I’m exploring possibilities of React Native while developing a demo app with custom navigation between views with the help of Navigator component.
The main app class renders navigator and inside renderScene returns passed component:
class App extends React.Component {
render() {
return (
<Navigator
initialRoute={{name: 'WelcomeView', component: WelcomeView}}
configureScene={() => {
return Navigator.SceneConfigs.FloatFromRight;
}}
renderScene={(route, navigator) => {
// count the number of func calls
console.log(route, navigator);
if (route.component) {
return React.createElement(route.component, { navigator });
}
}}
/>
);
}
}
For now app contains two views:
class FeedView extends React.Component {
render() {
return (
<View style={styles.container}>
<Text>
Feed View!
</Text>
</View>
);
}
}
class WelcomeView extends React.Component {
onPressFeed() {
this.props.navigator.push({
name: 'FeedView',
component: FeedView
});
}
render() {
return (
<View style={styles.container}>
<Text style={styles.welcome}>
Welcome View!
</Text>
<Text onPress={this.onPressFeed.bind(this)}>
Go to feed!
</Text>
</View>
);
}
}
What I want to figure out is:
I see in the logs that when pressing “go to feed”
renderSceneis called several times though the view renders correctly once. Is it how the animation works?index.ios.js:57 Object {name: 'WelcomeView', component: function} index.ios.js:57 Object {name: 'FeedView', component: function} // renders Feed ViewGenerally does my approach conform to the React way, or can it be done better?
What I want to achieve is something similar to NavigatorIOS but without the navigation bar (however some views will have their own custom navigation bar).
ベストアンサー1
Your approach should work great. In big apps at Fb, we avoid calling the require() for the scene component until we render it, which can save a bit of start-up time.
The renderScene function should be called when the scene is first pushed to the Navigator. It will also be called for the active scene when the Navigator gets re-rendered. If you see renderScene get called multiple times after a push, then it is probably a bug.
The navigator is still a work in progress, but if you find any problems with it please file on github and tag me! (@ericvicenti)