antd + react自定义校验

                    <Form.Item
                        label="文章标题"
                        name="articaltest"
                        rules={[{ 
                            validator: (rule, value) => {
                                console.log({rule, value})
                            }
                         }]}
                        validateStatus={this.state.myvalidateStatus}
                        hasFeedback
                        help={this.state.myhelp}
                        rules={[{ 
                            validator: async (rule, value) => {
                                console.log({rule, value});
                                if (value.length > 5) {
                                    throw new Error('超出最大长度');
                                    this.setState({
                                        myvalidateStatus: 'error',
                                        myhelp: '超出最大长度'
                                    })
                                } else{
                                   this.setState({
                                        myvalidateStatus: undefined,
                                        myhelp: undefined
                                    }) 
                                }
                            }
                         }]}
                    >
                        <Input placeholder='请输入文章标题' />
                    </Form.Item>