原理
index.wxml
<form bindsubmit="submitForm">
<view class="we_cell">
<view class="user_info">
<view class="we_hd">
<view class="wenzi">昵称:</view>
</view>
<view class="name_info">
<input name="name" value="{{form.name}}" class="we-input" type="text" placeholder="请输入姓名" />
</view>
</view>
<view class="tel_info">
<view class="we_hd">
<view class="wenzi">电话:</view>
</view>
<view class="name_info">
<input name="tel" value="{{form.tel}}" class="we-input" type="text" placeholder="请输入联系方式" />
</view>
</view>
<view class="mailbox_info">
<view class="we_hd">
<view class="wenzi">邮箱:</view>
</view>
<view class="name_info">
<input name="email" value="{{form.email}}" class="we-input" type="text" placeholder="请输入邮箱" />
</view>
</view>
<view class="address_info">
<view class="we_hd">
<view class="wenzi">地址:</view>
</view>
<view class="name_info">
<input name="address" value="{{form.address}}" class="we-input" type="text" placeholder="请输入地址" />
</view>
</view>
<view class="sub_user">
<button class="we_btn" type="primary" formType="submit">确定</button>
</view>
</view>
</form>
index.js
import WxValidate from ‘../../utils/js/WxValidate‘;
Page({
submitForm(e) {
console.log(e)
let params = e.detail.value;
if (!this.WxValidate.checkForm(e)) {
let error = this.WxValidate.errorList[0];
console.log(error);
wx.showModal({
title: ‘友情提示‘,
content: `${error.param}:${error.msg}`,
showCancel: false,
success: (result) => {
console.log(result);
if (result.confirm) {
}
},
fail: () => {},
complete: () => {}
});
return false;
};
console.log(e.detail.value);
},
/**
* 生命周期函数--监听页面加载
*/
onLoad: function(options) {
this.WxValidate = new WxValidate({
name: {
required: true,
minlength: 2,
maxlength: 10
},
tel: {
required: true,
tel: true
},
email: {
required: true,
email: true
},
address: {
required: true,
minlength: 2,
maxlength: 100
},
}, {
name: {
required: ‘请输入昵称‘
},
tel: {
required: ‘请输入电话‘
},
email: {
required: ‘请输入邮箱‘
},
address: {
required: ‘请输入地址‘
}
});
WxValidate: (rules, message) => new WxValidate(rules, message);
}
})
效果展示
附上我所用的表单验证js
/**
* 表单验证
*
* @param {Object} rules 验证字段的规则
* @param {Object} messages 验证字段的提示信息
*
*/
class WxValidate {
constructor(rules = {}, messages = {}) {
Object.assign(this, {
rules,
messages,
});
this.__init();
}
/**
* __init函数，初始化
*/
__init() {
// 验证方法
this.__initMethods();
// 默认提示信息
this.__initDefaults();
// 默认数据
this.__initData();
}
/**
* 初始化数据
*/
__initData() {
this.form = {};
this.errorList = [];
}
/**
* 初始化默认提示信息
*/
__initDefaults() {
this.defaults = {
messages: {
required: ‘这是必填字段。‘,
email: ‘请输入有效的电子邮件地址。‘,
tel: ‘请输入11位的手机号码。‘,
url: ‘请输入有效的网址。‘,
date: ‘请输入有效的日期。‘,
dateISO: ‘请输入有效的日期（ISO），例如：2009-06-23，1998/01/22。‘,
number: ‘请输入有效的数字。‘,
digits: ‘只能输入数字。‘,
idcard: ‘请输入18位的有效身份证。‘,
equalTo: this.formatTpl(‘输入值必须和 {0} 相同。‘),
contains: this.formatTpl(‘输入值必须包含 {0}。‘),
minlength: this.formatTpl(‘最少要输入 {0} 个字符。‘),
maxlength: this.formatTpl(‘最多可以输入 {0} 个字符。‘),
rangelength: this.formatTpl(‘请输入长度在 {0} 到 {1} 之间的字符。‘),
min: this.formatTpl(‘请输入不小于 {0} 的数值。‘),
max: this.formatTpl(‘请输入不大于 {0} 的数值。‘),
range: this.formatTpl(‘请输入范围在 {0} 到 {1} 之间的数值。‘),
}
}
}
/**
* 初始化默认验证方法
*/
__initMethods() {
const that = this
that.methods = {
/**
* 验证必填元素
*/
required(value, param) {
if (!that.depend(param)) {
return ‘dependency-mismatch‘;
} else if (typeof value === ‘number‘) {
value = value.toString();
} else if (typeof value === ‘boolean‘) {
return !0;
}
return value.length > 0;
},
/**
* 验证电子邮箱格式
*/
email(value) {
return that.optional(value) || /^[a-zA-Z0-9.!#$%&‘*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/.test(value);
},
/**
* 验证手机格式
*/
tel(value) {
return that.optional(value) || /^1[34578]\d{9}$/.test(value);
},
/**
* 验证URL格式
*/
url(value) {
return that.optional(value) || /^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})).?)(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(value);
},
/**
* 验证日期格式
*/
date(value) {
return that.optional(value) || !/Invalid|NaN/.test(new Date(value).toString());
},
/**
* 验证ISO类型的日期格式
*/
dateISO(value) {
return that.optional(value) || /^\d{4}[\/\-](0?[1-9]|1[012])[\/\-](0?[1-9]|[12][0-9]|3[01])$/.test(value);
},
/**
* 验证十进制数字
*/
number(value) {
return that.optional(value) || /^(?:-?\d+|-?\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/.test(value);
},
/**
* 验证整数
*/
digits(value) {
return that.optional(value) || /^\d+$/.test(value);
},
/**
* 验证身份证号码
*/
idcard(value) {
return that.optional(value) || /^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}([0-9]|X)$/.test(value);
},
/**
* 验证两个输入框的内容是否相同
*/
equalTo(value, param) {
return that.optional(value) || value === that.scope.detail.value[param];
},
/**
* 验证是否包含某个值
*/
contains(value, param) {
return that.optional(value) || value.indexOf(param) >= 0;
},
/**
* 验证最小长度
*/
minlength(value, param) {
return that.optional(value) || value.length >= param;
},
/**
* 验证最大长度
*/
maxlength(value, param) {
return that.optional(value) || value.length <= param;
},
/**
* 验证一个长度范围[min, max]
*/
rangelength(value, param) {
return that.optional(value) || (value.length >= param[0] && value.length <= param[1]);
},
/**
* 验证最小值
*/
min(value, param) {
return that.optional(value) || value >= param;
},
/**
* 验证最大值
*/
max(value, param) {
return that.optional(value) || value <= param;
},
/**
* 验证一个值范围[min, max]
*/
range(value, param) {
return that.optional(value) || (value >= param[0] && value <= param[1]);
},
}
}
/**
* 添加自定义验证方法
* @param {String} name 方法名
* @param {Function} method 函数体，接收两个参数(value, param)，value表示元素的值，param表示参数
* @param {String} message 提示信息
*/
addMethod(name, method, message) {
this.methods[name] = method;
this.defaults.messages[name] = message !== undefined ? message : this.defaults.messages[name];
}
/**
* 判断验证方法是否存在
*/
isValidMethod(value) {
let methods = [];
for (let method in this.methods) {
if (method && typeof this.methods[method] === ‘function‘) {
methods.push(method);
}
}
return methods.indexOf(value) !== -1;
}
/**
* 格式化提示信息模板
*/
formatTpl(source, params) {
const that = this;
if (arguments.length === 1) {
return function () {
let args = Array.from(arguments);
args.unshift(source);
return that.formatTpl.apply(this, args);
}
}
if (params === undefined) {
return source;
}
if (arguments.length > 2 && params.constructor !== Array) {
params = Array.from(arguments).slice(1);
}
if (params.constructor !== Array) {
params = [params];
}
params.forEach(function (n, i) {
source = source.replace(new RegExp("\\{" + i + "\\}", "g"), function () {
return n;
});
})
return source;
}
/**
* 判断规则依赖是否存在
*/
depend(param) {
switch (typeof param) {
case ‘boolean‘:
param = param;
break;
case ‘string‘:
param = !!param.length;
break;
case ‘function‘:
param = param();
break;
default:
param = !0;
break;
}
return param;
}
/**
* 判断输入值是否为空
*/
optional(value) {
return !this.methods.required(value) && ‘dependency-mismatch‘;
}
/**
* 获取自定义字段的提示信息
* @param {String} param 字段名
* @param {Object} rule 规则
*/
customMessage(param, rule) {
const params = this.messages[param];
const isObject = typeof params === ‘object‘;
if (params && isObject) return params[rule.method];
}
/**
* 获取某个指定字段的提示信息
* @param {String} param 字段名
* @param {Object} rule 规则
*/
defaultMessage(param, rule) {
let message = this.customMessage(param, rule) || this.defaults.messages[rule.method];
let type = typeof message;
if (type === ‘undefined‘) {
message = `Warning: No message defined for ${rule.method}.`;
} else if (type === ‘function‘) {
message = message.call(this, rule.parameters);
}
return message;
}
/**
* 缓存错误信息
* @param {String} param 字段名
* @param {Object} rule 规则
* @param {String} value 元素的值
*/
formatTplAndAdd(param, rule, value) {
let msg = this.defaultMessage(param, rule);
this.errorList.push({
param: param,
msg: msg,
value: value,
});
}
/**
* 验证某个指定字段的规则
* @param {String} param 字段名
* @param {Object} rules 规则
* @param {Object} event 表单数据对象
*/
checkParam(param, rules, event) {
// 缓存表单数据对象
this.scope = event;
// 缓存字段对应的值
const data = event.detail.value;
const value = data[param] || ‘‘;
// 遍历某个指定字段的所有规则，依次验证规则，否则缓存错误信息
for (let method in rules) {
// 判断验证方法是否存在
if (this.isValidMethod(method)) {
// 缓存规则的属性及值
const rule = {
method: method,
parameters: rules[method]
};
// 调用验证方法
const result = this.methods[method](value, rule.parameters);
// 若result返回值为dependency-mismatch，则说明该字段的值为空或非必填字段
if (result === ‘dependency-mismatch‘) {
continue;
}
this.setValue(param, method, result, value);
// 判断是否通过验证，否则缓存错误信息，跳出循环
if (!result) {
this.formatTplAndAdd(param, rule, value);
break;
}
}
}
}
/**
* 设置字段的默认验证值
* @param {String} param 字段名
*/
setView(param) {
this.form[param] = {
$name: param,
$valid: true,
$invalid: false,
$error: {},
$success: {},
$viewValue: ``,
};
}
/**
* 设置字段的验证值
* @param {String} param 字段名
* @param {String} method 字段的方法
* @param {Boolean} result 是否通过验证
* @param {String} value 字段的值
*/
setValue(param, method, result, value) {
const params = this.form[param];
params.$valid = result;
params.$invalid = !result;
params.$error[method] = !result;
params.$success[method] = result;
params.$viewValue = value;
}
/**
* 验证所有字段的规则，返回验证是否通过
* @param {Object} event 表单数据对象
*/
checkForm(event) {
this.__initData();
for (let param in this.rules) {
this.setView(param);
this.checkParam(param, this.rules[param], event);
}
return this.valid();
}
/**
* 返回验证是否通过
*/
valid() {
return this.size() === 0;
}
/**
* 返回错误信息的个数
*/
size() {
return this.errorList.length;
}
/**
* 返回所有错误信息
*/
validationErrors() {
return this.errorList;
}
}
export default WxValidate;
小程序-表单验证使用