2017-03-22 81 views
0

在自學React-Native的過程中。構建一個零售iOS網站的模型,該網站從Firebase獲取數據,並試圖將Navigator納入其中。我的應用程序從'index.ios.js> MainLayout>路由> HomeIndex'流動。這裏據說組件:React-Native - Navigator not rendering initialRoute

MainLayout.js

import React, { Component } from 'react'; 
import { Text } from 'react-native'; 
import { Container, Header, Title, Content, Footer, FooterTab, Button, Left, Right, Body, Icon } from 'native-base'; 
import Routing from './Routing'; 
import HomeIndex from '../pages/HomeIndex'; 

class MainLayout extends Component { 
    render() { 
    return (
     <Container> 
     <Header> 
      <Left> 
       <Button transparent> 
       </Button> 
      </Left> 
      <Body> 
       <Title>RetailSite</Title> 
      </Body> 
      <Right /> 
     </Header> 

     <Content> 
      <Routing /> 
     </Content> 

     <Footer> 
      <FooterTab> 
       <Button full> 
        <Text>Footer</Text> 
       </Button> 
      </FooterTab> 
     </Footer> 
     </Container> 
    ); 
    } 
} 

export default MainLayout; 

Routing.js

import React, { Component } from 'react'; 
import { Navigator, View } from 'react-native'; 
import HomeIndex from '../pages/HomeIndex'; 
import ShowPage from '../pages/ShowPage'; 

class Routing extends Component { 

    renderScene(route, navigator) { 
    if (route.name === 'home') { 
     return <HomeIndex navigator={navigator} /> 
    } else if (route.name === 'show') { 
     return <ShowPage navigator={navigator} /> 
    } 
    } 

    render() { 
    return (
     <Navigator 
     initialRoute={{ name: 'home' }} 
     renderScene={this.renderScene.bind(this)} 
     /> 
    ); 
    } 
} 

export default Routing; 

HomeIndex.js

import React, { Component } from 'react'; 
import { RNRSData } from '../../config/FirebaseConstants'; 
import { StyleSheet, Text, View, TouchableHighlight, Image, Navigator } from 'react-native'; 
import styles from '../../../styles.js'; 

class HomeIndex extends Component { 
    constructor(props){ 
    super(props); 
    this.state = { 
     allProducts: [], 
    } 
    } 

    componentDidMount() { 
    let _this = this; 
    let products = {}; 

    RNRSData.ref('products/').once('value', function(data) { 
     data.forEach(function(productNode) { 
     let name = productNode.val().name; 
     let cost = productNode.val().cost; 
     let image = productNode.val().image; 
     let idNumber = productNode.key; 
     products[name] = {name: name, cost: cost, image: image, id: idNumber} 
     }) 
    }).then(function(product) { 
     console.log(product) 
     let keys = Object.keys(products).sort(); 
     let sortedHash = {}; 
     let sortedArray = []; 

     for (let i = 0; i < keys.length; i++) { 
     let key = keys[i]; 
     sortedArray.push(sortedHash[key] = products[key]); 
     } 

     _this.setState({allProducts: sortedArray}, function afterProductSet() { 

     }); 
    }) 
    } 

    render() { 
    let allProducts = this.state.allProducts; 
    console.log(allProducts); 

    return (
     <View> 
     <Text style={styles.homeHeader}>New Arrivals</Text> 
     <View style={styles.homeIndexContainer}> 
      {allProducts.map(function(object) { 
       return (
       <View style={styles.liContainer} key={object.id}> 
        <Image source={{uri: object.image}} style={styles.liImage}> 
        <Text style={styles.liTextName}>{object.name}</Text> 
        <Text style={styles.liTextCost}>${object.cost}</Text> 
        </Image> 
       </View> 
      ) 
      })} 
     </View> 
     </View> 
    ) 
    } 
} 

export default HomeIndex; 

既然這樣,我的模擬器呈現頁眉和頁腳並在HomeIndex中點擊console.log並在所述console.log中顯示正確的數據。但它並沒有顯示它在我的模擬器中從Firebase提取的數據。

如果我在MainLayout.js中將<Routing />換爲<HomeIndex />,它會正確地在模擬器中顯示索引,這導致我懷疑它可能是我在Routing.js中處理的東西。或者,如果導航器以某種方式拋出我的componentDidMount方法。任何幫助,將不勝感激。

+0

所以它的工作,但它沒有顯示。我認爲你可能需要將你的導航器圍繞一個視圖用flex:1. –

+0

@MattAft是啊我已經嘗試在View中包裝導航器,並且在Views中我的renderScene條件下包含HomeIndex和ShowPage。這兩種方法似乎都沒有什麼好處。 – mcw

回答

0

我的問題源自我的MainLayout.js中<Content>標記中的<Routing />組件的嵌套。刪除這些,並正確渲染。