Correct frame size on opening

Author: tuyen-vuduc

Naxam.ExpandingCollection.iOS/BasePageCollectionCell.cs

@@ -15,7 +15,7 @@ public class BasePageCollectionCell : UICollectionViewCell
 		/// </summary>
 		/// <value>The Y Offset.</value>
 		[Export("yOffset"), Browsable(true), DisplayName("Y Offset")]
-		public nfloat YOffset { get; set; }
+		public nfloat YOffset { get; set; } = 40;
 
 		const string BACK_CONTAINER_KEY = "backContainerViewKey";
 
@@ -123,7 +123,7 @@ public void CellIsOpen(bool isOpen, bool animated = true)
 			var widthConstant = BackContainerView.GetConstraint(NSLayoutAttribute.Width);
 			if (widthConstant != null)
 			{
-				widthConstant.Constant = isOpen == true ? FrontContainerView.Bounds.Size.Height + YOffset : FrontContainerView.Bounds.Size.Height;
+				widthConstant.Constant = isOpen == true ? FrontContainerView.Bounds.Size.Width + YOffset : FrontContainerView.Bounds.Size.Width;
 			}
 
 			var heightConstant = BackContainerView.GetConstraint(NSLayoutAttribute.Height);
@@ -141,7 +141,7 @@ public void CellIsOpen(bool isOpen, bool animated = true)
 				Animate(
 					duration: 0.3,
 					delay: 0,
-					options: default(UIViewAnimationOptions),
+					options: UIViewAnimationOptions.TransitionNone,
 					animation: ContentView.LayoutIfNeeded,
 					completion: null);
 			}

Naxam.ExpandingCollection.iOS/PageCollectionLayout.cs

@@ -13,7 +13,7 @@ public class PageCollectionLayout : UICollectionViewFlowLayout
 		public nfloat ScalingOffset { get; set; } = 200f;
 		public nfloat MinimumScaleFactor { get; set; } = 0.9f;
 		public nfloat MinimumAlphaFactor { get; set; } = 0.3f;
-		public bool ScaleItems { get; set; } = false;
+		public bool ScaleItems { get; set; } = true;
 
 		public PageCollectionLayout(NSCoder coder) : base(coder)
 		{

Naxam.ExpandingCollection.iOS/TransitionDriver.cs

@@ -71,7 +71,7 @@ public void PushTransitionAnimationIndex(int currentIndex,
 			UIView.Animate(
 				duration: duration,
 				delay: 0,
-				options: default(UIViewAnimationOptions),
+				options: UIViewAnimationOptions.TransitionNone,
 				animation: () =>
 				{
 					view.LayoutIfNeeded();
@@ -117,7 +117,7 @@ public void PopTransitionAnimationContantOffset(nfloat offset, UIImage backImage
 			copyCell.BackContainerView.AnimationCornerRadius(copyCell.BackContainerView.Layer.CornerRadius, duration: duration);
 			copyCell.FrontContainerView.AnimationCornerRadius(copyCell.FrontContainerView.Layer.CornerRadius, duration: duration);
 
-			UIView.Animate(duration: duration, delay: 0, options: default(UIViewAnimationOptions), animation: () =>
+			UIView.Animate(duration: duration, delay: 0, options: UIViewAnimationOptions.TransitionNone, animation: () =>
 			{
 				if (rightCell != null)
 				{
@@ -256,7 +256,7 @@ private void OpenFrontViewConfigureConstraints(BasePageCollectionCell cell, nflo
 			var widthConstraint = cell.FrontContainerView.GetConstraint(NSLayoutAttribute.Width);
 			if (widthConstraint != null)
 			{
-				width = frontViewFrame.Size.Width;
+				width = widthConstraint.Constant;
 
 				widthConstraint.Constant = view.Bounds.Size.Width;
 			}
@@ -281,7 +281,7 @@ private void OpenBackViewConfigureConstraints(BasePageCollectionCell cell, nfloa
 			var widthConstraint = cell.BackContainerView.GetConstraint(NSLayoutAttribute.Width);
 			if (widthConstraint != null)
 			{
-				width = backViewFrame.Size.Width;
+				width = widthConstraint.Constant;
 
 				widthConstraint.Constant = view.Bounds.Size.Width;
 			}