From 8e25af80b4c9c0dc4a05a365a869c7a7143abcfd Mon Sep 17 00:00:00 2001
From: David Jennes <djbe@users.noreply.github.com>
Date: Sun, 1 May 2016 15:14:33 +0200
Subject: [PATCH] Fix image animation transition

Implement fix mentioned in #150
---
 NYTPhotoViewer/NYTPhotoTransitionAnimator.m | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/NYTPhotoViewer/NYTPhotoTransitionAnimator.m b/NYTPhotoViewer/NYTPhotoTransitionAnimator.m
index aa80441d..dbe48c7e 100644
--- a/NYTPhotoViewer/NYTPhotoTransitionAnimator.m
+++ b/NYTPhotoViewer/NYTPhotoTransitionAnimator.m
@@ -123,7 +123,15 @@ - (void)performZoomingAnimationWithTransitionContext:(id <UIViewControllerContex
     
     CGAffineTransform finalEndingViewTransform = self.endingView.transform;
 
-    CGFloat endingViewInitialTransform = CGRectGetHeight(startingViewForAnimation.frame) / CGRectGetHeight(endingViewForAnimation.frame);
+    CGFloat endingViewInitialTransform = 1;
+    switch (self.startingView.contentMode) {
+        case UIViewContentModeScaleAspectFill:
+        case UIViewContentModeScaleToFill:
+            endingViewInitialTransform = CGRectGetWidth(startingViewForAnimation.frame) / CGRectGetWidth(endingViewForAnimation.frame);
+            break;
+        default:
+            endingViewInitialTransform = CGRectGetHeight(startingViewForAnimation.frame) / CGRectGetHeight(endingViewForAnimation.frame);
+    }
     CGPoint translatedStartingViewCenter = [[self class] centerPointForView:self.startingView
                                                   translatedToContainerView:containerView];