Added goback and goforward methods

Author: maciej-rosiek

AQWebView.ios.js

@@ -5,9 +5,27 @@ var {
 } = React;
 
 class WKWebView extends React.Component {
+
+  goBack() {
+    this.refs.AQWebView.goBack();	  
+  }
+
+  goForward() {
+    this.refs.AQWebView.goForward();
+  }
+
+  canGoForward() {
+    this.refs.AQWebView.canGoForward();
+  }
+
+  canGoBack() {
+    this.refs.AQWebView.canGoBack();
+  }
+
   render() {
-    return <AQWebView {...this.props} />;
+    return <AQWebView ref="AQWebView" {...this.props} />;
   }
+
 }
 
 WKWebView.propTypes = {

AQWebView/AQWebView.h

@@ -8,5 +8,9 @@
 @property (nonatomic, copy) NSArray<NSString*> *blockedPrefixes;
 
 - (void)reload;
+- (void)goBack;
+- (void)goForward;
+- (BOOL)canGoBack;
+- (BOOL)canGoForward;
 
 @end

AQWebView/AQWebView.m

@@ -72,6 +72,26 @@ - (void)reload
   [_webView loadRequest:[NSURLRequest requestWithURL:_webView.URL]];
 }
 
+- (void)goBack
+{
+    [_webView goBack];
+}
+
+- (void)goForward
+{
+    [_webView goForward];
+}
+
+- (BOOL)canGoBack
+{
+    return [_webView canGoBack];
+}
+
+- (BOOL)canGoForward
+{
+    return [_webView canGoForward];
+}
+
 - (void)setSource:(NSDictionary *)source
 {
   if (![_source isEqualToDictionary:source]) {