development: adjusted rotation MotionTransition to snapshot the current state.

Sources/iOS/Material+UIFont.swift

@@ -32,10 +32,14 @@ import UIKit
 
 extension UIFont {
 	/**
-	:name:	stringSize
-	*/
-	open func stringSize(string: String, constrainedToWidth width: Double) -> CGSize {
-		return string.boundingRect(with: CGSize(width: width, height: DBL_MAX),
+     Calculates a CGSize value based on a width and length of a string with a
+     given UIFont.
+     - Parameter string: A String.
+     - Parameter constrainedTo width: A CGFloat.
+     - Returns a CGSize.
+     */
+    open func stringSize(string: String, constrainedTo width: CGFloat) -> CGSize {
+		return string.boundingRect(with: CGSize(width: width, height: CGFloat(DBL_MAX)),
 			options: NSStringDrawingOptions.usesLineFragmentOrigin,
 			attributes: [NSFontAttributeName: self],
 			context: nil).size

Sources/iOS/MotionTransition.swift

@@ -378,13 +378,8 @@ open class MotionTransitionPresentedAnimator: MotionTransitionAnimator {
                     
                     let rotateAnimation = Motion.rotate(angle: toView.layer.value(forKeyPath: MotionAnimationKeyPath.rotation.rawValue) as? CGFloat ?? 0)
                     rotateAnimation.fromValue = fromView.layer.value(forKeyPath: MotionAnimationKeyPath.rotation.rawValue) as? CGFloat ?? 0
-                    snapshotChildAnimations.append(rotateAnimation)
+                    snapshotAnimations.append(rotateAnimation)
                     
-//                    let backgroundColorAnimation = Motion.background(color: toView.backgroundColor ?? .clear)
-//                    backgroundColorAnimation.fromValue = fromView.backgroundColor?.cgColor
-//                    snapshotAnimations.append(backgroundColorAnimation)
-//                    snapshotChildAnimations.append(backgroundColorAnimation)
-//                    
                     let cornerRadiusAnimation = Motion.corner(radius: toView.cornerRadius)
                     snapshotAnimations.append(cornerRadiusAnimation)
                     snapshotChildAnimations.append(cornerRadiusAnimation)
@@ -499,9 +494,7 @@ open class MotionTransitionDismissedAnimator: MotionTransitionAnimator {
                     
                     let rotateAnimation = Motion.rotate(angle: toView.layer.value(forKeyPath: MotionAnimationKeyPath.rotation.rawValue) as? CGFloat ?? 0)
                     rotateAnimation.fromValue = fromView.layer.value(forKeyPath: MotionAnimationKeyPath.rotation.rawValue) as? CGFloat ?? 0
-                    snapshotChildAnimations.append(rotateAnimation)
-                    
-                    snapshotChildAnimations.append(Motion.background(color: toView.backgroundColor ?? .clear))
+                    snapshotAnimations.append(rotateAnimation)
                     
                     let cornerRadiusAnimation = Motion.corner(radius: toView.cornerRadius)
                     snapshotAnimations.append(cornerRadiusAnimation)