Add support for animating shadow color. (#99)

Author: jverkoey

src/MDMAnimatableKeyPaths.h

@@ -146,6 +146,16 @@ FOUNDATION_EXPORT MDMAnimatableKeyPath MDMKeyPathRotation NS_SWIFT_NAME(rotation
  */
 FOUNDATION_EXPORT MDMAnimatableKeyPath MDMKeyPathScale NS_SWIFT_NAME(scale);
 
+/**
+ Shadow color.
+
+ Equivalent UIView property: N/A
+ Equivalent CALayer property: shadowColor
+ Expected value type: UIColor or CGColor.
+ Additive animation supported: No.
+ */
+FOUNDATION_EXPORT MDMAnimatableKeyPath MDMKeyPathShadowColor NS_SWIFT_NAME(shadowColor);
+
 /**
  Shadow offset.
 

src/MDMAnimatableKeyPaths.m

@@ -26,6 +26,7 @@
 MDMAnimatableKeyPath MDMKeyPathPosition = @"position";
 MDMAnimatableKeyPath MDMKeyPathRotation = @"transform.rotation.z";
 MDMAnimatableKeyPath MDMKeyPathScale = @"transform.scale";
+MDMAnimatableKeyPath MDMKeyPathShadowColor = @"shadowColor";
 MDMAnimatableKeyPath MDMKeyPathShadowOffset = @"shadowOffset";
 MDMAnimatableKeyPath MDMKeyPathShadowOpacity = @"shadowOpacity";
 MDMAnimatableKeyPath MDMKeyPathShadowRadius = @"shadowRadius";

src/private/MDMBlockAnimations.m

@@ -37,6 +37,7 @@
                                                MDMKeyPathPosition,
                                                MDMKeyPathRotation,
                                                MDMKeyPathScale,
+                                               MDMKeyPathShadowColor,
                                                MDMKeyPathShadowOffset,
                                                MDMKeyPathShadowOpacity,
                                                MDMKeyPathShadowRadius,

tests/unit/MotionAnimatorBehavioralTests.swift

@@ -53,6 +53,7 @@ class AnimatorBehavioralTests: XCTestCase {
     .position: CGPoint(x: 50, y: 20),
     .rotation: 42,
     .scale: 2.5,
+    .shadowColor: UIColor.blue,
     .shadowOffset: CGSize(width: 1, height: 1),
     .shadowOpacity: 0.3,
     .shadowRadius: 5,

tests/unit/QuartzCoreBehavioralTests.swift

@@ -78,6 +78,7 @@ class QuartzCoreBehavioralTests: XCTestCase {
       .position: CGPoint(x: 50, y: 20),
       .rotation: 42,
       .scale: 2.5,
+      .shadowColor: UIColor.blue,
       .shadowOffset: CGSize(width: 1, height: 1),
       .shadowOpacity: 0.3,
       .shadowRadius: 5,

tests/unit/UIKitBehavioralTests.swift

@@ -141,6 +141,7 @@ class UIKitBehavioralTests: XCTestCase {
       .borderWidth: 5,
       .borderColor: UIColor.red,
       .cornerRadius: 3,
+      .shadowColor: UIColor.blue,
       .shadowOffset: CGSize(width: 1, height: 1),
       .shadowOpacity: 0.3,
       .shadowRadius: 5,
@@ -184,6 +185,7 @@ class UIKitBehavioralTests: XCTestCase {
       .position: CGPoint(x: 50, y: 20),
       .rotation: 42,
       .scale: 2.5,
+      .shadowColor: UIColor.blue,
       .shadowOffset: CGSize(width: 1, height: 1),
       .shadowOpacity: 0.3,
       .shadowRadius: 5,

tests/unit/UIKitEquivalencyTests.swift

@@ -103,6 +103,7 @@ class UIKitEquivalencyTests: XCTestCase {
       .backgroundColor: UIColor.blue,
       .borderColor: UIColor.red,
       .opacity: 0.5,
+      .shadowColor: UIColor.blue,
     ]
     for (keyPath, value) in baselineProperties {
       rebuildView()