Fix and refactor animations options (#4880)

lib/ios/RNNAnimationConfigurationOptions.h

+#import "RNNOptions.h"
+
+@interface RNNAnimationConfigurationOptions : RNNOptions
+
+@property (nonatomic, strong) Double* from;
+@property (nonatomic, strong) Double* to;
+@property (nonatomic, strong) Double* duration;
+@property (nonatomic, strong) Double* startDelay;
+
+- (BOOL)hasAnimation;
+
+@end

lib/ios/RNNAnimationConfigurationOptions.m

+#import "RNNAnimationConfigurationOptions.h"
+
+@implementation RNNAnimationConfigurationOptions
+
+- (instancetype)initWithDict:(NSDictionary *)dict {
+	self = [super init];
+	
+	self.from = [DoubleParser parse:dict key:@"from"];
+	self.to = [DoubleParser parse:dict key:@"to"];
+	self.startDelay = [DoubleParser parse:dict key:@"startDelay"];
+	self.duration = [DoubleParser parse:dict key:@"duration"];
+	
+	return self;
+}
+
+- (BOOL)hasAnimation {
+	return self.from.hasValue && self.to.hasValue;
+}
+
+@end

lib/ios/RNNTransitionsOptions.h → lib/ios/RNNAnimationsOptions.h

 #import "RNNOptions.h"
-#import "RNNTransitionStateHolder.h"
 #import "RNNScreenTransition.h"
 
-@interface RNNTransitionsOptions : RNNOptions
+@interface RNNAnimationsOptions : RNNOptions
 
 @property (nonatomic, strong) RNNScreenTransition* push;
 @property (nonatomic, strong) RNNScreenTransition* pop;

lib/ios/RNNAnimationsOptions.m

+#import "RNNAnimationsOptions.h"
+
+@implementation RNNAnimationsOptions
+
+- (instancetype)initWithDict:(NSDictionary *)dict {
+	self = [super init];
+	
+	self.push = [[RNNScreenTransition alloc] initWithDict:dict[@"push"]];
+	self.pop = [[RNNScreenTransition alloc] initWithDict:dict[@"pop"]];
+	self.showModal = [[RNNScreenTransition alloc] initWithDict:dict[@"showModal"]];
+	self.dismissModal = [[RNNScreenTransition alloc] initWithDict:dict[@"dismissModal"]];
+	self.setStackRoot = [[RNNScreenTransition alloc] initWithDict:dict[@"setStackRoot"]];
+	self.setRoot = [[RNNScreenTransition alloc] initWithDict:dict[@"setRoot"]];
+
+	return self;
+}
+
+@end

lib/ios/RNNModalAnimation.h → lib/ios/RNNAnimationsTransitionDelegate.h

 #import <Foundation/Foundation.h>
 #import "RNNScreenTransition.h"
 
-@interface RNNModalAnimation : NSObject <UIViewControllerAnimatedTransitioning>
+@interface RNNAnimationsTransitionDelegate : NSObject <UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate>
 
 @property (nonatomic, strong) RNNScreenTransition* screenTransition;
 @property (nonatomic) BOOL isDismiss;

lib/ios/RNNAnimationsTransitionDelegate.m

+#import "RNNAnimationsTransitionDelegate.h"
+
+@implementation RNNAnimationsTransitionDelegate
+
+- (instancetype)initWithScreenTransition:(RNNScreenTransition *)screenTransition isDismiss:(BOOL)isDismiss {
+	self = [super init];
+	self.screenTransition = screenTransition;
+	self.isDismiss = isDismiss;
+	return self;
+}
+
+- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {
+	return self;
+}
+
+- (id<UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed {
+	return self;
+}
+
+- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
+	return self.screenTransition.maxDuration / 1000;
+}
+
+- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
+	UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
+	UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
+	
+	[CATransaction begin];
+	[CATransaction setCompletionBlock:^{
+		[transitionContext completeTransition:![transitionContext transitionWasCancelled]];
+	}];
+	
+	if (_isDismiss) {
+		[[transitionContext containerView] addSubview:toViewController.view];
+		[[transitionContext containerView] addSubview:fromViewController.view];
+		[self animateElement:self.screenTransition.content view:fromViewController.view elementName:@"content"];
+	} else {
+		[[transitionContext containerView] addSubview:toViewController.view];
+		[self animateElement:self.screenTransition.content view:toViewController.view elementName:@"content"];
+	}
+	
+	[CATransaction commit];
+}
+
+- (void)animationWithKeyPath:(NSString *)keyPath from:(id)from to:(id)to duration:(CFTimeInterval)duration forView:(UIView *)view animationName:(NSString *)animationName {
+	CABasicAnimation *animation = [CABasicAnimation animation];
+	animation.keyPath = keyPath;
+	animation.fromValue = from;
+	animation.toValue = to;
+	animation.duration = duration / 1000;
+	[view.layer addAnimation:animation forKey:animationName];
+}
+
+- (void)animateElement:(RNNElementTransitionOptions *)element view:(UIView *)view elementName:(NSString *)elementName {
+	[self animationWithKeyPath:@"position.x" from:@(view.layer.position.x + [element.x.from getWithDefaultValue:0]) to:@(view.layer.position.x + [element.x.to getWithDefaultValue:0]) duration:[element.x.duration getWithDefaultValue:1] forView:view animationName:@"element.position.x"];
+	[self animationWithKeyPath:@"position.y" from:@(view.layer.position.y + [element.y.from getWithDefaultValue:0]) to:@(view.layer.position.y + [element.y.to getWithDefaultValue:0]) duration:[element.y.duration getWithDefaultValue:1] forView:view animationName:[NSString stringWithFormat:@"%@.position.y", elementName]];
+	[self animationWithKeyPath:@"opacity" from:@([element.alpha.from getWithDefaultValue:1]) to:@([element.alpha.to getWithDefaultValue:1]) duration:[element.alpha.duration getWithDefaultValue:1] forView:view animationName:[NSString stringWithFormat:@"%@.alpha", elementName]];
+}
+
+@end

lib/ios/RNNAnimator.h

 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
-#import "RNNAnimationOptions.h"
+#import "RNNSharedElementAnimationOptions.h"
 
 @interface RNNAnimator : NSObject <UIViewControllerAnimatedTransitioning>
 
--(instancetype)initWithTransitionOptions:(RNNAnimationOptions *)transitionOptions;
+-(instancetype)initWithTransitionOptions:(RNNSharedElementAnimationOptions *)transitionOptions;
 
 @end

lib/ios/RNNAnimator.m

 #import "RNNTransition.h"
 
 @interface  RNNAnimator()
-@property (nonatomic, strong) RNNAnimationOptions* transitionOptions;
+@property (nonatomic, strong) RNNSharedElementAnimationOptions* transitionOptions;
 @property (nonatomic) BOOL backButton;
 @property (nonatomic, weak) UIViewController* fromVC;
 @property (nonatomic, weak) UIViewController* toVC;
 
 @implementation RNNAnimator
 
--(instancetype)initWithTransitionOptions:(RNNAnimationOptions *)transitionOptions {
+-(instancetype)initWithTransitionOptions:(RNNSharedElementAnimationOptions *)transitionOptions {
 	self = [super init];
 	if (transitionOptions.animations) {
 		[self setupTransition:transitionOptions];
 	return self;
 }
 
--(void)setupTransition:(RNNAnimationOptions *)transitionOptions {
+-(void)setupTransition:(RNNSharedElementAnimationOptions *)transitionOptions {
 	self.transitionOptions = transitionOptions;
 	if (!transitionOptions.animations) {
 		[[NSException exceptionWithName:NSInvalidArgumentException reason:@"No animations" userInfo:nil] raise];

lib/ios/RNNElementTransitionOptions.h

+#import "RNNOptions.h"
+#import "RNNAnimationConfigurationOptions.h"
+
+@interface RNNElementTransitionOptions : RNNOptions
+
+@property (nonatomic, strong) RNNAnimationConfigurationOptions* alpha;
+@property (nonatomic, strong) RNNAnimationConfigurationOptions* x;
+@property (nonatomic, strong) RNNAnimationConfigurationOptions* y;
+@property (nonatomic, strong) RNNAnimationConfigurationOptions* scaleX;
+@property (nonatomic, strong) RNNAnimationConfigurationOptions* scaleY;
+@property (nonatomic, strong) RNNAnimationConfigurationOptions* rotationX;
+@property (nonatomic, strong) RNNAnimationConfigurationOptions* rotationY;
+@property (nonatomic, strong) Bool* waitForRender;
+
+- (double)maxDuration;
+- (BOOL)hasAnimation;
+
+@end

lib/ios/RNNElementTransitionOptions.m

+#import "RNNElementTransitionOptions.h"
+
+@implementation RNNElementTransitionOptions
+
+- (instancetype)initWithDict:(NSDictionary *)dict {
+	self = [super init];
+	
+	self.alpha = [[RNNAnimationConfigurationOptions alloc] initWithDict:dict[@"alpha"]];
+	self.x = [[RNNAnimationConfigurationOptions alloc] initWithDict:dict[@"x"]];
+	self.y = [[RNNAnimationConfigurationOptions alloc] initWithDict:dict[@"y"]];
+
+	return self;
+}
+
+- (BOOL)hasAnimation {
+	return self.x.hasAnimation || self.y.hasAnimation || self.alpha.hasAnimation;
+}
+
+- (double)maxDuration {
+	double maxDuration = 0;
+	if ([_x.duration getWithDefaultValue:0] > maxDuration) {
+		maxDuration = [_x.duration getWithDefaultValue:0];
+	}
+	if ([_y.duration getWithDefaultValue:0] > maxDuration) {
+		maxDuration = [_y.duration getWithDefaultValue:0];
+	}
+	if ([_alpha.duration getWithDefaultValue:0] > maxDuration) {
+		maxDuration = [_alpha.duration getWithDefaultValue:0];
+	}
+	
+	return maxDuration;
+}
+
+@end

lib/ios/RNNModalAnimation.m

-#import "RNNModalAnimation.h"
-
-@implementation RNNModalAnimation
-
-- (instancetype)initWithScreenTransition:(RNNScreenTransition *)screenTransition isDismiss:(BOOL)isDismiss {
-	self = [super init];
-	self.screenTransition = screenTransition;
-	self.isDismiss = isDismiss;
-	
-	return self;
-}
-
-- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
-	return self.screenTransition.content.duration;
-}
-
-- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
-	UIViewController* toViewController = [transitionContext viewControllerForKey:self.isDismiss ? UITransitionContextFromViewControllerKey : UITransitionContextToViewControllerKey];
-	UIViewController* fromViewController = [transitionContext viewControllerForKey:self.isDismiss ? UITransitionContextToViewControllerKey : UITransitionContextFromViewControllerKey];
-	
-	if (self.isDismiss) {
-		[[transitionContext containerView] addSubview:fromViewController.view];
-		[[transitionContext containerView] addSubview:toViewController.view];
-	} else {
-		[[transitionContext containerView] addSubview:toViewController.view];
-	}
-	
-	[_screenTransition.content setupInitialTransitionForView:toViewController.view];
-	[_screenTransition.topBar setupInitialTransitionForView:toViewController.navigationController.navigationBar];
-	
-	
-	[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:self.screenTransition.content.startDelay options:self.screenTransition.content.interpolation animations:^{
-		[_screenTransition.content completeTransitionForView:toViewController.view];
-		[_screenTransition.topBar completeTransitionForView:toViewController.navigationController.navigationBar];
-	} completion:^(BOOL finished) {
-		[transitionContext completeTransition:![transitionContext transitionWasCancelled]];
-	}];
-}
-
-
-@end
-

lib/ios/RNNModalManager.m

 #import "RNNModalManager.h"
 #import "RNNRootViewController.h"
+#import "RNNAnimationsTransitionDelegate.h"
 
 @implementation RNNModalManager {
 	NSMutableArray* _pendingModalIdsToDismiss;
 	[self showModal:viewController animated:animated hasCustomAnimation:NO completion:completion];
 }
 
--(void)showModal:(UIViewController *)viewController animated:(BOOL)animated hasCustomAnimation:(BOOL)hasCustomAnimation completion:(RNNTransitionWithComponentIdCompletionBlock)completion {
+-(void)showModal:(UIViewController<RNNLayoutProtocol> *)viewController animated:(BOOL)animated hasCustomAnimation:(BOOL)hasCustomAnimation completion:(RNNTransitionWithComponentIdCompletionBlock)completion {
 	if (!viewController) {
 		@throw [NSException exceptionWithName:@"ShowUnknownModal" reason:@"showModal called with nil viewController" userInfo:nil];
 	}
 	UIViewController* topVC = [self topPresentedVC];
 	topVC.definesPresentationContext = YES;
 	
+	RNNAnimationsTransitionDelegate* tr = [[RNNAnimationsTransitionDelegate alloc] initWithScreenTransition:viewController.resolveOptions.animations.showModal isDismiss:NO];
 	if (hasCustomAnimation) {
-		viewController.transitioningDelegate = (UIViewController<UIViewControllerTransitioningDelegate>*)topVC;
+		viewController.transitioningDelegate = tr;
 	}
 	
 	[topVC presentViewController:viewController animated:animated completion:^{
 	}
 
 	UIViewController* topPresentedVC = [self topPresentedVC];
-
-	if ([options.animations.showModal hasCustomAnimation]) {
-		modalToDismiss.transitioningDelegate = modalToDismiss;
+	RNNAnimationsTransitionDelegate* tr = [[RNNAnimationsTransitionDelegate alloc] initWithScreenTransition:modalToDismiss.resolveOptions.animations.dismissModal isDismiss:YES];
+	if ([options.animations.dismissModal hasCustomAnimation]) {
+		[self topViewControllerParent:modalToDismiss].transitioningDelegate = tr;
 	}
 
 	if (modalToDismiss == topPresentedVC || [[topPresentedVC childViewControllers] containsObject:modalToDismiss]) {
 	return [root topViewController] ? [root topViewController] : root;
 }
 
+- (UIViewController *)topViewControllerParent:(UIViewController *)viewController {
+	UIViewController* topParent = viewController;
+	while (topParent.parentViewController) {
+		topParent = topParent.parentViewController;
+	}
+	
+	return topParent;
+}
+
 
 @end

lib/ios/RNNNavigationController.m

 
 #import "RNNNavigationController.h"
-#import "RNNModalAnimation.h"
 #import "RNNRootViewController.h"
 #import "InteractivePopGestureDelegate.h"
 
 	return [super popViewControllerAnimated:animated];
 }
 
-- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {
-	return [[RNNModalAnimation alloc] initWithScreenTransition:self.getCurrentChild.resolveOptions.animations.showModal isDismiss:NO];
-}
-
-- (id<UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed {
-	return [[RNNModalAnimation alloc] initWithScreenTransition:self.getCurrentChild.resolveOptions.animations.dismissModal isDismiss:YES];
-}
-
 - (UIViewController *)getCurrentChild {
 	return ((UIViewController<RNNParentProtocol>*)self.topViewController);
 }

lib/ios/RNNNavigationOptions.h

 #import "RNNTopTabOptions.h"
 #import "RNNTopTabsOptions.h"
 #import "RNNOverlayOptions.h"
-#import "RNNAnimationOptions.h"
-#import "RNNTransitionsOptions.h"
+#import "RNNSharedElementAnimationOptions.h"
+#import "RNNAnimationsOptions.h"
 #import "RNNStatusBarOptions.h"
 #import "RNNPreviewOptions.h"
 #import "RNNLayoutOptions.h"
 @property (nonatomic, strong) RNNTopTabOptions* topTab;
 @property (nonatomic, strong) RNNSideMenuOptions* sideMenu;
 @property (nonatomic, strong) RNNOverlayOptions* overlay;
-@property (nonatomic, strong) RNNAnimationOptions* customTransition;
-@property (nonatomic, strong) RNNTransitionsOptions* animations;
+@property (nonatomic, strong) RNNSharedElementAnimationOptions* customTransition;
+@property (nonatomic, strong) RNNAnimationsOptions* animations;
 @property (nonatomic, strong) RNNStatusBarOptions* statusBar;
 @property (nonatomic, strong) RNNPreviewOptions* preview;
 @property (nonatomic, strong) RNNLayoutOptions* layout;

lib/ios/RNNNavigationOptions.m

 	self.sideMenu = [[RNNSideMenuOptions alloc] initWithDict:dict[@"sideMenu"]];
 	self.splitView = [[RNNSplitViewOptions alloc] initWithDict:dict[@"splitView"]];
 	self.overlay = [[RNNOverlayOptions alloc] initWithDict:dict[@"overlay"]];
-	self.customTransition = [[RNNAnimationOptions alloc] initWithDict:dict[@"customTransition"]];
-	self.animations = [[RNNTransitionsOptions alloc] initWithDict:dict[@"animations"]];
+	self.customTransition = [[RNNSharedElementAnimationOptions alloc] initWithDict:dict[@"customTransition"]];
+	self.animations = [[RNNAnimationsOptions alloc] initWithDict:dict[@"animations"]];
 	self.statusBar = [[RNNStatusBarOptions alloc] initWithDict:dict[@"statusBar"]];
 	self.preview = [[RNNPreviewOptions alloc] initWithDict:dict[@"preview"]];
 	self.layout = [[RNNLayoutOptions alloc] initWithDict:dict[@"layout"]];

lib/ios/RNNPushAnimation.h

 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
-#import "RNNModalAnimation.h"
+#import "RNNScreenTransition.h"
 
-@interface RNNPushAnimation : RNNModalAnimation <UIViewControllerAnimatedTransitioning>
+@interface RNNPushAnimation : NSObject <UIViewControllerAnimatedTransitioning>
+
+@property (nonatomic, strong) RNNScreenTransition* screenTransition;
 
 - (instancetype)initWithScreenTransition:(RNNScreenTransition *)screenTransition;
 

lib/ios/RNNPushAnimation.m

 - (instancetype)initWithScreenTransition:(RNNScreenTransition *)screenTransition {
 	self = [super init];
 	self.screenTransition = screenTransition;
-	
 	return self;
 }
 
 - (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
-	return self.screenTransition.content.duration;
+	return self.screenTransition.maxDuration / 1000;
 }
 
 - (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
+	UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
 	UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
 	
+	[[transitionContext containerView] addSubview:fromViewController.view];
 	[[transitionContext containerView] addSubview:toViewController.view];
 	
-	[self.screenTransition.content setupInitialTransitionForView:toViewController.view];
-	[self.screenTransition.topBar setupInitialTransitionForView:toViewController.navigationController.navigationBar];
-	[self.screenTransition.bottomTabs setupInitialTransitionForView:toViewController.tabBarController.tabBar];
-	
-	
-	[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:self.screenTransition.content.startDelay options:self.screenTransition.content.interpolation animations:^{
-		[self.screenTransition.content completeTransitionForView:toViewController.view];
-		[self.screenTransition.topBar completeTransitionForView:toViewController.navigationController.navigationBar];
-		[self.screenTransition.bottomTabs completeTransitionForView:toViewController.tabBarController.tabBar];
-	} completion:^(BOOL finished) {
+	[CATransaction begin];
+	[CATransaction setCompletionBlock:^{
 		[transitionContext completeTransition:![transitionContext transitionWasCancelled]];
 	}];
+
+	[self animateElement:self.screenTransition.topBar view:toViewController.navigationController.navigationBar elementName:@"topBar"];
+	[self animateElement:self.screenTransition.content view:toViewController.view elementName:@"content"];
+	[self animateElement:self.screenTransition.bottomTabs view:toViewController.tabBarController.tabBar elementName:@"bottomTabs"];
+	
+	[CATransaction commit];
+}
+
+- (void)animationWithKeyPath:(NSString *)keyPath from:(id)from to:(id)to duration:(CFTimeInterval)duration forView:(UIView *)view animationName:(NSString *)animationName {
+	CABasicAnimation *animation = [CABasicAnimation animation];
+	animation.keyPath = keyPath;
+	animation.fromValue = from;
+	animation.toValue = to;
+	animation.duration = duration / 1000;
+	[view.layer addAnimation:animation forKey:animationName];
 }
 
+- (void)animateElement:(RNNElementTransitionOptions *)element view:(UIView *)view elementName:(NSString *)elementName {
+	[self animationWithKeyPath:@"position.x" from:@(view.layer.position.x + [element.x.from getWithDefaultValue:0]) to:@(view.layer.position.x + [element.x.to getWithDefaultValue:0]) duration:[element.x.duration getWithDefaultValue:1] forView:view animationName:@"element.position.x"];
+	[self animationWithKeyPath:@"position.y" from:@(view.layer.position.y + [element.y.from getWithDefaultValue:0]) to:@(view.layer.position.y + [element.y.to getWithDefaultValue:0]) duration:[element.y.duration getWithDefaultValue:1] forView:view animationName:[NSString stringWithFormat:@"%@.position.y", elementName]];
+	[self animationWithKeyPath:@"opacity" from:@([element.alpha.from getWithDefaultValue:1]) to:@([element.alpha.to getWithDefaultValue:1]) duration:[element.alpha.duration getWithDefaultValue:1] forView:view animationName:[NSString stringWithFormat:@"%@.alpha", elementName]];
+}
 
 @end

lib/ios/RNNRootViewController.m

 #import "RNNPushAnimation.h"
 #import "RNNReactView.h"
 #import "RNNParentProtocol.h"
-
+#import "RNNAnimationsTransitionDelegate.h"
 
 @implementation RNNRootViewController
 
 	if (self.animator) {
 		return self.animator;
 	} else if (operation == UINavigationControllerOperationPush && self.resolveOptions.animations.push.hasCustomAnimation) {
-		return [[RNNPushAnimation alloc] initWithScreenTransition:self.resolveOptions.animations.push];
+		return [[RNNAnimationsTransitionDelegate alloc] initWithScreenTransition:self.resolveOptions.animations.push isDismiss:NO];
 	} else if (operation == UINavigationControllerOperationPop && self.resolveOptions.animations.pop.hasCustomAnimation) {
-		return [[RNNPushAnimation alloc] initWithScreenTransition:self.resolveOptions.animations.pop];
+		return [[RNNAnimationsTransitionDelegate alloc] initWithScreenTransition:self.resolveOptions.animations.pop isDismiss:YES];
 	} else {
 		return nil;
 	}
 	return nil;
 }
 
-- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {
-	return [[RNNModalAnimation alloc] initWithScreenTransition:self.resolveOptions.animations.showModal isDismiss:NO];
-}
-
-- (id<UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed {
-	return [[RNNModalAnimation alloc] initWithScreenTransition:self.resolveOptions.animations.dismissModal isDismiss:YES];
-}
-
 - (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location{
 	return self.previewController;
 }
 
-
 - (void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
 	if (self.previewCallback) {
 		self.previewCallback(self);

lib/ios/RNNScreenTransition.h

 #import "RNNOptions.h"
-#import "RNNTransitionStateHolder.h"
+#import "RNNElementTransitionOptions.h"
 
 @interface RNNScreenTransition : RNNOptions
 
-@property (nonatomic, strong) RNNTransitionStateHolder* topBar;
-@property (nonatomic, strong) RNNTransitionStateHolder* content;
-@property (nonatomic, strong) RNNTransitionStateHolder* bottomTabs;
+@property (nonatomic, strong) RNNElementTransitionOptions* topBar;
+@property (nonatomic, strong) RNNElementTransitionOptions* content;
+@property (nonatomic, strong) RNNElementTransitionOptions* bottomTabs;
 
 @property (nonatomic, strong) Bool* enable;
 @property (nonatomic, strong) Bool* waitForRender;
 
 - (BOOL)hasCustomAnimation;
+- (double)maxDuration;
 
 @end

lib/ios/RNNScreenTransition.m

 - (instancetype)initWithDict:(NSDictionary *)dict {
 	self = [super init];
 
-	self.topBar = dict[@"topBar"] ? [[RNNTransitionStateHolder alloc] initWithDict:dict[@"topBar"]] : nil;
-	self.content = dict[@"content"] ? [[RNNTransitionStateHolder alloc] initWithDict:dict[@"content"]] : nil;
-	self.bottomTabs = dict[@"bottomTabs"] ? [[RNNTransitionStateHolder alloc] initWithDict:dict[@"bottomTabs"]] : nil;
+	self.topBar = [[RNNElementTransitionOptions alloc] initWithDict:dict[@"topBar"]];
+	self.content = [[RNNElementTransitionOptions alloc] initWithDict:dict[@"content"]];
+	self.bottomTabs = [[RNNElementTransitionOptions alloc] initWithDict:dict[@"bottomTabs"]];
 	self.enable = [BoolParser parse:dict key:@"enabled"];
 	self.waitForRender = [BoolParser parse:dict key:@"waitForRender"];
 
 }
 
 - (BOOL)hasCustomAnimation {
-	return (self.topBar || self.content || self.bottomTabs);
+	return (self.topBar.hasAnimation || self.content.hasAnimation || self.bottomTabs.hasAnimation);
+}
+
+- (double)maxDuration {
+	double maxDuration = 0;
+	if ([self.topBar maxDuration] > 0) {
+		maxDuration = [self.topBar maxDuration];
+	}
+	if ([self.content maxDuration] > 0) {
+		maxDuration = [self.content maxDuration];
+	}
+	if ([self.bottomTabs maxDuration] > 0) {
+		maxDuration = [self.bottomTabs maxDuration];
+	}
+	
+	return maxDuration;
 }
 
 @end

lib/ios/RNNAnimationOptions.h → lib/ios/RNNSharedElementAnimationOptions.h

 #import "RNNOptions.h"
 
-@interface RNNAnimationOptions : RNNOptions
+@interface RNNSharedElementAnimationOptions : RNNOptions
 
 @property (nonatomic, strong) NSArray* animations;
 @property (nonatomic, strong) NSNumber* duration;

lib/ios/RNNAnimationOptions.m → lib/ios/RNNSharedElementAnimationOptions.m

-#import "RNNAnimationOptions.h"
+#import "RNNSharedElementAnimationOptions.h"
 
 #define DEFAULT_DURATION @(0.7)
 #define DEFAULT_SPRING_VELOCITY @(0.8)
 #define DEFAULT_SPRING_DAMPING @(0.85)
 
-@implementation RNNAnimationOptions
+@implementation RNNSharedElementAnimationOptions
 
 - (instancetype)initWithDict:(NSDictionary *)dict {
 	self = [super init];

lib/ios/RNNTransitionsOptions.m

-#import "RNNTransitionsOptions.h"
+#import "RNNAnimationsOptions.h"
 
-@implementation RNNTransitionsOptions
+@implementation RNNAnimationsOptions
 
 - (instancetype)initWithDict:(NSDictionary *)dict {
 	self = [super init];

lib/ios/ReactNativeNavigation.xcodeproj/project.pbxproj

 		50415CBB20553B8E00BB682E /* RNNScreenTransition.m in Sources */ = {isa = PBXBuildFile; fileRef = 50415CB920553B8E00BB682E /* RNNScreenTransition.m */; };
 		50451D052042DAEB00695F00 /* RNNPushAnimation.h in Headers */ = {isa = PBXBuildFile; fileRef = 50451D032042DAEB00695F00 /* RNNPushAnimation.h */; };
 		50451D062042DAEB00695F00 /* RNNPushAnimation.m in Sources */ = {isa = PBXBuildFile; fileRef = 50451D042042DAEB00695F00 /* RNNPushAnimation.m */; };
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