Set accessibilityIgnoresInvertColors on image views

CHANGELOG.md

@@ -5,6 +5,7 @@ Changes for users of the library currently on `develop`:
 - Fixed some tests, added tests for NYTPhotoViewerSinglePhotoDataSource
 - Fixed a strict warning and a subscripting bug in NYTPhotoViewerArrayDataSource.m
 - Added support for interstitial views
+- Set `accessibilityIgnoresInvertColors = true` on image views
 
 ## [2.0.0](https://github.com/NYTimes/NYTPhotoViewer/releases/tag/2.0.0)
 

Example-Swift/ViewController.swift

@@ -32,6 +32,10 @@ final class ViewController: UIViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
 
+        if #available(iOS 11.0, *) {
+            imageButton?.accessibilityIgnoresInvertColors = true
+        }
+
         let buttonImage = UIImage(named: ReferencePhotoName)
         imageButton?.setBackgroundImage(buttonImage, for: UIControlState())
     }

Example/NYTViewController.m

@@ -30,6 +30,14 @@ @interface NYTViewController () <NYTPhotosViewControllerDelegate>
 
 @implementation NYTViewController
 
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    if (@available(iOS 11.0, *)) {
+        self.imageButton.accessibilityIgnoresInvertColors = YES;
+    }
+}
+
 - (IBAction)imageButtonTapped:(id)sender {
     self.dataSource = [self.class newTimesBuildingDataSource];
 

NYTPhotoViewer/NYTPhotoTransitionAnimator.m

@@ -120,6 +120,11 @@ - (void)performZoomingAnimationWithTransitionContext:(id <UIViewControllerContex
     if (!endingViewForAnimation) {
         endingViewForAnimation = [[self class] newAnimationViewFromView:self.endingView];
     }
+
+    if (@available(iOS 11.0, *)) {
+        startingViewForAnimation.accessibilityIgnoresInvertColors = YES;
+        endingViewForAnimation.accessibilityIgnoresInvertColors = YES;
+    }
 
     CGAffineTransform finalEndingViewTransform = self.endingView.transform;
 

NYTPhotoViewer/NYTScalingImageView.m

@@ -92,6 +92,9 @@ - (void)setupInternalImageViewWithImage:(UIImage *)image imageData:(NSData *)ima
 #else
     self.imageView = [[UIImageView alloc] initWithImage:imageToUse];
 #endif
+    if (@available(iOS 11.0, *)) {
+        self.imageView.accessibilityIgnoresInvertColors = YES;
+    }
     [self updateImage:imageToUse imageData:imageData];
 
     [self addSubview:self.imageView];