微信小程序真机测试提示这个错误是什么回事？

微信小程序真机测试表单验证时报错： _vm.handleInput is not a function  

<template>  
    <view class="container" uni-common-mt>  
        <view class="title">用户注册</view>  
        <u-form ref="regForm" :model="form" class="reg-form" label-width="120">  
            <u-form-item prop="regCode" :required="true">  
                <u-input v-model="form.regCode" placeholder="请输入注册码" focus/>  
            </u-form-item>  
            <u-form-item prop="name" :required="true">  
                <u-input v-model="form.name" placeholder="请输入用户姓名"/>  
            </u-form-item>  
            <u-form-item prop="mobile" :required="true">  
                <u-input v-model="form.mobile" placeholder="请输入手机号码"/>  
            </u-form-item>  
            <u-form-item prop="password" :required="true">  
                <u-input v-model="form.password" type="password" placeholder="请输入密码"/>  
            </u-form-item>  
            <u-form-item prop="checkCode" :required="true">  
                <u-input v-model="form.checkCode" type="password" placeholder="再次输入密码"/>  
            </u-form-item>  
            <u-form-item :border-bottom="false" label="验证码:">  
                <u-input :placeholder="getAuthcode" :disabled="true" placeholder-style="color: #3F6FFE;fontWeight: bold;fontSize:32rpx;"/>  
                <u-button slot="right" type="primary" size="mini" @click="getCode">已发送</u-button>  
            </u-form-item>  
            <view class="hint">注：请将验证码发送至<text>13512716637</text>后点击已发送按钮</view>  
        </u-form>  
        <u-button type="primary" :custom-style="btnStyle" @click="sub" >注册</u-button>  
    </view>  
</template>  

<script>  
    import { checkAuthcode,checkMobile,checkRegcode,userReg } from '@/common/api/login.js'  
    export default {  
        computed:{  
            // 验证码  
            getAuthcode() {  
              const row = String(Math.floor(Math.random() * 9)) +  
                String(Math.floor(Math.random() * 9)) +  
                String(Math.floor(Math.random() * 9)) +  
                String(Math.floor(Math.random() * 9))  
              return row  
            }  
        },  
        data() {  
            return {  
                btnStyle:{  
                    position: 'absolute',  
                    bottom: '50px',  
                    left: '50%',  
                    transform: 'translateX(-50%)',  
                    width: '70%',  
                    height: '90rpx'  
                },// 按钮样式  
                rules: {  
                    regCode: [  
                        {  
                            required: true,  
                            message: '注册码不能为空！',  
                            // trigger: ['blur']  
                        },  
                        {  
                            asyncValidator: (rule, value, callback) => {  
                                checkRegcode({  
                                    data:{ code:value },  
                                    callback: (res) => {  
                                        if(res) {  
                                            callback()  
                                        } else {  
                                            callback(new Error('注册码无效!'))  
                                        }  
                                    }  
                                })  
                            },  
                            // trigger: ['blur']  
                        }  
                    ],  
                    name:[  
                        {  
                            required: true,  
                            message: '姓名不能为空！',  
                            // trigger: ['blur']  
                        },  
                        {  
                            pattern: /^[\u4e00-\u9fa5\\w]{2,4}$/,  
                            message: "请输入正确的中文姓名",  
                            trigger: 'change'  
                        }  
                    ],  
                    mobile:[  
                        {  
                            required: true,  
                            message: '手机号不能为空！',  
                            // trigger: ['blur']  
                        },  
                        {  
                            pattern: /^1[34578]\d{9}$/,  
                            message: "请输入正确的11位手机号码",  
                            trigger: 'change'  
                        },  
                        {  
                            asyncValidator: (rule, value, callback) => {  
                                checkMobile({  
                                    data:{ name:value },  
                                    callback: (res) => {  
                                        if(res) {  
                                            callback(new Error('手机号已存在!'))  
                                        } else {  
                                            callback()  
                                        }  
                                    }  
                                })  
                            },  
                        }  
                    ],  
                    password:[  
                        {  
                            required: true,  
                            message: '密码不能为空！',  
                            // trigger: ['blur']  
                        },  
                        {  
                            pattern: /^(?=.*[a-zA-Z])(?=.*\d).{8}$/,  
                            message: "请输入包含字母、数字的8位密码",  
                            trigger: 'change'  
                        }  
                    ],  
                    checkCode:[  
                        {  
                            required: true,  
                            message: '请确认密码！',  
                            // trigger: ['blur'],  
                        },  
                        {  
                            validator: (rule, value, callback) => {  
                                return value === this.form.password;  
                            },  
                            message: '两次输入的密码不一致！',  
                            trigger: 'change'  
                        }  
                    ]  
                },// 正则验证  
                form:{  
                    regCode:'',  
                    name:'',  
                    mobile:'',  
                    password:'',  
                    checkCode:''  
                },// 表单信息  
                authCode:'',// 验证码  
                check:false  
            }  
        },  
        methods:{  
            // 短信校验  
            getCode(){  

            },  
            // 提交  
            sub(){  

            }  
        },  
        onReady() {  
            this.$refs.regForm.setRules(this.rules)  
        }  
    }  
</script>