Merge pull request #37 from sethx/patch-9

Update README.md

Author: MikaelCarpenter

README.md

@@ -89,6 +89,7 @@ The **`<Router \>`** object used to initialize the navigation can take the follo
 - `backButtonComponent`: By default, the navigation bar will display a simple "Back" text for the back button. To change this, you can specify your own backButton component (like in the Twitter app).
 - `rightCorner`: If you have the same occuring action buttons on the right side of your navigation bar (like the Twitter "Compose"-button), you can specify a component for that view.
 - `customAction`: A special callback prop for your action buttons (this can be handy for triggering a side menu for example). The action gets triggered from your custom `leftCorner` or `rightCorner` components by calling `this.props.customAction("someActionName")` from them. It is then picked up like this: `<Router customAction={this.doSomething} />`.
+- `hideNavigationBar`: Hide the navigation bar, always
 
 The **`this.props.toRoute()`** callback prop takes one parameter (a JavaScript object) which can have the following keys:
 - `name`: The name of your route, which will be shown as the title of the navigation bar unless it is changed.
@@ -98,7 +99,8 @@ The **`this.props.toRoute()`** callback prop takes one parameter (a JavaScript o
 - `titleComponent`: Specify a component to replace the title. This could for example be your logo (as in the first page of the Instagram app)
 - `headerStyle`: Change the style of your header for the new route. You could for example specify a new backgroundColor and the router will automatically make a nice transition from one color to the other!
 - `passProps`: Takes in an object. Passes each `key: value` pair to your component as a prop. i.e. <Component key={value} />
-- `trans`: If you set trans to `true` it will make the navbar transparent and move your component content so that it sits behind the nav.
+- `trans`: If set to a truthy value it will make the navbar transparent and move your component content so that it sits behind the nav.
+- `hideNavigationBar`: If set to a truthy value will hide the navigationbar out of view, and move the component so that it is at the top of the screen.
 - `leftCornerProps`: If you set a `leftCorner` component you can use this property to pass props to that component.
 - `rightCornerProps`: If you set a `rightCorner` component you can use this property to pass props to that component.
 - `sceneConfig`: Control the animation of the route being switched. Possible values are:
@@ -124,6 +126,18 @@ The **`this.props.setRightProps`** and **`this.props.setLeftProps`** take in an
 - This allows you to talk directly to your navbar, because previously you could only talk to it when navigating forward or backward.
 
 
+Events emitted by the router:
+  `didFocus`, emits route name
+  You can add a listener to a component as such:
+
+```javascript
+  	this.props.routeEmitter.addListener('didFocus', (name) => {
+			//Check if name is the current component, and if it is, act on this focus event.
+		});
+```
+
+
+
 A more advanced example: Twitter app
 ------------------------------------