从材料 ui 处理自动完成组件的更改

Question

我想使用 Autocomplete 组件作为输入标签。我正在尝试获取标签并将它们保存在一个状态中，以便以后可以将它们保存在数据库中。我在反应中使用函数而不是类。我确实尝试过 onChange ，但没有得到任何结果。

 <div style={{ width: 500 }}>
  <Autocomplete
    multiple
    options={autoComplete}
    filterSelectedOptions
    getOptionLabel={(option) => option.tags}
    renderInput={(params) => (
      <TextField
        className={classes.input}
        {...params}
        variant="outlined"
        placeholder="Favorites"
        margin="normal"
        fullWidth
      />
    )}
  />
</div>;

原文由 Buk Lau 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

正如 Yuki 已经提到的，确保您确实使用了 onChange 功能。它接收两个参数。根据文档：

签名： function(event: object, value: any) => void 。

event : 回调的事件源

value ：null（自动完成组件中的值）。

这是一个例子：

 import React from 'react';
import Chip from '@material-ui/core/Chip';
import Autocomplete from '@material-ui/lab/Autocomplete';
import TextField from '@material-ui/core/TextField';

export default class Tags extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      tags: []
    };
    this.onTagsChange = this.onTagsChange.bind(this);
  }

  onTagsChange = (event, values) => {
    this.setState({
      tags: values
    }, () => {
      // This will output an array of objects
      // given by Autocompelte options property.
      console.log(this.state.tags);
    });
  }

  render() {
    return (
      <div style={{ width: 500 }}>
        <Autocomplete
          multiple
          options={top100Films}
          getOptionLabel={option => option.title}
          defaultValue={[top100Films[13]]}
          onChange={this.onTagsChange}
          renderInput={params => (
            <TextField
              {...params}
              variant="standard"
              label="Multiple values"
              placeholder="Favorites"
              margin="normal"
              fullWidth
            />
          )}
        />
      </div>
    );
  }
}

const top100Films = [
  { title: 'The Shawshank Redemption', year: 1994 },
  { title: 'The Godfather', year: 1972 },
  { title: 'The Godfather: Part II', year: 1974 },
  { title: 'The Dark Knight', year: 2008 },
  { title: '12 Angry Men', year: 1957 },
  { title: "Schindler's List", year: 1993 },
  { title: 'Pulp Fiction', year: 1994 },
  { title: 'The Lord of the Rings: The Return of the King', year: 2003 },
  { title: 'The Good, the Bad and the Ugly', year: 1966 },
  { title: 'Fight Club', year: 1999 },
  { title: 'The Lord of the Rings: The Fellowship of the Ring', year: 2001 },
  { title: 'Star Wars: Episode V - The Empire Strikes Back', year: 1980 },
  { title: 'Forrest Gump', year: 1994 },
  { title: 'Inception', year: 2010 },
];

原文由 germmand 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

我需要在每次输入更改时点击我的 api 以从后端获取我的标签！

如果您想在每次输入更改时获得建议的标签，请使用 Material-ui onInputChange！

 this.state = {
  // labels are temp, will change every time on auto complete
  labels: [],
  // these are the ones which will be send with content
  selectedTags: [],
}
}

//to get the value on every input change
onInputChange(event,value){
console.log(value)
//response from api
.then((res) => {
      this.setState({
        labels: res
      })
    })

}

//to select input tags
onSelectTag(e, value) {
this.setState({
  selectedTags: value
})
}

            <Autocomplete
            multiple
            options={top100Films}
            getOptionLabel={option => option.title}
            onChange={this.onSelectTag} // click on the show tags
            onInputChange={this.onInputChange} //** on every input change hitting my api**
            filterSelectedOptions
            renderInput={(params) => (
              <TextField
                {...params}
                variant="standard"
                label="Multiple values"
                placeholder="Favorites"
                margin="normal"
                fullWidth
              />

原文由 oyemujtaba 发布，翻译遵循 CC BY-SA 4.0 许可协议