Question

我在Material UI的对话框表单中有一个简单的选择字段。表单使用状态将值保存为onChange状态。我的状态代码如下：

    const [planner, setPlanner] = useState({
  name: '',
  title: '1',
 
});

const { title, name } = planner;
const onChange = (e) => {
  setPlanner({ ...planner, [e.target.id]: e.target.value });

我的表单代码如下：

<Dialog
      open={open}
      onClose={handleClose}
      aria-labelledby='form-dialog-title'
    >
      <DialogTitle id='form-dialog-title'>Add New Planner</DialogTitle>
      <DialogContent>
        <DialogContentText>
          some text
        </DialogContentText>
        <FormControl className={classes.formControl}>
          <InputLabel id='title-label'>Title</InputLabel>
          <Select labelId='title' id='title' value={title} onChange={onChange}>
            <MenuItem value={10}>Mr</MenuItem>
            <MenuItem value={20}>Mrs</MenuItem>
          </Select>
        </FormControl>

        <TextField
          margin='dense'
          id='name'
          label='Name'
          type='text'
          value={name}
          onChange={onChange}
          fullWidth
          autoComplete='name'
        />
      </DialogContent>
      <DialogActions>
        <Button onClick={handleClose} color='primary'>
          Cancel
        </Button>
        <Button onClick={onSubmit} color='primary'>
          Add Planner
        </Button>
      </DialogActions>
    </Dialog>

谢谢您的帮助！完整的页面代码如下：它使用redux状态管理器和useEffect，useState Hooks。除此之外，表格非常简单，除了“标题”下拉菜单之外，其他所有内容都可以正常运行。

import React, { useState, useEffect } from 'react';
import TextField from '@material-ui/core/TextField';
import Dialog from '@material-ui/core/Dialog';
import DialogActions from '@material-ui/core/DialogActions';
import DialogContent from '@material-ui/core/DialogContent';
import DialogContentText from '@material-ui/core/DialogContentText';
import DialogTitle from '@material-ui/core/DialogTitle';
import Button from '@material-ui/core/Button';
import { makeStyles } from '@material-ui/core/styles';
import {
  addPlanner,
  clearErrors,
  clearAdd,
} from '../../actions/plannerActions';
import { setAlert } from '../../actions/alertActions';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
import Select from '@material-ui/core/Select';
import MenuItem from '@material-ui/core/MenuItem';
import InputLabel from '@material-ui/core/InputLabel';
import FormControl from '@material-ui/core/FormControl';

const useStyles = makeStyles((theme) => ({
  root: {
    '& > *': {
      margin: theme.spacing(2),
    },
  },
  text: {
    textAlign: 'center',
  },
  appBarSpacer: theme.mixins.toolbar,
  content: {
    flexGrow: 1,
    overflow: 'auto',
  },
  container: {
    paddingTop: theme.spacing(10),
    paddingBottom: theme.spacing(20),
  },
  textfield: {
    width: '100%',
    border: 0,
  },
  formControl: {
    minWidth: 120,
  },
}));
const PlannerForm = ({
  addPlanner,
  error,
  clearErrors,
  setAlert,
  open,
  handleClose,
  add,
}) => {
  // const [open, setOpen] = React.useState(false);
  const classes = useStyles();
  const [planner, setPlanner] = useState({
    name: '',
    email: '',
    title: '',
    company: '',
    phone: '',
    comments: '',
    password: '123123',
  });

  const { title, name, email, company, phone, comments } = planner;
  const onChange = (e) => {
    setPlanner({ ...planner, [e.target.id]: e.target.value });
  };
  const clearForm = () => {
    setPlanner({
      name: '',
      email: '',
      title: '',
      company: '',
      phone: '',
      comments: '',
      password: '123123',
    });
    clearAdd();
  };

  React.useEffect(() => {
    if (error) {
      setAlert(error.errors[0].msg, 'error');
    } else if (add) {
      setAlert('Planner Added', 'success');
      clearForm();
    }
  }, [error, add]);

  const onSubmit = async (e) => {
    e.preventDefault();

    addPlanner(planner);
  };

  return (
    <Dialog
      open={open}
      onClose={handleClose}
      aria-labelledby='form-dialog-title'
    >
      <DialogTitle id='form-dialog-title'>Add New Planner</DialogTitle>
      <DialogContent>
        <DialogContentText>
          To add a new planner insert their info and they will receive an email
          to activate their account, set a new password and login.
        </DialogContentText>
        <FormControl className={classes.formControl}>
          <InputLabel id='title-label'>Title</InputLabel>
          <Select labelId='title' id='title' value={title} onChange={onChange}>
            <MenuItem value={10}>Mr</MenuItem>
            <MenuItem value={20}>Mrs</MenuItem>
          </Select>
        </FormControl>

        <TextField
          margin='dense'
          id='name'
          label='Name'
          type='text'
          value={name}
          onChange={onChange}
          fullWidth
          autoComplete='name'
        />

        <TextField
          margin='dense'
          id='company'
          label='Company'
          type='text'
          value={company}
          onChange={onChange}
          fullWidth
          autoComplete='company'
        />
        <TextField
          margin='dense'
          id='email'
          label='Email Address'
          type='email'
          value={email}
          onChange={onChange}
          fullWidth
          autoComplete='email'
        />
        <TextField
          margin='dense'
          id='phone'
          label='Phone Number'
          type='tel'
          value={phone}
          onChange={onChange}
          fullWidth
          autoComplete='tel'
        />
        <TextField
          placeholder='Additional Comments'
          multiline
          rows={4}
          margin='dense'
          id='comments'
          value={comments}
          onChange={onChange}
          fullWidth
        />
      </DialogContent>
      <DialogActions>
        <Button onClick={handleClose} color='primary'>
          Cancel
        </Button>
        <Button onClick={onSubmit} color='primary'>
          Add Planner
        </Button>
      </DialogActions>
    </Dialog>
  );
};

PlannerForm.propTypes = {
  addPlanner: PropTypes.func.isRequired,
  error: PropTypes.object,
  setAlert: PropTypes.func.isRequired,
  clearErrors: PropTypes.func.isRequired,
  open: PropTypes.bool.isRequired,
  handleClose: PropTypes.func.isRequired,
  add: PropTypes.bool.isRequired,
};

const mapStateToProps = (state) => ({
  isAuthenticated: state.planners.isAuthenticated,
  error: state.planners.error,
  add: state.planners.add,
});

export default connect(mapStateToProps, {
  addPlanner,
  clearErrors,
  setAlert,
})(PlannerForm);

Answer 1

请参见docs

包装器元素或本地选择元素时的ID。

该ID应用于包装div，而不应用于select。要使其正常工作，请对native使用Select属性并将其设置为true。

Working demo

代码段

export default function FormDialog() {
  const [planner, setPlanner] = useState({
    name: "",
    title: "10"
  });

  const { title, name } = planner;
  const onChange = (e, b) => {
    const target = e.target;
    setPlanner(prev => ({ ...prev, [target.id]: target.value }));
  };
  return (
    <div>
      <Dialog
        open={true}
        // onClose={handleClose}
        aria-labelledby="form-dialog-title"
      >
        <DialogTitle id="form-dialog-title">Add New Planner</DialogTitle>
        <DialogContent>
          <DialogContentText>some text</DialogContentText>
          <FormControl>
            <InputLabel id="title-label">Title</InputLabel>
            <Select
              native
              labelId="title"
              id="title"
              value={title}
              onChange={onChange}
            >
              <option value={10}>Mr</option>
              <option value={20}>Mrs</option>
            </Select>
          </FormControl>

          <TextField
            margin="dense"
            id="name"
            label="Name"
            type="text"
            value={name}
            onChange={onChange}
            fullWidth
            autoComplete="name"
          />
        </DialogContent>
        <DialogActions>
          <Button color="primary">Cancel</Button>
          <Button color="primary">Add Planner</Button>
        </DialogActions>
      </Dialog>
    </div>
  );
}

Answer 2

我通过在func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) { print(cell.frame.size.height, self.tableViewHeight) self.tableViewHeight += cell.frame.size.height tableViewBillsHeight.constant = self.tableViewHeight }上添加名称道具来解决此问题。由于某种原因，event.target.id无法正常工作（可能与其他包装组件冲突）

这里是working code

本机用户界面简单选择不保存选择

2 个答案: