navigatior传递

今早在写代码时报错：

message: Cannot read property 'push' of undefined

通过翻看react native文档，发现这么一段话：

A navigator is an object of navigation functions that a view can call. It is passed as a prop to any component rendered by NavigatorIOS.

原来iOS的navigator默认传递navigator对象到props参数里了。如果不是通过navigator渲染的页面，需要自己手动写

navigator={this.props.navigator}

比如通过tab进入的页面很容易忘记传navigator：

<ScrollableTabView edgeHitWidth={deviceWidth / 2}>
  <Summary tabLabel="概况"  siteId={this.props.siteId} />
  <Zones tabLabel="区域" siteId={this.props.siteId} onZoneSelected={this._onZoneSelected} />
  <Search tabLabel="搜索" siteId={this.props.siteId} navigator={this.props.navigator} />
</ScrollableTabView>

http://facebook.github.io/react-native/docs/navigatorios.html#navigator