动态地对用户输入反应js

时间：2017-03-11 09:59:53

标签： reactjs 

import React, { Component } from 'react';
import { Link } from 'react-router'
import { Dropdown, DropdownMenu, DropdownItem, Progress } from 'reactstrap';

class Modals extends Component {
  constructor(){
    super();
    alert("start3e");
fetch("http://api-env.bt2qjip33m.ap-south-1.elasticbeanstalk.com/api/v1/beacons" ,
 {
  method: 'post',
  headers: {
    'Content-Type': 'application/json',
    'Authorization' : 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1OGMyOTdiOWQzZWM4NjY4MDMwNDBlNjgiLCJlbWFpbCI6ImtrQGxpdGlmZXIuY29tIiwiZmlyc3ROYW1lIjoiS2lzaGxheSIsImxhc3ROYW1lIjoiS2lzaG9yZSIsImlhdCI6MTQ4OTE0NzgzM30.nHW5w3SSov8ySziblmw2VNlGI3CsZFR-v41Jeg9uBVs'
},
body: JSON.stringify({
    name: "beacon name 123",
    description: "beacon description here for beacon",
    uuid: "mnvijefnvj4356vrev",
    major: "7",
    minor: "9",
    manufacturer: "m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24",
    beaconType: "type9",
    location: "main gate8",
    floor: "ist",
    zone: "58c29c06d3ec866803040e6e"
})
}).then(function(response){
  if(response.ok) {
      console.log(response)
    return response;
  }
  throw new Error('Network response was not ok.');
}).then(function(data) { 
  console.log(data);
})
.catch(function(error) {
  console.log('There has been a problem with your fetch operation: ' + error);
});
}
  render() {
    return (<div><div>
          <div className="animated fadeIn">
            <br /><div className="card" style={{ width: 57 + '%' }}>
              <div className="card-header">
                 Beacon Settings
              </div>
              <div className="card-block">
                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="icon-user"></i></span>
                  <input type="text" className="form-control" placeholder="UUID" />
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" placeholder="Major Number"/>
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" placeholder="Minor Number"/>
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" placeholder="Manufacturer Number"/>
                </div><center>
                <Link to={'/components/tabs'} style={{ width: 27 + '%' }} className="nav-link btn btn-block btn-success" activeClassName="active">Save</Link>

<Link to={'/components/tabs'} style={{ width: 27 + '%' }} className="nav-link btn btn-block btn-success" activeClassName="active">Advance Settings</Link>
</center>

            </div>
          </div>
</div></div>
      </div>
      
        
      
    )
  }
}

export default Modals;

我只想从屏幕上获取用户输入。 该怎么做？ 之后，我将使用post request在服务器上发布这些值，这是正常工作。 我只想在屏幕上的字段中使用用户值，并将这些值动态发送到服务器

2 个答案:

答案 0 :(得分：0)

通常我使用redux-form，这样可以很容易地在表单提交上收集值。

如果您没有使用它（我没有看到您这样做），您可以执行以下操作之一：

  1. 将状态引入整个组件，并将onChange处理程序引入更新状态的所有输入
  2. 将ref设置为每个输入并获取提交处理函数中的值。

    3. 如果您没有需要验证表格的情况，那么您不需要州和参考可以帮助您。

    所以完整的代码示例将是：

    import React, {Component} from 'react';
import {Link} from 'react-router'
import {Dropdown, DropdownMenu, DropdownItem, Progress} from 'reactstrap';

class Modals extends Component {
  constructor() {
    super();

    this.handleSubmit = this.handleSubmit.bind(this);
  }

  handleSubmit() {
    const uuid = this.uuid.value;
    const manufacturer = this.manufacturerNumber.value;
    const minor = this.minorNumber.value;
    const major = this.majorNumber.value;

    fetch("http://api-env.bt2qjip33m.ap-south-1.elasticbeanstalk.com/api/v1/beacons" ,
     {
      method: 'post',
      headers: {
        'Content-Type': 'application/json',
        'Authorization' : 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1OGMyOTdiOWQzZWM4NjY4MDMwNDBlNjgiLCJlbWFpbCI6ImtrQGxpdGlmZXIuY29tIiwiZmlyc3ROYW1lIjoiS2lzaGxheSIsImxhc3ROYW1lIjoiS2lzaG9yZSIsImlhdCI6MTQ4OTE0NzgzM30.nHW5w3SSov8ySziblmw2VNlGI3CsZFR-v41Jeg9uBVs'
    },
    body: JSON.stringify({
        name: "beacon name 123",
        description: "beacon description here for beacon",
        uuid: uuid,
        major: major,
        minor: minor,
        manufacturer: manufacturer,
        beaconType: "type9",
        location: "main gate8",
        floor: "ist",
        zone: "58c29c06d3ec866803040e6e"
    })
    }).then(function(response){
      if(response.ok) {
          console.log(response)
        return response;
      }
      throw new Error('Network response was not ok.');
    }).then(function(data) {
      console.log(data);
    })
    .catch(function(error) {
      console.log('There has been a problem with your fetch operation: ' + error);
    });
  }

  render() {
    return (
      <form onSubmit={this.handleSubmit}>
        <div className="animated fadeIn">
          <br/>
          <div className="card" style={{
            width: 57 + '%'
          }}>
            <div className="card-header">
              Beacon Settings
            </div>
            <div className="card-block">
              <div className="input-group mb-1">
                <span className="input-group-addon">
                  <i className="icon-user" />
                </span>
                <input
                  ref={ref => (this.uuid = ref)}
                  type="text"
                  className="form-control"
                  placeholder="UUID"
                />
              </div>

              <div className="input-group mb-1">
                <span className="input-group-addon">
                  <i className="fa fa-align-justify" />
                </span>
                <input
                  ref={ref => (this.majorNumber = ref)}
                  type="text"
                  className="form-control"
                  placeholder="Major Number"
                />
              </div>

              <div className="input-group mb-1">
                <span className="input-group-addon">
                  <i className="fa fa-align-justify" />
                </span>
                <input
                  ref={ref => (this.minorNumber = ref)}
                  type="text"
                  className="form-control"
                  placeholder="Minor Number"
                />
              </div>

              <div className="input-group mb-1">
                <span className="input-group-addon">
                  <i className="fa fa-align-justify" />
                </span>
                <input
                  ref={ref => (this.manufacturerNumber = ref)}
                  type="text"
                  className="form-control"
                  placeholder="Manufacturer Number"
                />
              </div>

              <center>
                <Button type="submit" color="primary">
                  Click me to send values to the api!
                </Button>
                <Link to={'/components/tabs'}
                  className="nav-link btn btn-block btn-success"
                  activeClassName="active"
                  style={{
                    width: 27 + '%'
                  }}
                >
                  Save
                </Link>

                <Link to={'/components/tabs'}
                  className="nav-link btn btn-block btn-success"
                  activeClassName="active"
                  style={{
                    width: 27 + '%'
                  }}
                >
                  Advanced Settings
                </Link>
              </center>
            </div>
          </div>
        </div>
      </form>
    )
  }
}

export default Modals;

    我没有对它进行过测试，但它可以帮助您了解该怎么做。 通常我不使用refs来获取输入的值，因为我在所有最近的项目中都使用了redux-form。一定要检查一下。

答案 1 :(得分：0)

＆＃13;
＆＃13; 
import React, { Component } from 'react';
import { Link } from 'react-router'
import { Dropdown, DropdownMenu, DropdownItem, Progress } from 'reactstrap';

class Modals extends Component {
  constructor(props){
    super(props);
    this.state = {inputuuid: '',
    inputmajor: '' ,
    inputminor: '' ,
    inputmanufacturer: ''};
    this.handleUuid = this.handleUuid.bind(this);
    this.handleMajor = this.handleMajor.bind(this);
    this.handleMinor = this.handleMinor.bind(this);
    this.handleManufacturer = this.handleManufacturer.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
    alert("started");
fetch("http://api-env.bt2qjip33m.ap-south-1.elasticbeanstalk.com/api/v1/beacons" ,
 {
  method: 'post',
  headers: {
    'Content-Type': 'application/json',
    'Authorization' : 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1OGMyOTdiOWQzZWM4NjY4MDMwNDBlNjgiLCJlbWFpbCI6ImtrQGxpdGlmZXIuY29tIiwiZmlyc3ROYW1lIjoiS2lzaGxheSIsImxhc3ROYW1lIjoiS2lzaG9yZSIsImlhdCI6MTQ4OTE0NzgzM30.nHW5w3SSov8ySziblmw2VNlGI3CsZFR-v41Jeg9uBVs'
},
body: JSON.stringify({
    name: "beacon name 1234",
    description: "beacon description here for beacon",
    uuid: this.state.inputuuid,
    major: "{this.state.inputmajor}",
    minor: "{this.state.inputminor}",
    manufacturer: "{this.state.inputmanufacturer}",
    beaconType: "type9",
    location: "main gate8",
    floor: "ist",
    zone: "58c29c06d3ec866803040e6e"
})
}).then(function(response){
  if(response.ok) {
      console.log(response)
    return response;
  }
  throw new Error('Network response was not ok.');
}).then(function(data) { 
  console.log(data);
})
.catch(function(error) {
  console.log('There has been a problem with your fetch operation: ' + error);
});
}

handleUuid(event) {

    this.setState({inputuuid: event.target.value});
  }
  handleMajor(event){
    this.setState({inputmajor: event.target.value});
  }
  handleMinor(event){
    this.setState({inputminor: event.target.value});
  }
  handleManufacturer(event){
        this.setState({inputmanufacturer: event.target.value});
  }
handleSubmit(event) {

    alert('Submitted: ' + this.state.inputuuid + this.state.inputmajor + this.state.inputminor + this.state.inputmanufacturer);
    event.preventDefault();
  }

  render() {
    const uuid= this.state.inputuuid;
    return (<div><div>
          <div className="animated fadeIn">
            <br /><div className="card" style={{ width: 57 + '%' }}>
              <div className="card-header">
                 Beacon Settings
              </div>
              <div className="card-block">
                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="icon-user"></i></span>
                  <input type="text"  className="form-control" value={this.state.inputuuid} onChange={this.handleUuid} placeholder="UUID" />
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" value={this.state.inputmajor} onChange={this.handleMajor} placeholder="Major Number"/>
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" value={this.state.inputminor} onChange={this.handleMinor} placeholder="Minor Number"/>
                </div>

                <div className="input-group mb-1">
                  <span className="input-group-addon"><i className="fa fa-align-justify"></i></span>
                  <input type="text" className="form-control" value={this.state.inputmanufacturer} onChange={this.handleManufacturer} placeholder="Manufacturer Number"/>
                </div><center>
                <Link to={'/components/tabs'} style={{ width: 27 + '%' }} className="nav-link btn btn-block btn-success"  onClick={this.handleSubmit} activeClassName="active">Save</Link>

<Link to={'/components/tabs'} style={{ width: 27 + '%' }} className="nav-link btn btn-block btn-success" activeClassName="active">Advance Settings</Link>
</center>

            </div>
          </div>
</div></div>
      </div>
      
        
      
    )
  }
}

export default Modals;
＆＃13;
＆＃13;
＆＃13;

这是答案，因为我在不同的输入上应用了不同的状态

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