Merge pull request CRAlpha#225 from indapublic/patch/issue-222/get-vi…

…ew-manager-config

Fixed warning UIManager['CRAWKWebView'] is no longer supported

WKWebView.ios.js

@@ -385,7 +385,7 @@ class WKWebView extends React.Component {
   goForward = () => {
     UIManager.dispatchViewManagerCommand(
       this.getWebViewHandle(),
-      UIManager.CRAWKWebView.Commands.goForward,
+      this.getCRAWKWebView().Commands.goForward,
       null
     );
   };
@@ -396,7 +396,7 @@ class WKWebView extends React.Component {
   goBack = () => {
     UIManager.dispatchViewManagerCommand(
       this.getWebViewHandle(),
-      UIManager.CRAWKWebView.Commands.goBack,
+      this.getCRAWKWebView().Commands.goBack,
       null
     );
   };
@@ -422,7 +422,7 @@ class WKWebView extends React.Component {
     this.setState({ viewState: WebViewState.LOADING });
     UIManager.dispatchViewManagerCommand(
       this.getWebViewHandle(),
-      UIManager.CRAWKWebView.Commands.reload,
+      this.getCRAWKWebView().Commands.reload,
       null
     );
   };
@@ -433,7 +433,7 @@ class WKWebView extends React.Component {
   stopLoading = () => {
     UIManager.dispatchViewManagerCommand(
       this.getWebViewHandle(),
-      UIManager.CRAWKWebView.Commands.stopLoading,
+      this.getCRAWKWebView().Commands.stopLoading,
       null
     )
   };
@@ -451,7 +451,7 @@ class WKWebView extends React.Component {
   postMessage = (data) => {
     UIManager.dispatchViewManagerCommand(
       this.getWebViewHandle(),
-      UIManager.CRAWKWebView.Commands.postMessage,
+      this.getCRAWKWebView().Commands.postMessage,
       [String(data)]
     );
   };
@@ -470,6 +470,14 @@ class WKWebView extends React.Component {
     }
   };
 
+  getCRAWKWebView = () => {
+    return (
+      UIManager.getViewManagerConfig ?
+      UIManager.getViewManagerConfig('CRAWKWebView') :
+      UIManager.CRAWKWebView
+    );
+  };
+
   /**
    * Returns the native webview node.
    */