339 lines
9.0 KiB
Vue
339 lines
9.0 KiB
Vue
<template>
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<view class="u-form-item" :class="{'u-border-bottom': borderBottom, 'u-form-item__border-bottom--error': validateState === 'error' && showError('border-bottom')}">
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<view class="u-form-item__body" :style="{
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flexDirection: labelPosition == 'left' ? 'row' : 'column'
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}">
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<view class="u-form-item--left" :style="{
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width: labelPosition == 'left' ? labelWidth + 'rpx' : '100%',
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flex: `0 0 ${labelPosition == 'left' ? labelWidth + 'rpx' : '100%'}`,
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marginBottom: labelPosition == 'left' ? 0 : '10rpx',
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}">
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<!-- 为了块对齐 -->
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<view class="u-form-item--left__content">
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<!-- nvue不支持伪元素before -->
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<text v-if="isRequired" class="u-form-item--left__content--required">*</text>
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<view class="u-form-item--left__content__icon" v-if="leftIcon">
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<u-icon :name="leftIcon" :custom-style="leftIconStyle"></u-icon>
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</view>
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<view class="u-form-item--left__content__label" :style="[labelStyle, {
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'justify-content': labelAlign == 'left' ? 'flex-star' : labelAlign == 'center' ? 'center' : 'flex-end'
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}]">
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{{label}}
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</view>
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</view>
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</view>
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<view class="u-form-item--right u-flex">
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<view class="u-form-item--right__content">
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<view class="u-form-item--right__content__slot ">
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<slot />
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</view>
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<view class="u-form-item--right__content__icon u-flex" v-if="$slots.right || rightIcon">
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<u-icon :custom-style="rightIconStyle" v-if="rightIcon" :name="rightIcon"></u-icon>
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<slot name="right" />
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</view>
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</view>
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</view>
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</view>
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<view class="u-form-item__message" v-if="validateState === 'error' && showError('message')" :style="{
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paddingLeft: labelPosition == 'left' ? `${labelWidth}rpx` : '0',
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}">{{validateMessage}}</view>
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</view>
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</template>
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<script>
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import Emitter from '../../libs/util/emitter.js';
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import schema from '../../libs/util/async-validator';
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// 去除警告信息
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schema.warning = function(){};
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export default {
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name: 'u-form-item',
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mixins: [Emitter],
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inject: {
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uForm: {
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default() {
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return null
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}
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}
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},
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props: {
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// input的label提示语
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label: {
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type: String,
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default: ''
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},
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// 绑定的值
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prop: {
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type: String,
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default: ''
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},
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// 是否显示表单域的下划线边框
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borderBottom: {
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type: Boolean,
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default: true
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},
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// label的位置，left-左边，top-上边
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labelPosition: {
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type: String,
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default: 'left'
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},
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// label的宽度，单位rpx
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labelWidth: {
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type: [String, Number],
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default: 90
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},
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// lable的样式，对象形式
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labelStyle: {
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type: Object,
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default() {
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return {}
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}
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},
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// lable字体的对齐方式
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labelAlign: {
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type: String,
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default: 'left'
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},
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// 右侧图标
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rightIcon: {
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type: String,
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default: ''
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},
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// 左侧图标
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leftIcon: {
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type: String,
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default: ''
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},
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// 左侧图标的样式
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leftIconStyle: {
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type: Object,
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default() {
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return {}
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}
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},
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// 左侧图标的样式
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rightIconStyle: {
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type: Object,
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default() {
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return {}
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}
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}
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},
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data() {
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return {
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initialValue: '', // 存储的默认值
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isRequired: false, // 是否必填
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validateState: '', // 是否校验成功
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validateMessage: '' ,// 校验失败的提示语
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// 有错误时的提示方式，message-提示信息，border-如果input设置了边框，变成呈红色，
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// border-bottom-下边框呈现红色，none-无提示
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errorType: ['message']
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};
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},
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watch: {
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validateState(val) {
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this.broadcastInputError();
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},
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// 监听u-form组件的errorType的变化
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"uForm.errorType"(val) {
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this.errorType = val;
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this.broadcastInputError();
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}
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},
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computed: {
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fieldValue() {
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return this.uForm.model[this.prop];
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},
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showError() {
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return type => {
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// 如果errorType数组中含有none，就不提示错误信息
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if(this.errorType.indexOf('none') >= 0) return false;
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else if(this.errorType.indexOf(type) >= 0) return true;
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else return false;
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}
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}
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},
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methods: {
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broadcastInputError() {
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// 子组件发出事件，第三个参数为true或者false，true代表有错误
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this.broadcast('u-input', 'on-form-item-error', this.validateState === 'error' && this.showError('border'));
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},
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// 判断是否需要required校验
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setRules() {
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let that = this;
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// 从父组件u-form拿到当前u-form-item需要验证 的规则
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let rules = this.getRules();
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if (rules.length) {
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this.isRequired = rules.some(rule => {
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// 如果有必填项，就返回，没有的话，就是undefined
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return rule.required;
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});
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}
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// blur事件
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this.$on('on-form-blur', that.onFieldBlur);
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// change事件
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this.$on('on-form-change', that.onFieldChange);
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},
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// 从u-form的rules属性中，取出当前u-form-item的校验规则
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getRules() {
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// 父组件的所有规则
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let rules = this.uForm.rules;
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rules = rules ? rules[this.prop] : [];
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// 保证返回的是一个数组形式
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return [].concat(rules || []);
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},
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// blur事件时进行表单校验
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onFieldBlur() {
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this.validation('blur');
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},
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// change事件进行表单校验
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onFieldChange() {
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this.validation('change');
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},
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// 过滤出符合要求的rule规则
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getFilteredRule(triggerType = '') {
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let rules = this.getRules();
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// 整体验证表单时，triggerType为空字符串，此时返回所有规则进行验证
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if(!triggerType) return rules;
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// 历遍判断规则是否有对应的事件，比如blur，change触发等的事件
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// return rules.filter(res => res.trigger == triggerType);
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// 使用indexOf判断，是因为某些时候设置的验证规则的trigger属性可能为多个，比如"blur,change"
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return rules.filter(res => !res.trigger || res.trigger.indexOf(triggerType) !== -1);
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},
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// 校验数据
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validation(trigger, callback = () => {}) {
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// blur和change是否有当前方式的校验规则
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let rules = this.getFilteredRule(trigger);
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// 判断是否有验证规则，如果没有规则，也调用回调方法，否则父组件u-form会因为
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// 对count变量的统计错误而无法进入上一层的回调
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if (!rules || rules.length === 0) {
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return callback('');
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}
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// 设置当前的装填，标识为校验中
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this.validateState = 'validating';
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// 调用async-validator的方法
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let validator = new schema({ [this.prop]: rules });
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validator.validate({ [this.prop]: this.fieldValue }, { firstFields: true }, (errors, fields) => {
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// 记录状态和报错信息
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this.validateState = !errors ? 'success' : 'error';
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this.validateMessage = errors ? errors[0].message : '';
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// 调用回调方法
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callback(this.validateMessage);
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});
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},
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// 清空当前的u-form-item
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resetField() {
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this.uForm.model[this.prop] = this.initialValue;
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// 设置为`success`状态，只是为了清空错误标记
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this.validateState = 'success';
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}
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},
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// 组件创建完成时，将当前实例保存到u-form中
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mounted() {
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// 如果没有传入prop，或者uForm为空(如果u-form-input单独使用，就不会有uForm注入)，就不进行校验
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if (!this.prop || this.uForm === null) return;
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// 发出事件，让父组件将本实例加入到管理数组中
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this.dispatch('u-form', 'on-form-item-add', this);
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this.errorType = this.uForm.errorType;
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// 设置初始值
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this.initialValue = this.fieldValue;
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// 添加表单校验
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this.setRules();
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},
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// 组件销毁前，将实例从 Form 的缓存中移除
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beforeDestroy() {
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this.dispatch('u-form', 'on-form-item-remove', this);
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}
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};
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</script>
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<style lang="scss" scoped>
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.u-form-item {
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display: flex;
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// align-items: flex-start;
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padding: 20rpx 0;
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font-size: 28rpx;
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color: $u-main-color;
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box-sizing: border-box;
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line-height: $u-form-item-height;
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flex-direction: column;
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&__border-bottom--error:after {
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border-color: $u-type-error;
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}
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&__body {
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display: flex;
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}
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&--left {
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display: flex;
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align-items: center;
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&__content {
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position: relative;
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display: flex;
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align-items: center;
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padding-right: 10rpx;
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flex: 1;
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&__icon {
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margin-right: 8rpx;
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}
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&--required {
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position: absolute;
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left: -16rpx;
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vertical-align: middle;
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color: $u-type-error;
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padding-top: 6rpx;
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}
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&__label {
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display: flex;
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align-items: center;
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flex: 1;
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}
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}
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}
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&--right {
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flex: 1;
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&__content {
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display: flex;
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align-items: center;
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flex: 1;
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&__slot {
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flex: 1;
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/* #ifndef MP */
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display: flex;
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align-items: center;
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/* #endif */
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}
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&__icon {
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margin-left: 10rpx;
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}
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}
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}
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&__message {
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font-size: 24rpx;
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line-height: 24rpx;
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color: $u-type-error;
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margin-top: 12rpx;
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}
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}
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</style>
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