React-Native - Custom navigation with Navigator co

问题:

I'm exploring possibilities of React Native while developing a demo app with custom navigation between views with the help of Navigator component - http://facebook.github.io/react-native/docs/navigator.html#content

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 2 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 logs that when pressing "go to feed" renderScene is 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 View
  

• Generally does my approach conforms the React way, or it can be done better?

What I want to achieve is something similar to NavigatorIOS but without navigation bar (however some views will have their own custom navigation bar).

回答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)

回答2:

Navigator is deprecated now in RN 0.44.0 you can use react-native-deprecated-custom-components instead to support your existing application that is using Navigator.

回答3:

Navigator component is deprecated now. You could use react-native-router-flux by askonov, it has a huge variety and supports many different animations and is efficient

回答4:

As others have previously mentioned, Navigator has been deprecated since v0.44, but can still be imported to support older applications:

Navigator has been removed from the core React Native package in version 0.44. The module has been moved to a react-native-custom-components package that can be imported by your application in order to maintain backwards compatibility.

To see the original docs for Navigator, please switch to an older version of the docs.

As per the docs (React Native v0.54) Navigating Between Screens. It is now recommended to use React Navigation if you are just getting started, or NavigatorIOS for non-Android applications

If you are just getting started with navigation, you will probably want to use React Navigation. React Navigation provides an easy to use navigation solution, with the ability to present common stack navigation and tabbed navigation patterns on both iOS and Android.

...

If you're only targeting iOS, you may want to also check out NavigatorIOS as a way of providing a native look and feel with minimal configuration, as it provides a wrapper around the native UINavigationController class.

NB: At the time of providing this answer, React Native was at version 0.54