Fix crash when gallery is dismissed while upates are pending.

Zev Eisenberg · Zev Eisenberg · commit f0dfe9ac5813 · 2018-01-23T20:22:49.000-05:00
diff --git a/RIGImageGallery/RIGImageGalleryViewController.swift b/RIGImageGallery/RIGImageGalleryViewController.swift
@@ -310,9 +310,10 @@ private extension RIGImageGalleryViewController {
         for viewController in childViewControllers {
             if let index = indexOf(viewController: viewController, imagesArray: oldValue),
                 let childView = viewController as? RIGSingleImageViewController, index < images.count {
-                DispatchQueue.main.async { [unowned self] in
-                    childView.viewerItem = self.images[index]
-                    childView.scrollView.baseInsets = self.scrollViewInset
+                DispatchQueue.main.async { [weak self] in
+                    guard let strongSelf = self else { return }
+                    childView.viewerItem = strongSelf.images[index]
+                    childView.scrollView.baseInsets = strongSelf.scrollViewInset
                 }
             }
         }

Original file line number	Diff line number	Diff line change
`@@ -310,9 +310,10 @@ private extension RIGImageGalleryViewController {`
`310`	`310`	`for viewController in childViewControllers {`
`311`	`311`	`if let index = indexOf(viewController: viewController, imagesArray: oldValue),`
`312`	`312`	`let childView = viewController as? RIGSingleImageViewController, index < images.count {`
`313`		`- DispatchQueue.main.async { [unowned self] in`
`314`		`- childView.viewerItem = self.images[index]`
`315`		`- childView.scrollView.baseInsets = self.scrollViewInset`
	`313`	`+ DispatchQueue.main.async { [weak self] in`
	`314`	`+ guard let strongSelf = self else { return }`
	`315`	`+ childView.viewerItem = strongSelf.images[index]`
	`316`	`+ childView.scrollView.baseInsets = strongSelf.scrollViewInset`
`316`	`317`	`}`
`317`	`318`	`}`
`318`	`319`	`}`