add comments

Chris Yang · Chris Yang · commit 580b39e5c8f0 · 2020-09-30T14:05:51.000-07:00
diff --git a/shell/platform/darwin/ios/ios_surface.mm b/shell/platform/darwin/ios/ios_surface.mm
@@ -87,6 +87,9 @@
   FML_CHECK(platform_views_controller_ != nullptr);
   platform_views_controller_->SetFrameSize(frame_size);
   if ([[NSThread currentThread] isMainThread]) {
+    // CATransctions can only be added to the main thread, otherwise it introduces
+    // a crash on iOS 14 and above in certain situations including image picker.
+    // See: https://github.com/flutter/flutter/issues/66647
     [CATransaction begin];
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -87,6 +87,9 @@`
`87`	`87`	`FML_CHECK(platform_views_controller_ != nullptr);`
`88`	`88`	`platform_views_controller_->SetFrameSize(frame_size);`
`89`	`89`	`if ([[NSThread currentThread] isMainThread]) {`
	`90`	`+ // CATransctions can only be added to the main thread, otherwise it introduces`
	`91`	`+ // a crash on iOS 14 and above in certain situations including image picker.`
	`92`	`+ // See: https://github.com/flutter/flutter/issues/66647`
`90`	`93`	`[CATransaction begin];`
`91`	`94`	`}`
`92`	`95`	`}`