ant-design/components/form/demo/validate-customized.md

---
order: 13
title: 自定义校验规则
---

密码校验实例。

这里使用了 `this.props.form.validateFields` 方法，在对第一次输入的密码进行校验时会触发二次密码的校验。

````jsx
import { Button, Form, Input, Row, Col } from 'antd';
import classNames from 'classnames';
const createForm = Form.create;
const FormItem = Form.Item;

function noop() {
  return false;
}

let Demo = React.createClass({
  getInitialState() {
    return {
      passBarShow: false, // 是否显示密码强度提示条
      rePassBarShow: false,
      passStrength: 'L', // 密码强度
      rePassStrength: 'L',
    };
  },

  handleSubmit() {
    this.props.form.validateFields((errors, values) => {
      if (!!errors) {
        console.log('Errors in form!!!');
        return;
      }
      console.log('Submit!!!');
      console.log(values);
    });
  },

  getPassStrenth(value, type) {
    if (value) {
      let strength;
      // 密码强度的校验规则自定义，这里只是做个简单的示例
      if (value.length < 6) {
        strength = 'L';
      } else if (value.length <= 9) {
        strength = 'M';
      } else {
        strength = 'H';
      }
      if (type === 'pass') {
        this.setState({ passBarShow: true, passStrength: strength });
      } else {
        this.setState({ rePassBarShow: true, rePassStrength: strength });
      }
    } else {
      if (type === 'pass') {
        this.setState({ passBarShow: false });
      } else {
        this.setState({ rePassBarShow: false });
      }
    }
  },

  checkPass(rule, value, callback) {
    const form = this.props.form;
    this.getPassStrenth(value, 'pass');

    if (form.getFieldValue('pass')) {
      form.validateFields(['rePass'], { force: true });
    }

    callback();
  },

  checkPass2(rule, value, callback) {
    const form = this.props.form;
    this.getPassStrenth(value, 'rePass');

    if (value && value !== form.getFieldValue('pass')) {
      callback('两次输入密码不一致！');
    } else {
      callback();
    }
  },

  renderPassStrengthBar(type) {
    const strength = type === 'pass' ? this.state.passStrength : this.state.rePassStrength;
    const classSet = classNames({
      'ant-pwd-strength': true,
      'ant-pwd-strength-low': strength === 'L',
      'ant-pwd-strength-medium': strength === 'M',
      'ant-pwd-strength-high': strength === 'H',
    });
    const level = {
      L: '低',
      M: '中',
      H: '高',
    };

    return (
      <div>
        <ul className={classSet}>
          <li className="ant-pwd-strength-item ant-pwd-strength-item-1"></li>
          <li className="ant-pwd-strength-item ant-pwd-strength-item-2"></li>
          <li className="ant-pwd-strength-item ant-pwd-strength-item-3"></li>
          <span className="ant-form-text">
            {level[strength]}
          </span>
        </ul>
      </div>
    );
  },

  render() {
    const { getFieldProps } = this.props.form;

    const passProps = getFieldProps('pass', {
      rules: [
        { required: true, whitespace: true, message: '请填写密码' },
        { validator: this.checkPass },
      ],
      onChange: (e) => {
        console.log('你的密码就是这样被盗的：', e.target.value);
      },
    });
    const rePassProps = getFieldProps('rePass', {
      rules: [{
        required: true,
        whitespace: true,
        message: '请再次输入密码',
      }, {
        validator: this.checkPass2,
      }],
    });
    const formItemLayout = {
      labelCol: { span: 6 },
      wrapperCol: { span: 18 },
    };
    return (
      <div>
        <Form horizontal form={this.props.form}>
          <Row>
            <Col span="18">
              <FormItem
                {...formItemLayout}
                label="密码：">
                <Input {...passProps} type="password"
                  onContextMenu={noop} onPaste={noop} onCopy={noop} onCut={noop}
                  autoComplete="off" id="pass"
                />
              </FormItem>
            </Col>
            <Col span="6">
              {this.state.passBarShow ? this.renderPassStrengthBar('pass') : null}
            </Col>
          </Row>

          <Row>
            <Col span="18">
              <FormItem
                {...formItemLayout}
                label="确认密码：">
                <Input {...rePassProps} type="password"
                  onContextMenu={noop} onPaste={noop} onCopy={noop} onCut={noop}
                  autoComplete="off" id="rePass"
                />
              </FormItem>
            </Col>
            <Col span="6">
              {this.state.rePassBarShow ? this.renderPassStrengthBar('rePass') : null}
            </Col>
          </Row>
          <Row>
            <Col span="18">
              <Col span="18" offset="6">
                <Button type="primary" onClick={this.handleSubmit}>提交</Button>
              </Col>
            </Col>
          </Row>
        </Form>
      </div>
    );
  },
});

Demo = createForm()(Demo);

ReactDOM.render(<Demo />, mountNode);
````

````css
.ant-pwd-strength {
  display: inline-block;
  margin-left: 8px;
  line-height: 32px;
  height: 32px;
  vertical-align: middle;
}

.ant-pwd-strength-item {
  float: left;
  margin-right: 1px;
  margin-top: 12px;
  width: 19px;
  height: 8px;
  line-height: 8px;
  list-style: none;
  background-color: #f3f3f3;
  transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
}

.ant-pwd-strength-item-1 {
  border-top-left-radius: 6px;
  border-bottom-left-radius: 6px;
}

.ant-pwd-strength-item-2 {
  width: 20px;
}

.ant-pwd-strength-item-3 {
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
  margin-right: 8px;
}

.ant-pwd-strength-low .ant-pwd-strength-item-1, .ant-pwd-strength-medium .ant-pwd-strength-item-1, .ant-pwd-strength-high .ant-pwd-strength-item-1 {
  background-color: #FAC450;
}

.ant-pwd-strength-medium .ant-pwd-strength-item-2, .ant-pwd-strength-high .ant-pwd-strength-item-2 {
  background-color: rgba(135, 208, 104, .6);
  filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#9987D068,endColorstr=#9987D068);
}

.ant-pwd-strength-high .ant-pwd-strength-item-3 {
  background-color: #87D068;
}
````