奇怪的无限循环与 useEffect 和 useCallback

Question

那好吧。我有这段代码，只是为了练习，所以它可能有点乱（请忽略 cammelCase 约定或不良做法，除非它们是问题的原因，因为我已经注意到了），但是我要描述它的作用，我将展示代码。

我有这个组件，第一次渲染时没有数据，然后当用户单击一个按钮（在父组件中）时，API 它被调用（也在父组件中）并发送响应通过道具到这个有问题的组件。在收到来自 API 的数据后 (props.rows)，执行 useEffect 以格式化此数据并将其存储在状态 (Rows) 中。当 Rows 值更改时，应执行另一个 useEffect 并操作 Rows（不改变它）以创建另一种数据（TotalPages）。问题是，当我调用 setTotalPages() 时，这会产生一个无限循环，并且出现错误 Uncaught Error: Too many re-renders。 React 限制渲染次数以防止无限循环。

我现在就展示代码

这是有问题的组件

import '../Css/RGrid.css';
//import {useLayoutEffect} from 'react';
import React, {useCallback, useState} from 'react';
import {useEffect} from 'react';
//import {useLayoutEffect} from 'react';

//import {useLayoutEffect} from 'react';
//import {Row} from 'react-bootstrap';
//import {act} from 'react-dom/cjs/react-dom-test-utils.production.min';

const RGridTest = props => {
  const [Rows, setRows] = useState([]);
  const [rowsPerPage, setRowsPerPage] = useState(10);
  const [TotalRows, setTotalRows] = useState(0);
  const [actualPageIndex, setActualPageIndex] = useState(0);
  const [TotalPages, setTotalPages] = useState(0);
  const [counter, setCounter] = useState(0);

  const ddlPages_OnChange = value => {
    try {
      setRowsPerPage(value);
    } catch (e) {
      console.log(e.message);
    }
  };

  const Export = value => {
    console.log(value);
  };

  const EnabledPaging = () => {
    let b = false;
    try {
      b = Rows.length > 0 && Rows.length < 9999 && rowsPerPage < 9999;
    } catch (e) {
      console.log(e);
    }
    return b;
  };

  const PrevPage = () => {
    try {
      if (actualPageIndex > 1) {
        setActualPageIndex(actualPageIndex - 1);
      }
    } catch (e) {
      console.log(e.message);
    }
  };

  const NextPage = () => {
    try {
      if (actualPageIndex < TotalPages) {
        setActualPageIndex(actualPageIndex + 1);
      }
    } catch (e) {
      console.log(e.message);
    }
  };

  const calcularPaginas = useCallback(() => {
    if (Rows.length === 0) {
      console.log('Sin filas');
      return false;
    }

    console.log('llegaron las filas');
    const cantidadFilas = Rows.length;
    let iTotal = 0;

    console.log(cantidadFilas);
    if (cantidadFilas % rowsPerPage === 0) {
      console.log('Division perfecta');
      iTotal = Math.ceil(cantidadFilas / rowsPerPage);
    }
    console.log('Division imperfecta');
    iTotal = Math.ceil(cantidadFilas / rowsPerPage);
    console.log(cantidadFilas, rowsPerPage);
    console.log(iTotal);
    setTotalPages(iTotal);
  }, [Rows]);

  const ChangeId = () => {
    let sText;
    let oComplete;
    try {
      if (props.rows.length === 0) {
        console.log('No change id');
        return;
      }
      sText = JSON.stringify(props.rows);
      sText = sText.replace('"' + props.ConfigurationId + '":', '"RowId":');
      oComplete = JSON.parse(sText);
      setRows(oComplete);
      setTotalRows(oComplete.length);

      console.log('ChangeId Rows');
      console.log(oComplete.length);
    } catch (e) {
      console.log(e.message);
    }
  };

  useEffect(() => {
    ChangeId();
  }, [props.rows]);

  useEffect(() => {
    calcularPaginas();
  }, [Rows, calcularPaginas]);

  return (
    <div>
      {props.isLoading ? (
        <h2>Loading ...</h2>
      ) : (
        <React.Fragment>
          <span>
            <select
              className="Select"
              name="ddlPages"
              id="ddlPages"
              key="ddlPages"
              onChange={e => ddlPages_OnChange(e.target.value)}
            >
              <option value="10"> 10 </option>
              <option value="25"> 25 </option>
              <option value="50"> 50 </option>
              <option value="100"> 100 </option>
              <option value="9999"> All </option>
            </select>
          </span>
          {props?.Export && (
            <span>
              <button value="csv" className="btn-2" onClick={e => Export(e.target.value)}>
                CSV
              </button>
              <button value="xls" className="btn-2" onClick={e => Export(e.target.value)}>
                Excel
              </button>
              <button value="pdf" className="btn-2" onClick={e => Export(e.target.value)}>
                PDF
              </button>
            </span>
          )}
          <table width="99%" border="0" align="center">
            <tr className="TrTittle">
              <td className="TdTittle" align="center">
                <a>{props.Tittle}</a>
              </td>
            </tr>
          </table>
          <table className="Table" key="tgrid" width="99%" align="center">
            <thead key="thead">
              <tr key="trHead">
                {props.columns.map((column, idx) => {
                  return (
                    <th className="TableCellBold" width={column.WidthColumn}>
                      {column.Titulo}
                    </th>
                  );
                })}
                {props.ShowDelete && (
                  <th width="1%" className="TableCellBold">
                    Action
                  </th>
                )}
              </tr>
            </thead>
            <tbody>
              {Rows.map((row, idx) => {
                if (idx <= rowsPerPage) {
                  return (
                    <tr key={'tr' + idx}>
                      {props.columns.map((column, colx) => {
                        return (
                          <td className="TableCell" width={column.WidthColumn}>
                            {column.Selector(row)}
                          </td>
                        );
                      })}
                      {props.ShowDelete && (
                        <td className="TableCellBold" align="center">
                          <a href="#" onClick={() => props.DeleteId(row.RowId)}>
                            <img
                              className="imgDelete"
                              title="Next"
                              border="0"
                              width="18px"
                              height="18px"
                            ></img>
                          </a>
                        </td>
                      )}
                    </tr>
                  );
                }
              })}
            </tbody>
            <tfoot>
              <tr key="trFoot">
                <td
                  key="tdFoot"
                  align="right"
                  colSpan={props.columns.length + 1}
                  className="TableCellBold"
                >
                  {EnabledPaging() && (
                    <div className="DivFooter">
                      <a href="#" onClick={PrevPage()}>
                        <img
                          className="imgPrev"
                          title="Next"
                          border="0"
                          width="18px"
                          height="18px"
                        ></img>
                      </a>

                      <a>
                        {' '}
                        Page {actualPageIndex + 1} / {TotalPages}{' '}
                      </a>

                      <a href="#" onClick={NextPage()}>
                        <img
                          className="imgNext"
                          title="Next"
                          border="0"
                          width="18px"
                          height="18px"
                        ></img>
                      </a>
                    </div>
                  )}
                </td>
              </tr>
            </tfoot>
          </table>
        </React.Fragment>
      )}
      <div>
        <button onClick={() => setCounter(prev => prev + 1)}>Mostrar totalRows</button>
      </div>
    </div>
  );
};

export default RGridTest;

这是父项，如果按下了调用 API 的按钮


import './Css/App.css';
import 'bootstrap/dist/css/bootstrap.css';
import GrillaCompleta from './Components/GrillaCompleta';
import {BrowserRouter as Router, Switch, Route, Link} from 'react-router-dom';
import RGrid from './Components/RGrid';
import RGridTest from './Components/RGridTest';
import {ListAll} from './Components/Helpers';
import React, {useState} from 'react';
import TestSocialReducer from './Components/TestSocialReducer';

function App() {
  const [Dogs, setDogs] = useState([]);
  const [isCargando, setIsCargando] = useState(false);

  function FindDogs() {
    setIsCargando(true);
    ListAll().then(lDog => {
      setDogs(lDog);
      setIsCargando(false);
    });
  }

  /*
  useEffect(() => {

  }, []);
  */

  function Topics() {
    return (
      <div>
        <h2>Topic</h2>
      </div>
    );
  }

  const GrillaConfiguracion = [
    {
      Titulo: 'Nombre',
      Selector: fila => fila.name,
      WidthColumn: '30%',
      Ordenable: true,
    },
    {
      Titulo: 'Tamaño',
      Selector: fila => fila.breed_group,
      WidthColumn: '30%',
    },
  ];

  return (
    <Router>
      <div>
        <ul>
          <li key="home">
            <Link to="/">Home</Link>
          </li>
          <li key="GrillaCompleta">
            <Link to="/GrillaCompletaPrueba"> Grilla Completa Dog Test </Link>
          </li>
          <li key="Topic">
            <Link to="/topics">Topics</Link>
          </li>
          <li key="RGrilla">
            <Link to="/RGrilla">RGrilla</Link>
          </li>
          <li key="GrillaTest">
            <Link to="/RGrillaTest">RGrillaTest</Link>
          </li>
          <li key="Reducer Test">
            <Link to="/TestSocialReducer">TestSocialReducer</Link>
          </li>
        </ul>

        <Switch>
          <Route path="/rGrilla">
            <button key="btnFind" id="btnFind" onClick={FindDogs}>
              Ver Perros
            </button>
            <br></br>
            <RGrid
              key="RGrid1"
              Tittle="Grilla Dogs"
              rows={Dogs}
              columns={GrillaConfiguracion}
              ShowDelete
              Export
              DeleteId={id => console.log(id)}
              isLoading={isCargando}
            />
          </Route>
          <Route path="/rGrillaTest">
            <button key="btnFindTest" id="btnFindTest" onClick={FindDogs}>
              Ver Perros Test
            </button>
            <br></br>
            <RGridTest
              key="RGridTest"
              Tittle="Grilla Dogs Test"
              rows={Dogs}
              columns={GrillaConfiguracion}
              ShowDelete="true"
              Export="true"
              DeleteId={id => console.log(id)}
              isLoading={isCargando}
              ConfigurationId="id"
            />
          </Route>

          <Route path="/GrillaCompletaPrueba">
            <GrillaCompleta></GrillaCompleta>
          </Route>
          <Route path="/topics">
            <Topics />
          </Route>
          <Route path="/TestSocialReducer">
            <TestSocialReducer></TestSocialReducer>
          </Route>
          <Route path="/">
            <h2>Home</h2>
          </Route>
        </Switch>
      </div>
    </Router>
  );
}

export default App;

这里有问题的组件叫做


          <Route path="/rGrillaTest">
            <button key="btnFindTest" id="btnFindTest" onClick={FindDogs}>
              Ver Perros Test
            </button>
            <br></br>
            <RGridTest
              key="RGridTest"
              Tittle="Grilla Dogs Test"
              rows={Dogs}
              columns={GrillaConfiguracion}
              ShowDelete="true"
              Export="true"
              DeleteId={id => console.log(id)}
              isLoading={isCargando}
              ConfigurationId="id"
            />
          </Route>

就是这样，仅此而已，没有redux，没有外部包，什么都没有。

我希望我已经清楚了，感谢您接下来的回答

Answer 1

嗯，这个错误在 **s 中非常痛苦，但它非常简单，在 RgridTest 的 JSX 中你可以看到有一个按钮可以调用回调

<a href="#" onClick={NextPage()}>

奇怪的无限循环与 useEffect 和 useCallback

Wierd infinite loop with useEffect and useCallback

javascript

reactjs

use-effect

usecallback