Question

        <FormGroup>
          <div>
            {this.props.diseases.map((disease, index) => (
              <FormGroup>
                <CustomInput
                  type="switch" 
                  id="exampleCustomSwitch"
                  key={disease}
                  disease={disease}
                  onClick={(disease) => this.props.toggle(disease)}
                  label={disease}
                />
              </FormGroup>
            ))
            }
          </div>
        </FormGroup>

我希望能够找到开关的状态，无论它是打开还是关闭。不知道我该怎么做？我是否要传递某种默认值，将0设置为off，将1设置为on？
当前，这些开关正在从阵列中进行适当的映射，但是打开或关闭仅适用于第一个开关。因此，如果我单击任何其他开关，则由于某种原因，第一个开关会切换。

Answer 1

对于＃1点，y您可以使用e.target.checked来检查特定CustomInput的是/否状态；选中this stackblitz即可查看

对于第2点，如果您共享现有代码，则可以更轻松地帮助您解决特定情况

相关的 js ：

class App extends Component {
  constructor() {
    super();
    this.state = {
      name: "World to React",
      log: []
    };
    this.customInputSwitched.bind(this);
  }

  customInputSwitched(buttonName, e) {
    let newStr = `we received ${e.target.checked} for ${buttonName}...`;
    console.log(newStr);
    let newLog = [...this.state.log, newStr];
    this.setState({ log: newLog });
  }

  render() {
    var testName = "modal for testing - click here";
    return (
      <div>
        <Hello name={this.state.name} />
        <p>Start editing to see some magic happen :)</p>
        <Form>
          <FormGroup>
            <Label for="exampleCheckbox">Switches</Label>
            <div>
              <CustomInput
                type="switch"
                id="exampleCustomSwitch"
                name="customSwitch"
                label="Turn on this custom switch"
                onChange={this.customInputSwitched.bind(this, "button1")}
              />
              <CustomInput
                type="switch"
                id="exampleCustomSwitch2"
                name="customSwitch"
                label="Or this one"
                onChange={this.customInputSwitched.bind(this, "button2")}
              />
              <CustomInput
                type="switch"
                id="exampleCustomSwitch3"
                label="But not this disabled one"
                disabled
              />
              <CustomInput
                type="switch"
                id="exampleCustomSwitch4"
                label="Can't click this label to turn on!"
                htmlFor="exampleCustomSwitch4_X"
                disabled
              />
            </div>
          </FormGroup>
        </Form>
        {this.state.log}
      </div>
    );
  }
}

更新＃1 ：鉴于以下提问者的评论

您在https://stackblitz.com/edit/react-rcqlwq的代码中几乎没有问题

您必须实例化构造器中的Log in状态
customInputSwitched函数应传递特定按钮的参数，而不是硬编码的“ button1”-因此我们添加了疾病的索引号
所有按钮的ID不能是相同的“ exampleCustomSwitch”，因此我们只需将索引号添加到ID
映射为数组的最佳实践是还包括一个索引，这有好处（如以下两点所示）

与您的代码/ stackblitz相关的可运行JS ：

class App extends Component {
  constructor() {
    super();
    this.state = {
      diseases: [
  "Normal",
  "Over inflated lungs",
  "Pneumonia",
  "Pneumothorax",
  "Congestive cardiac failure",
  "Consolidation",
  "Hilar enlargement",
  "Medical device",
  "Effusion"
],
log: []
    };
    this.customInputSwitched.bind(this);
  }

  customInputSwitched(buttonName, e) {
    let newStr = `we received ${e.target.checked} for ${buttonName}...`;
    console.log(newStr);
    let newLog = [...this.state.log, newStr];
    this.setState({ log: newLog });
  }

  render() {
    return (
      <div>
        <p>Start editing to see some magic happen :)</p>
        <Form>
          <FormGroup>
            <Label for="exampleCheckbox">Switches</Label>
            {this.state.diseases.map((disease, index) => {
              //console.log(disease, index);
              let idName = "exampleCustomSwitch"+index;

              return (
              <div key={index}>
                <CustomInput
                type="switch"
                id={idName}
                name="customSwitch"
                label={disease}
                onChange={this.customInputSwitched.bind(this, "button"+index)}
              />
              </div>
              );
            }

            )}
          </FormGroup>
        </Form>
        {this.state.log}
      </div>
    );
  }
}

如何获取Reactstrap的CustomInput Switch组件的状态，以及如何从数组映射开关？

1 个答案: