Bind ExRouteAdapter instance to render callbacks

ExRouter.js

@@ -37,13 +37,13 @@ export class ExRouteAdapter {
         this.props = props || {};
         this.renderScene = this.renderScene.bind(this);
         if (this.route.props.renderRightButton){
-            this.renderRightButton = this.route.props.renderRightButton.bind(this.route);
+            this.renderRightButton = this.route.props.renderRightButton.bind(this);
         }
         if (this.route.props.renderTitle){
-            this.renderTitle = this.route.props.renderTitle.bind(this.route);
+            this.renderTitle = this.route.props.renderTitle.bind(null, this.route);
         }
         if (this.route.props.renderLeftButton){
-            this.renderLeftButton = this.route.props.renderLeftButton.bind(this.route);
+            this.renderLeftButton = this.route.props.renderLeftButton.bind(this);
         }
     }
 
@@ -104,7 +104,7 @@ export class ExRouteAdapter {
                   style={[ExNavigator.Styles.barLeftButtonText, this.route.props.leftButtonTextStyle]}>{this.route.props.leftTitle}</Text>
             </TouchableOpacity>);
         }
-        
+
         if (index === 0 || index < navigator.getCurrentRoutes().length-1) {
             return null;
         }