[英]Picker does not render with-in react-native-elements
我正在嘗試將Picker元素(這樣我可以有一個下拉菜單)添加到Header組件(標題是從react-native-elements庫導入的),但是我看不到它,也看不到任何錯誤,任何幫助,將不勝感激。
我已經成功添加了一個矢量圖標,所以我知道標題組件正在按預期工作,但仍在文檔中看不到它。
import React from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View,
Picker,
ListView
} from 'react-native';
import CoinCell from './js/Components/CoinCell/CoinCell';
import { Header } from 'react-native-elements';
import { getCryptocurrencyData } from './js/NetworkHandler'
export default class CoinCheckerRN extends React.Component {
constructor(props) {
super(props);
const dataSource = new ListView.DataSource({rowHasChanged: (row1, row2) => row1 !== row2});
this.state = {
dataSource: dataSource.cloneWithRows([]),
};
this._renderRow = this._renderRow.bind(this);
this._getCoinData = this._getCoinData.bind(this);
this._renderPicker = this._renderPicker.bind(this);
}
componentWillMount() {
this._getCoinData();
}
_getCoinData() {
getCryptocurrencyData().then(function(result) {
const ds = new ListView.DataSource({rowHasChanged: (row1, row2) => row1 !== row2});
this.setState({
dataSource: ds.cloneWithRows(result),
jsonData: result
});
}.bind(this))
}
_renderRow(data) {
return (
<CoinCell coinName={data.name} coinPrice={data.price_gbp} coinPercentageChange={data.percent_change_24h}></CoinCell> )
}
_renderPicker() {
return (<Picker
selectedValue={'test'}
onValueChange={(itemValue, itemIndex) => this.setState({language: itemValue})}>
<Picker.Item label="Java" value="java" />
</Picker>)
}
_renderHeader() {
return (
<Header
leftComponent={<Picker
selectedValue={this.state.language}
onValueChange={(itemValue, itemIndex) => this.setState({language: itemValue})}>
<Picker.Item label="Wallet" value="key0" />
</Picker>}
rightComponent={{ icon: 'refresh', color: '#FFF' }}
innerContainerStyles={{ backgroundColor: '#03A9F4'}}
outerContainerStyles={{ backgroundColor: '#03A9F4'}}
/>)
}
render() {
return (
<View>
{this._renderHeader()}
<ListView
enableEmptySections
ref={'resultListView'}
dataSource={this.state.dataSource}
renderRow={this._renderRow}
style={{paddingTop: 64}}
renderSeparator={(sectionId, rowId) => <View key={rowId} style={styles.separator} />}
/>
</View>
);
}
}
我之前遇到過一個非常類似的問題,並定義了拾取器的高度/寬度來修復它。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.