我是 React 的新手，我正在尝试在无状态子组件中执行条件渲染。当我更新我的状态以强制改变条件时，什么也没有发生。我已经检查以确保我的回调函数实际上正在改变它的状态。我已经确保道具正常工作，因为我能够通过道具从孩子那里检索其他数据。//main app componentthis.state={FileViewable: false} changeViewStatetoTrue = () =>{ this.setState({FileViewable:!this.state.FileViewable}, function (){ console.log(this.state.FileViewable) });//there are more routes but I just wanted to include the route in question <Switch> <Route path="/app" render={props=><Body {...props} changeViewStatetoTrue={this.changeViewStatetoTrue} fileviewableState={this.FileViewable}/>}/> </Switch>//Body component where the conditional rendering should happen, there is a Tesseract OCR API call being made here, i've left it out because it works fine render(props) { var documentView; if(!this.props.fileviewableState){ documentView = <div> view number 1 </div> } else { documentView = <div> <h1>view number 2 </h1> </div> }我没有看到任何错误消息和状态正在更改的控制台日志。我不知道为什么会这样？
2 回答
料青山看我应如是
TA贡献1772条经验 获得超8个赞
可能的错误在这里：
<Switch>
<Route path="/app" render={props=><Body {...props} changeViewStatetoTrue={this.changeViewStatetoTrue} fileviewableState={this.FileViewable}/>}/>
</Switch>
应该：
<Switch>
<Route path="/app" render={props=><Body {...props} changeViewStatetoTrue={this.changeViewStatetoTrue} fileviewableState={this.state.FileViewable}/>}/>
</Switch>
（fileviewableState={this.FileViewable}应该是fileviewableState={this.state.FileViewable}
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