我是 React 的新手,浏览了 SO 中的类似问题,但找不到任何问题。这可能是微不足道的,但请耐心等待。
我有嵌套的组件
const IndicatorsSteepCardContainer = React.createClass({
getInitialState () {
return {
steep: {
Social: true,
Tech: true,
Economy: true,
Ecology: true,
Politics: true
},
data: indicatorData
}
}
render () {
let props = this.props;
let state = this.state;
console.log('STATE inside steepcardcontainer >>>>', this.state.data);
// VisualisationContainer to have different data eventually
return (
<div className="indicators">
<h3 className="description-text">Tap on an issue group below to filter indicators available in the data visualisation. Tap it again to return to the full list of indicators.</h3>
<div className='steep container steep-container'>
<SteepCard selected={ this.selectedSteeps } steep="Social" data={ props.data.themeData } class="yellow" title="Social" steepIcon={ SocialIcon } />
<SteepCard selected={ this.selectedSteeps } steep="Tech" data={ props.data.themeData } class="blue" title="Tech" steepIcon={ TechIcon }/>
<SteepCard selected={ this.selectedSteeps } steep="Economy" data={ props.data.themeData } class="pink" title="Economy" steepIcon={ EconomyIcon } />
<SteepCard selected={ this.selectedSteeps } steep="Ecology" data={ props.data.themeData } class="green" title="Ecology" steepIcon={ EcologyIcon } />
<SteepCard selected={ this.selectedSteeps } steep="Politics" data={ props.data.themeData } class="orange" title="Politics" steepIcon={ PoliticsIcon } />
</div>
<VisualisationContainer data={this.state.data}/>
</div>
);
}
});
这是 VisualisationContainer 组件中的渲染方法:
render () {
console.log('props inside visualisation-container>>>', this.props.data);
return (
<div className='visualisation-container'>
<div className="render-button" onTouchTap= { this.d3It.bind(null, this.selectedSteeps) }>
Plot graph
</div>
<div className="update-button" onTouchTap= { this.update.bind(null, this.selectedSteeps) }>
Update
</div>
<div className="indicator-items">
<IndicatorList data={this.props.data} className="indicator-list" />
<SelectedIndicators visible={true} onClick={this.toggleVisibility}/>
</div>
</div>
);
}
该组件内部还有另一个嵌套组件 IndicatorList,这是该组件的代码:
render () {
let props = this.props;
let keys = Object.keys(props.data);
console.log('props inside indicator-list>>>', props.data);
let allIndicators = [];
keys.forEach(function(key){
var indicators = Object.keys(props.data[key]);
allIndicators.push(indicators);
// console.log(allIndicators);
});
let merged = [].concat.apply([], allIndicators);
return (
<div className="indicator-list">
{
merged.map((val, i) => {
return <Indicator className="indicator-name" key={i} value={val} />
})
}
</div>
);
}
最后,该组件返回另一个组件,它只是根据 SteepCardContainer 组件中的数据动态生成的 DIV 元素。
render () {
return (
<div> { this.props.value }</div>
);
}
我正在通过 SteepCardContainer 状态中的 Prop 传递这些组件使用的所有数据。最初,当页面加载时,数据被向下传递,并且 state.data 中的所有内容都用作指示器组件中的项目,指示器组件是层次结构中的最后一个嵌套组件。所以,我的问题是在状态更改时, Prop 不会从 steepcardcontainer 组件更新。即状态发生变化,我可以看到,但是 Prop 没有更新 - 特别是 VisualisatioContainer 没有更新其 Prop ,即使状态发生了变化。这就是我遇到的问题。很感谢任何形式的帮助。
最佳答案
我要做的第一件事是。
render () {
let propsdThemeData = this.props.data.themeData;
let stateData = this.state.data;
console.log('STATE inside steepcardcontainer >>>>', this.state.data);
// VisualisationContainer to have different data eventually
return (
<div className="indicators">
<h3 className="description-text">Tap on an issue group below to filter indicators available in the data visualisation. Tap it again to return to the full list of indicators.</h3>
<div className='steep container steep-container'>
<SteepCard selected={ this.selectedSteeps } steep="Social" data={ propsdThemeData } class="yellow" title="Social" steepIcon={ SocialIcon } />
<SteepCard selected={ this.selectedSteeps } steep="Tech" data={ propsdThemeData } class="blue" title="Tech" steepIcon={ TechIcon }/>
<SteepCard selected={ this.selectedSteeps } steep="Economy" data={ propsdThemeData } class="pink" title="Economy" steepIcon={ EconomyIcon } />
<SteepCard selected={ this.selectedSteeps } steep="Ecology" data={ propsdThemeData } class="green" title="Ecology" steepIcon={ EcologyIcon } />
<SteepCard selected={ this.selectedSteeps } steep="Politics" data={ propsdThemeData } class="orange" title="Politics" steepIcon={ PoliticsIcon } />
</div>
<VisualisationContainer data={stateData}/>
</div>
);
}
关于javascript - React 子组件不会在父状态更改时重新渲染,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33831817/