Question

我需要能够从我注册的屏幕组件中获取当前导航状态。我希望在routes对象中找到一个navigation.state对象但是它不在那里。我已经设法通过以下方式设置我的根组件来实现这一点，但是这看起来很复杂，我不能帮助，但认为必须有一种更清洁的方法来实现这一点。

App.js

import React, {Component} from 'react'
import {Tabs} from './components/Routes'
import {NavigationActions} from 'react-navigation'


export default class App extends React.Component {

    state = {
        navState: null
    }

    componentDidMount(){
        const initState = Tabs.router.getStateForAction(NavigationActions.init())
        this.getState(null, initState);
    }

    getState = (prevState, newState) => {
        let activeIndex = newState.index
        let navState = newState.routes[activeIndex]
        this.setState({navState})
    }

  render() {

    return (
        <Tabs
            onNavigationStateChange={this.getState}
            screenProps={{navState: this.state.navState}}/>
    )

  }

}

Answer 1

<NavigationName
    onNavigationStateChange={(prevState, newState) => {
        this._getCurrentRouteName(newState)
    }}
/>

_getCurrentRouteName(navState) {

    if (navState.hasOwnProperty('index')) {
        this._getCurrentRouteName(navState.routes[navState.index])
    } else {
        console.log("Current Route Name:", navState.routeName)
        this.setState({navState: setCurrentRouteName(navState.routeName)})
    }
}

反应导航在屏幕中获取当前导航状态

1 个答案: