Form

Form表单组件，结合Cell、Checkbox-group、Checkbox组件等做表单校验。

示例代码：

{
  "component": true,
  "usingComponents": {
    "mp-toptips": "../components/toptips/toptips",
    "mp-cells": "../components/cells/cells",
    "mp-cell": "../components/cell/cell",
    "mp-checkbox": "../components/checkbox/checkbox",
    "mp-checkbox-group": "../components/checkbox-group/checkbox-group",
    "mp-form": "../components/form/form"
  }
}

<mp-toptips msg="{{error}}" type="error" show="{{error}}"></mp-toptips>
<view class="page" xmlns:wx="http://www.w3.org/1999/xhtml">
    <view class="page__hd">
        <view class="page__title">Form</view>
        <view class="page__desc">表单输入</view>
    </view>
    <view class="page__bd">
        <mp-form id="form" rules="{{rules}}" models="{{formData}}">
            <mp-cells title="单选列表项">
                <mp-checkbox-group prop="radio" multi="{{false}}" bindchange="radioChange">
                    <mp-checkbox wx:for="{{radioItems}}" wx:key="value" label="{{item.name}}" value="{{item.value}}" checked="{{item.checked}}"></mp-checkbox>
                </mp-checkbox-group>
            </mp-cells>
            <mp-cells title="复选列表项">
                <mp-checkbox-group prop="checkbox" multi="{{true}}" bindchange="checkboxChange">
                    <mp-checkbox wx:for="{{checkboxItems}}" wx:key="value" label="{{item.name}}" value="{{item.value}}" checked="{{item.checked}}"></mp-checkbox>
                </mp-checkbox-group>
            </mp-cells>

            <mp-cells title="表单" footer="底部说明文字底部说明文字">
                <mp-cell prop="qq" title="qq" ext-class="">
                    <input bindinput="formInputChange" data-field="qq" class="weui-input" placeholder="请输入qq"/>
                </mp-cell>
                <mp-cell prop="mobile" title="手机号" ext-class=" weui-cell_vcode">
                    <input bindinput="formInputChange" data-field="mobile" class="weui-input" placeholder="请输入手机号"/>
                    <view slot="footer" class="weui-vcode-btn">获取验证码</view>
                </mp-cell>
                <mp-cell prop="date" title="日期" ext-class="">
                    <picker data-field="date" mode="date" value="{{date}}" start="2015-09-01" end="2017-09-01" bindchange="bindDateChange">
                        <view class="weui-input">{{date}}</view>
                    </picker>
                </mp-cell>
                <mp-cell prop="vcode" title="验证码" ext-class=" weui-cell_vcode">
                    <input bindinput="formInputChange" data-field="vcode" class="weui-input" placeholder="请输入验证码"/>
                    <image slot="footer" class="weui-vcode-img" src="../images/vcode.jpg" style="width: 108px"></image>
                </mp-cell>
            </mp-cells>
            <mp-cells title="提交后表单项报错">
                <mp-cell show-error prop="idcard" title="卡号" ext-class="">
                    <input bindinput="formInputChange" data-field="idcard" class="weui-input" placeholder="请输入卡号"/>
                </mp-cell>
            </mp-cells>
        </mp-form>

        <view class="weui-cells__title">开关</view>
        <view class="weui-cells weui-cells_after-title">
            <view class="weui-cell weui-cell_switch">
                <view class="weui-cell__bd">标题文字</view>
                <view class="weui-cell__ft">
                    <switch checked />
                </view>
            </view>
        </view>

        <view class="weui-cells__title">文本框</view>
        <view class="weui-cells weui-cells_after-title">
            <view class="weui-cell">
                <view class="weui-cell__bd">
                    <input class="weui-input" placeholder="请输入文本" />
                </view>
            </view>
        </view>

        <view class="weui-cells__title">文本域</view>
        <view class="weui-cells weui-cells_after-title">
            <view class="weui-cell">
                <view class="weui-cell__bd">
                    <textarea class="weui-textarea" placeholder="请输入文本" style="height: 3.3em" />
                    <view class="weui-textarea-counter">0/200</view>
                </view>
            </view>
        </view>

        <view class="weui-cells__title">选择</view>
        <view class="weui-cells weui-cells_after-title">
            <view class="weui-cell weui-cell_select">
                <view class="weui-cell__hd" style="width: 105px">
                    <picker bindchange="bindCountryCodeChange" value="{{countryCodeIndex}}" range="{{countryCodes}}">
                        <view class="weui-select">{{countryCodes[countryCodeIndex]}}</view>
                    </picker>
                </view>
                <view class="weui-cell__bd weui-cell__bd_in-select-before">
                    <input class="weui-input" placeholder="请输入号码" />
                </view>
            </view>
        </view>

        <view class="weui-cells__title">选择</view>
        <view class="weui-cells weui-cells_after-title">
            <view class="weui-cell weui-cell_select">
                <view class="weui-cell__bd">
                    <picker bindchange="bindAccountChange" value="{{accountIndex}}" range="{{accounts}}">
                        <view class="weui-select">{{accounts[accountIndex]}}</view>
                    </picker>
                </view>
            </view>
            <view class="weui-cell weui-cell_select">
                <view class="weui-cell__hd weui-cell__hd_in-select-after">
                    <view class="weui-label">国家/地区</view>
                </view>
                <view class="weui-cell__bd">
                    <picker bindchange="bindCountryChange" value="{{countryIndex}}" range="{{countries}}">
                        <view class="weui-select weui-select_in-select-after">{{countries[countryIndex]}}</view>
                    </picker>
                </view>
            </view>
        </view>

        <checkbox-group bindchange="bindAgreeChange">
            <label class="weui-agree" for="weuiAgree">
                <view class="weui-agree__text">
                    <checkbox class="weui-agree__checkbox" id="weuiAgree" value="agree" checked="{{isAgree}}" />
                    <view class="weui-agree__checkbox-icon">
                        <icon class="weui-agree__checkbox-icon-check" type="success_no_circle" size="9" wx:if="{{isAgree}}"></icon>
                    </view>
                    阅读并同意<navigator url="" class="weui-agree__link">《相关条款》</navigator>
                </view>
            </label>
        </checkbox-group>

        <view class="weui-btn-area">
            <button class="weui-btn" type="primary" bindtap="submitForm">确定</button>
        </view>
    </view>
</view>

Component({
    data: {
        showTopTips: false,

        radioItems: [
            {name: 'cell standard', value: '0', checked: true},
            {name: 'cell standard', value: '1'}
        ],
        checkboxItems: [
            {name: 'standard is dealt for u.', value: '0', checked: true},
            {name: 'standard is dealicient for u.', value: '1'}
        ],
        items: [
            {name: 'USA', value: '美国'},
            {name: 'CHN', value: '中国', checked: 'true'},
            {name: 'BRA', value: '巴西'},
            {name: 'JPN', value: '日本'},
            {name: 'ENG', value: '英国'},
            {name: 'TUR', value: '法国'},
        ],

        date: "2016-09-01",
        time: "12:01",

        countryCodes: ["+86", "+80", "+84", "+87"],
        countryCodeIndex: 0,

        countries: ["中国", "美国", "英国"],
        countryIndex: 0,

        accounts: ["微信号", "QQ", "Email"],
        accountIndex: 0,

        isAgree: false,
        formData: {

        },
        rules: [{
            name: 'radio',
            rules: {required: true, message: '单选列表是必选项'},
        }, {
            name: 'checkbox',
            rules: {required: true, message: '多选列表是必选项'},
        }, {
            name: 'qq',
            rules: {required: true, message: 'qq必填'},
        }, {
            name: 'mobile',
            rules: [{required: true, message: 'mobile必填'}, {mobile: true, message: 'mobile格式不对'}],
        }, {
            name: 'vcode',
            rules: {required: true, message: '验证码必填'},
        }, {
            name: 'idcard',
            rules: {required: true, message: 'idcard必填'},
        }]
    },
    methods: {
        radioChange: function (e) {
            console.log('radio发生change事件，携带value值为：', e.detail.value);
    
            var radioItems = this.data.radioItems;
            for (var i = 0, len = radioItems.length; i < len; ++i) {
                radioItems[i].checked = radioItems[i].value == e.detail.value;
            }
    
            this.setData({
                radioItems: radioItems,
                [`formData.radio`]: e.detail.value
            });
        },
        checkboxChange: function (e) {
            console.log('checkbox发生change事件，携带value值为：', e.detail.value);
    
            var checkboxItems = this.data.checkboxItems, values = e.detail.value;
            for (var i = 0, lenI = checkboxItems.length; i < lenI; ++i) {
                checkboxItems[i].checked = false;
    
                for (var j = 0, lenJ = values.length; j < lenJ; ++j) {
                    if(checkboxItems[i].value == values[j]){
                        checkboxItems[i].checked = true;
                        break;
                    }
                }
            }
    
            this.setData({
                checkboxItems: checkboxItems,
                [`formData.checkbox`]: e.detail.value
            });
        },
        bindDateChange: function (e) {
            this.setData({
                date: e.detail.value,
                [`formData.date`]: e.detail.value
            })
        },
        formInputChange(e) {
            const {field} = e.currentTarget.dataset
            this.setData({
                [`formData.${field}`]: e.detail.value
            })
        },
        bindTimeChange: function (e) {
            this.setData({
                time: e.detail.value
            })
        },
        bindCountryCodeChange: function(e){
            console.log('picker country code 发生选择改变，携带值为', e.detail.value);
    
            this.setData({
                countryCodeIndex: e.detail.value
            })
        },
        bindCountryChange: function(e) {
            console.log('picker country 发生选择改变，携带值为', e.detail.value);
    
            this.setData({
                countryIndex: e.detail.value
            })
        },
        bindAccountChange: function(e) {
            console.log('picker account 发生选择改变，携带值为', e.detail.value);
    
            this.setData({
                accountIndex: e.detail.value
            })
        },
        bindAgreeChange: function (e) {
            this.setData({
                isAgree: !!e.detail.value.length
            });
        },
        submitForm() {
            this.selectComponent('#form').validate((valid, errors) => {
                console.log('valid', valid, errors)
                if (!valid) {
                    const firstError = Object.keys(errors)
                    if (firstError.length) {
                        this.setData({
                            error: errors[firstError[0]].message
                        })
    
                    }
                } else {
                    wx.showToast({
                        title: '校验通过'
                    })
                }
            })
        }

    }
});

属性列表

属性	类型	必填	说明
ext-class	string	否	添加在组件内部结构的class，可用于修改组件内部的样式
rules	object<array>	否	表单校验的规则列表，格式下面详细介绍
models	object	否	需要校验的表单的数据
bindsuccess	eventhandler	否	校验成功触发的事件，detail是{trigger}，trigger的值是change或validate，表示是输入改成触发的校验还是主动调用的validate接口
bindfail	eventhandler	否	校验失败触发的事件，detail是{trigger, errors}，trigger的值是change或validate，表示是输入改成触发的校验还是主动调用的validate接口。errors是错误的字段列表。

rules是表单校验的规则列表，列表每一项表示一个字段的校验规则，注意，必须要在Cell或Checkbox-group组件声明prop属性，表单校验规则才生效，表单校验规则的定义如下：

属性	类型	必填	说明
name	string	是	校验的字段名
rules	array/object	是	校验的规则，如果有多项，则是数组
rules.message	string	否	校验失败时候提示的文字
rules.validator	function	否	自定义校验函数，接受rule, value, param, models四个参数，其中rule格式为{name: '字段名', message: '失败信息'}, value是字段值，param是校验参数，models是form组件的models属性。函数返回错误提示，表示校验失败，错误提示会通过回调返回给开发者
rules.[rule]	string	否	rule是变量，表示内置的校验规则名称，比如required，则校验规则对象为{name: "fieldName", rules: {required: true}}，下面会详细介绍所有的内置规则

内置校验规则

规则名	参数	说明
required		是否必填
minlength	number	最小长度
maxlength	number	最大长度
rangelength	[number, number]	长度范围，参数为[最小长度，最大长度]
bytelength	number	字节长度
range	[number, number]	数字的大小范围
min	number	最小值限制
max	number	最大值限制
mobile		手机号码校验
email		电子邮件校验
url		URL链接地址校验
equalTo	string	相等校验，参数是另外一个字段名