Question

我是React JS的新手。问题是我需要在这段代码中显示数据库中的所有字段。我已经能够在浏览器控制台中获取所有数据作为对象，并且我能够在浏览器中查看数组中的最后一块数据但是无法查看它们。请原谅我代码中的错误格式，因为我是新手。请提前感谢.....

输出和代码

浏览器视图： Land of Toys Inc.的名称是131是ID

JSON数据：

{"posts":[
  {"id":"103","name":"Atelier graphique"},
  {"id":"112","name":"Signal Gift Stores"},
  {"id":"114","name":"Australian Collectors, Co."},
  {"id":"119","name":"La Rochelle Gifts"},
  {"id":"121","name":"Baane Mini Imports"},
  {"id":"124","name":"Mini Gifts Distributors Ltd."},
  {"id":"125","name":"Havel & Zbyszek Co"},
  {"id":"128","name":"Blauer See Auto, Co."},
  {"id":"129","name":"Mini Wheels Co."},
  {"id":"131","name":"Land of Toys Inc."}
]}

这些数据是通过编写为插件的PHP代码获得的，该插件采用JS代码中给出的url形式

http://localhost/Akshay/REACT/testDataAPI.php?user=2&num=10&format=json

我的代码：

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>React Tutorial</title>
    <!-- Not present in the tutorial. Just for basic styling. -->
    <link rel="stylesheet" href="css/base.css" />
    <script src="https://npmcdn.com/react@15.3.0/dist/react.js"></script>
    <script src="https://npmcdn.com/react-dom@15.3.0/dist/react-dom.js"></script>
    <script src="https://npmcdn.com/babel-core@5.8.38/browser.min.js"></script>
    <script src="https://npmcdn.com/jquery@3.1.0/dist/jquery.min.js"></script>
    <script src="https://npmcdn.com/remarkable@1.6.2/dist/remarkable.min.js"></script>
  </head>
  <body>
    <div id="content"></div>

    <script type="text/babel">


var UserGist = React.createClass({
  getInitialState: function() {
    return {

      username:[],
      companyID:[]
    };
  },

  componentDidMount: function() 
  {

    var rows = [];

   this.serverRequest = $.get(this.props.source, function (result) {

      for (var i=0; i < 10; i++) 
      {
            var lastGist = result.posts[i];
            //console.log(result.posts[i]);
            this.setState({
            username: lastGist.id,
            companyID: lastGist.name
            });
      }

     }.bind(this));

  },

  componentWillUnmount: function() {
    this.serverRequest.abort();
  },

  render: function() {
            return (
        <li>{this.state.companyID} is the name {this.state.username} is the ID</li>
        );

  }
});


ReactDOM.render(
  <UserGist source="http://localhost/Akshay/REACT/testDataAPI.php?user=2&num=10&format=json" />,
  document.getElementById('content')
); 

    </script>
  </body>
</html>

Answer 1

使用地图渲染数据。并将json存储为状态本身的javascript对象，而不是两个单独的数组。

 <!-- Not present in the tutorial. Just for basic styling. -->
    <link rel="stylesheet" href="css/base.css" />
    <script src="https://npmcdn.com/react@15.3.0/dist/react.js"></script>
    <script src="https://npmcdn.com/react-dom@15.3.0/dist/react-dom.js"></script>
    <script src="https://npmcdn.com/babel-core@5.8.38/browser.min.js"></script>
    <script src="https://npmcdn.com/jquery@3.1.0/dist/jquery.min.js"></script>
    <script src="https://npmcdn.com/remarkable@1.6.2/dist/remarkable.min.js"></script>
    <div id="content"></div>

    <script type="text/babel">


var UserGist = React.createClass({
  getInitialState: function() {
    return {

     data: [{"id":"103","name":"Atelier graphique"},
  {"id":"112","name":"Signal Gift Stores"},
  {"id":"114","name":"Australian Collectors, Co."},
  {"id":"119","name":"La Rochelle Gifts"},
  {"id":"121","name":"Baane Mini Imports"},
  {"id":"124","name":"Mini Gifts Distributors Ltd."},
  {"id":"125","name":"Havel & Zbyszek Co"},
  {"id":"128","name":"Blauer See Auto, Co."},
  {"id":"129","name":"Mini Wheels Co."},
  {"id":"131","name":"Land of Toys Inc."}]
    };
  },

  componentDidMount: function() 
  {

  },

  componentWillUnmount: function() {
    this.serverRequest.abort();
  },

  render: function() {
            return (
            <div>
        {this.state.data.map(function(item, index){
          return    <li>{item.name} is the company name, {item.id} is the ID</li>

        })}</div>
        );

  }
});


ReactDOM.render(
  <UserGist source="http://localhost/Akshay/REACT/testDataAPI.php?user=2&num=10&format=json" />,
  document.getElementById('content')
); 

    </script>
</html>

<强> JSFIDDLE

对于小提琴示例，我删除了$.get()中的componentDidMount代码。

P.S。将状态数组数据创建为对象数组，如下所示小提琴示例

Answer 2

我认为这对你有帮助。

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>React Tutorial</title>
    <!-- Not present in the tutorial. Just for basic styling. -->
    <link rel="stylesheet" href="css/base.css" />
    <script src="https://npmcdn.com/react@15.3.0/dist/react.js"></script>
    <script src="https://npmcdn.com/react-dom@15.3.0/dist/react-dom.js"></script>
    <script src="https://npmcdn.com/babel-core@5.8.38/browser.min.js"></script>
    <script src="https://npmcdn.com/jquery@3.1.0/dist/jquery.min.js"></script>
    <script src="https://npmcdn.com/remarkable@1.6.2/dist/remarkable.min.js"></script>
  </head>
  <body>
    <div id="content"></div>

    <script type="text/babel">


var UserGist = React.createClass({
  getInitialState: function() {
    return {

      username:[],
      companyID:[]
    };
  },

  componentDidMount: function() 
  {

    var rows = [];

   this.serverRequest = $.get(this.props.source, function (result) {
      var username = [];
      var companyID = [];
      for (var i=0; i < 10; i++) 
      {
            var lastGist = result.posts[i];
            //console.log(result.posts[i]);
            username.push(lastGist.id);
            companyID.push(lastGist.name);
      }
      this.setState({
            username: username,
            companyID: companyID,
      });
     }.bind(this));

  },

  componentWillUnmount: function() {
    this.serverRequest.abort();
  },

  render: function() {
      return (
        <div>
    {this.state.companyID.map(function(item, index){
      return    <li>{item} is the company name,              {this.state.username[index]} is the ID</li>
    })}</div>
        );

  }
});


ReactDOM.render(
  <UserGist source="http://localhost/Akshay/REACT/testDataAPI.php?user=2&num=10&format=json" />,
  document.getElementById('content')
); 

    </script>
  </body>
</html>

REACT JS：映射在JSX中呈现的对象数组

2 个答案: