reactjs - React - 基于计数的动态输入字段

Question

我想根据用户输入的计数创建文本字段。我查了很多相关问题，但找不到我想要的结果。

例如:如果用户输入 5 作为输入。我想创建 5 个文本框来输入 5 个人的姓名和手机。

我怎样才能实现这个目标？

获取计数的文本字段

  <GridItem xs={12} sm={12} md={12}>
                      <TextField
                        id="sp_Inhouse"
                        label="Number of Pilots Available "
                        type="number"
                        fullWidth
                        className={classes.textField}
                        value={this.state.sp_Inhousecount}
                        error={!!this.state.sp_InhouseError}
                        helperText={this.state.sp_InhouseError}
                        onChange={this.handleChangeInhouse}
                        margin="normal"
                        required
                      />
                    </GridItem>

尝试添加基于按钮单击的文本框。效果很好。但我想要结果如所解释的那样。

                    <GridItem xs={12} sm={12} md={12}>
                       <Button color="primary" onClick={this.handleCreatePilots}>
                      <AddIcon />  Add Pilots
                      </Button>
                      {this.state.inhouse.map((index) => {
                        return (
                          <div key={index}>
                          <TextField
                            id="sp_Name"

                            label="Name "
                            type="number"
                            fullWidth
                          />
 <TextField
                            id="sp_Mobile"

                            label="Name "
                            type="number"
                            fullWidth
                          />
                          </div>
                        )
                      })
                      }
                    </GridItem>

 handleCreatePilots=()=>{
    this.setState({
      inhouse:[...this.state.inhouse,'']
    })
  }

Answer 1

循环访问用户输入的数字。

const inputs = [];

for (let i = 1; i <= this.state.total; i++) {
  inputs.push(
    <input name={`input-${i}`} onChange={this.onChange} />
  )
}

渲染输入

render() {
  return (
   ....
    {inputs}
  ...
  )
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.0/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.0/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.21.1/babel.min.js"></script>
<div id="root"></div>

<script type="text/babel">

class App extends React.Component {
  constructor() {
    super();
    this.state = {
      name: 'React',
      total: 0,
      totalInput: '',
      show: false,
    };
  }

  add = () => {
    this.setState({
      total: this.state.totalInput
    })
  }

  showValues = () => {
    this.setState({
      show: true
    })
  }

  onChange = (event) => {
    this.setState({
      [event.target.name]: event.target.value
    })
  }

  render() {

    const inputs = [];

    for (let i = 1; i <= this.state.total; i++) {
      inputs.push(
        <input name={`input-${i}`} onChange={this.onChange} />
      )
    }
    return (
      <div>
        <input onChange={(e) => this.setState({ totalInput: e.target.value})} value={this.state.totalInput}  placeholder="Enter Number" />
        <button onClick={this.add}>Add</button>
        <br />
        {inputs}
         <br />
        <button onClick={this.showValues}>Show Inputs values</button>
        { this.state.show && 
          <pre>{JSON.stringify(this.state, null, 4)}</pre>
        }
      </div>
    );
  }
}

ReactDOM.render(<App />, document.getElementById('root'));
</script>