration: animationDuration, delay: 0, options: options, animations: {
+            controller.view.frame = finalFrame
+        }) { _ in
+            transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
+        }
+    }
+}