我試圖達成一個嵌套的數組4個對象深,我已經根據我的代碼在這裏下車的例子:http://facebook.github.io/react-native/docs/tutorial.html#content陣營本地嵌套數組
我得到的錯誤是:
不確定是不是一個對象(評價 'Object.keys(dataBlob [sectionID])')
ListViewDataSource.js @ 206:0
cloneWithRowsAndSections ListViewDataSource.js @ 205:0
個cloneWithRows ListViewDataSource.js @ 166:0
index.ios.js @ 40:0
這是JSON的例子我有:
{
"json": {
"data": {
"updated": {
"$t": "04 Nov 2015 2321 GMT"
},
"flux": {
"$t": "111"
},
"aindex": {
"$t": "41"
},
"kindex": {
"$t": "3"
},
"kindexnt": {
"$t": "No Report"
},
"xray": {
"$t": "B6.0"
},
"sunspots": {
"$t": "95"
},
"heliumline": {
"$t": "131.8"
},
"protonflux": {
"$t": "3.14e-01"
},
"electonflux": {
"$t": "5.46e+02"
},
"aurora": {
"$t": "1"
},
"normalization": {
"$t": "1.99"
},
"latdegree": {
"$t": "67.5"
},
"solarwind": {
"$t": "564.3"
},
"magneticfield": {
"$t": "0.2"
},
"calculatedconditions": {
"band": [
{
"name": "80m-40m",
"time": "day",
"$t": "Poor"
},
{
"name": "30m-20m",
"time": "day",
"$t": "Good"
},
{
"name": "17m-15m",
"time": "day",
"$t": "Fair"
},
{
"name": "12m-10m",
"time": "day",
"$t": "Poor"
},
{
"name": "80m-40m",
"time": "night",
"$t": "Fair"
},
{
"name": "30m-20m",
"time": "night",
"$t": "Good"
},
{
"name": "17m-15m",
"time": "night",
"$t": "Fair"
},
{
"name": "12m-10m",
"time": "night",
"$t": "Poor"
}
]
}
}
}
}
使用示例我在我的index.ios.js中有以下內容:
/**
* Sample React Native App
* https://github.com/facebook/react-native
*/
'use strict';
var React = require('react-native');
var {
AppRegistry,
Image,
ListView,
StyleSheet,
Text,
View,
} = React;
var API_URL = 'http://url.com/file.json';
var REQUEST_URL = API_URL;
var HFStatus = React.createClass({
getInitialState: function() {
return {
dataSource: new ListView.DataSource({
rowHasChanged: (row1, row2) => row1 !== row2,
}),
loaded: false,
};
},
componentDidMount: function() {
this.fetchData();
},
fetchData: function() {
fetch(REQUEST_URL)
.then((response) => response.json())
.then((responseData) => {
this.setState({
dataSource: this.state.dataSource.cloneWithRows(responseData.datas),
loaded: true,
});
})
.done();
},
render: function() {
if (!this.state.loaded) {
return this.renderLoadingView();
}
return (
<ListView
dataSource={this.state.dataSource}
renderRow={this.renderdata}
style={styles.listView}
/>
);
},
renderLoadingView: function() {
return (
<View style={styles.container}>
<Text>
Loading datas...
</Text>
</View>
);
},
renderdata: function(data) {
return (
<View style={styles.container}>
<Text style={styles.title}>{data.json.data.calculatedconditions.band.name}</Text>
<Text style={styles.title}>{data.json.data.calculatedconditions.band.time}</Text>
<Text style={styles.title}>{data.json.data.calculatedconditions.band.$t}</Text>
</View>
);
},
});
var styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
rightContainer: {
flex: 1,
},
title: {
fontSize: 20,
marginBottom: 8,
textAlign: 'center',
},
year: {
textAlign: 'center',
},
thumbnail: {
width: 53,
height: 81,
},
listView: {
paddingTop: 20,
backgroundColor: '#F5FCFF',
},
});
AppRegistry.registerComponent('HFStatus',() => HFStatus);
你好Nader Dabit,尼斯答案,但我仍然混淆從陣列中獲取數據並渲染數據,所以請你詳細告訴我的例子?我是新來的。 –
這是什麼(dataSource:this.state.dataSource.cloneWithRows)我有一個API,我想將該名稱呈現到列表視圖請幫助。 –
什麼是(componentDidMount)什麼是(rowHasChanged:(row1,row2)=> row1!== row2,)這我會在每個例子中看到這行,但我不明白爲什麼我們使用? –