diff --git a/Source/PKRevealController/Classes/PKRevealControllerView.h b/Source/PKRevealController/Classes/PKRevealControllerView.h
index 195abd0..9ff80e8 100644
--- a/Source/PKRevealController/Classes/PKRevealControllerView.h
+++ b/Source/PKRevealController/Classes/PKRevealControllerView.h
@@ -27,7 +27,7 @@
 #import <UIKit/UIKit.h>
 #import <QuartzCore/QuartzCore.h>
 
-@interface PKRevealControllerView : UIView
+@interface PKRevealControllerView : UIView <CAAnimationDelegate>
 
 #pragma mark - Properties
 @property (nonatomic, assign, readwrite, getter = hasShadow) BOOL shadow;
diff --git a/Source/PKRevealController/Classes/PKRevealControllerView.m b/Source/PKRevealController/Classes/PKRevealControllerView.m
index 2b1fcf8..45f4166 100644
--- a/Source/PKRevealController/Classes/PKRevealControllerView.m
+++ b/Source/PKRevealController/Classes/PKRevealControllerView.m
@@ -66,6 +66,7 @@ - (void)setShadow:(BOOL)shadow
         self.layer.shadowRadius = 0.0;
         self.layer.shadowPath = nil;
     }
+    _shadow = shadow;
 }
 
 #pragma mark - API
diff --git a/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimating.h b/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimating.h
index 3a7e00f..78698ef 100644
--- a/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimating.h
+++ b/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimating.h
@@ -30,7 +30,7 @@
 typedef void(^PKAnimationStartBlock)();
 typedef void(^PKAnimationCompletionBlock)(BOOL finished);
 
-@protocol PKAnimating <NSObject>
+@protocol PKAnimating <NSObject, CAAnimationDelegate>
 
 @required
 
diff --git a/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimation.m b/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimation.m
index d13c03c..ee83bbb 100644
--- a/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimation.m
+++ b/Source/PKRevealController/Modules/PKLayerAnimator/PKAnimation.m
@@ -32,23 +32,24 @@ @implementation PKAnimation
 
 @synthesize layer = _layer;
 @synthesize animating = _animating;
-@synthesize key = _key;
+@dynamic key;
 @synthesize startHandler = _startHandler;
 @synthesize completionHandler = _completionHandler;
 
 #pragma mark - Initialization
 
-+ (id)animation
++ (instancetype)animation
 {
-    CABasicAnimation *animation = [super animation];
+    PKAnimation *animation = self.new;
     animation.delegate = animation;
     return animation;
 }
 
-+ (id)animationWithKeyPath:(NSString *)path
++ (instancetype)animationWithKeyPath:(NSString *)path
 {
-    CABasicAnimation *animation = [super animationWithKeyPath:path];
+    PKAnimation *animation = self.new;
     animation.delegate = animation;
+    animation.keyPath = path;
     return animation;
 }
 
diff --git a/Source/PKRevealController/Modules/PKLayerAnimator/PKSequentialAnimation.m b/Source/PKRevealController/Modules/PKLayerAnimator/PKSequentialAnimation.m
index 1496356..e113461 100644
--- a/Source/PKRevealController/Modules/PKLayerAnimator/PKSequentialAnimation.m
+++ b/Source/PKRevealController/Modules/PKLayerAnimator/PKSequentialAnimation.m
@@ -38,7 +38,7 @@ @implementation PKSequentialAnimation
 
 @synthesize layer = _layer;
 @synthesize animating = _animating;
-@synthesize key = _key;
+@dynamic key;
 @synthesize startHandler = _startHandler;
 @synthesize completionHandler = _completionHandler;
 
diff --git a/Source/PKRevealController/PKRevealController.m b/Source/PKRevealController/PKRevealController.m
index 6ecd223..ba58181 100644
--- a/Source/PKRevealController/PKRevealController.m
+++ b/Source/PKRevealController/PKRevealController.m
@@ -552,6 +552,7 @@ - (void)loadDefaultValues
     _leftViewWidthRange = DEFAULT_LEFT_VIEW_WIDTH_RANGE;
     _rightViewWidthRange = DEFAULT_RIGHT_VIEW_WIDTH_RANGE;
     _recognizesResetTapOnFrontViewInPresentationMode = DEFAULT_RECOGNIZES_RESET_TAP_ON_FRONT_VIEW_IN_PRESENTATION_MODE_VALUE;
+    _state = PKRevealControllerShowsFrontViewController;
 }
 
 - (void)setupContainerViews
@@ -825,7 +826,7 @@ - (CGFloat)dampenedValueForRealValue:(CGFloat)realValue inRange:(NSRange)absolut
 {
     BOOL isNegative = (realValue < 0);
     
-    realValue = fabsf(realValue);
+    realValue = fabs(realValue);
     
     // PKLog(@"Range: [%u, %u], Real Value: %f", absoluteRange.location, (absoluteRange.location + absoluteRange.length), realValue);
     
@@ -1059,7 +1060,7 @@ - (BOOL)shouldMoveFrontViewRightwardsForVelocity:(CGFloat)velocity
 
 - (BOOL)shouldMoveFrontViewLeftwardsForVelocity:(CGFloat)velocity
 {
-    return (velocity < 0 && fabsf(velocity) > self.quickSwipeVelocity);
+    return (velocity < 0 && fabs(velocity) > self.quickSwipeVelocity);
 }
 
 #pragma mark - View Controller Containment
@@ -1364,7 +1365,7 @@ - (BOOL)shouldAutorotate
     }
 }
 
-- (NSUInteger)supportedInterfaceOrientations
+- (UIInterfaceOrientationMask)supportedInterfaceOrientations
 {
     if ([self hasLeftViewController] && [self hasRightViewController])
     {