Implement zoom in ScrollView

sammy-SC · facebook-github-bot · commit 3a0ed2e5510e · 2020-11-17T11:16:42.000-08:00
Summary: changelog: [internal]

Reviewed By: JoshuaGross

Differential Revision: D24991161

fbshipit-source-id: 6f36cc21b89554006a744da8d32349ff21ccd68f
diff --git a/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm b/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm
@@ -452,7 +452,12 @@ - (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(nullable UI
   [self _updateStateWithContentOffset];
 }
 
-#pragma mark - UIScrollViewDelegate
+- (UIView *)viewForZoomingInScrollView:(__unused UIScrollView *)scrollView
+{
+  return _containerView;
+}
+
+#pragma mark -
 
 - (void)_forceDispatchNextScrollEvent
 {

Original file line number	Diff line number	Diff line change
`@@ -452,7 +452,12 @@ - (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(nullable UI`
`452`	`452`	`[self _updateStateWithContentOffset];`
`453`	`453`	`}`
`454`	`454`
`455`		`-#pragma mark - UIScrollViewDelegate`
	`455`	`+- (UIView )viewForZoomingInScrollView:(__unused UIScrollView )scrollView`
	`456`	`+{`
	`457`	`+ return _containerView;`
	`458`	`+}`
	`459`	`+`
	`460`	`+#pragma mark -`
`456`	`461`
`457`	`462`	`- (void)_forceDispatchNextScrollEvent`
`458`	`463`	`{`