iOS11 WKWebView Crashfix (#280)

Author: dasMajo

src/ios/CodePushReportingManager.m

@@ -35,7 +35,11 @@ + (void)reportStatus:(StatusReport*)statusReport withWebView:(UIView*)webView {
         /* JS function to call: window.codePush.reportStatus(status: number, label: String, appVersion: String, deploymentKey: String) */
         NSString* script = [NSString stringWithFormat:@"document.addEventListener(\"deviceready\", function () { window.codePush.reportStatus(%i, %@, %@, %@, %@, %@); });", (int)statusReport.status, labelParameter, appVersionParameter, deploymentKeyParameter, lastVersionLabelOrAppVersionParameter, lastVersionDeploymentKeyParameter];
         if ([webView respondsToSelector:@selector(evaluateJavaScript:completionHandler:)]) {
-            [webView performSelector:@selector(evaluateJavaScript:completionHandler:) withObject:script withObject: NULL];
+            // The WKWebView requires JS evaluation to occur on the main
+            // thread starting with iOS11, so ensure that we dispatch to it before executing.
+            dispatch_async(dispatch_get_main_queue(), ^{
+                [webView performSelector:@selector(evaluateJavaScript:completionHandler:) withObject:script withObject: NULL];
+            });
         } else if ([webView isKindOfClass:[UIWebView class]]) {
             // The UIWebView requires JS evaluation to occur on the main
             // thread, so ensure that we dispatch to it before executing.