<template>
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<view class="u-form-item">
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<view
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class="u-form-item__body"
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@tap="clickHandler"
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:style="[$u.addStyle(customStyle), {
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flexDirection: (labelPosition || parentData.labelPosition) === 'left' ? 'row' : 'column'
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}]"
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>
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<!-- 微信小程序中，将一个参数设置空字符串，结果会变成字符串"true" -->
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<slot name="label">
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<!-- {{required}} -->
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<view
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class="u-form-item__body__left"
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v-if="required || leftIcon || label"
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:style="{
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width: $u.addUnit(labelWidth || parentData.labelWidth),
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marginBottom: parentData.labelPosition === 'left' ? 0 : '5px',
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}"
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>
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<!-- 为了块对齐 -->
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<view class="u-form-item__body__left__content">
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<!-- nvue不支持伪元素before -->
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<text
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v-if="required"
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class="u-form-item__body__left__content__required"
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>*</text>
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<view
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class="u-form-item__body__left__content__icon"
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v-if="leftIcon"
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>
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<u-icon
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:name="leftIcon"
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:custom-style="leftIconStyle"
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></u-icon>
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</view>
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<text
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class="u-form-item__body__left__content__label"
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:style="[parentData.labelStyle, {
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justifyContent: parentData.labelAlign === 'left' ? 'flex-start' : parentData.labelAlign === 'center' ? 'center' : 'flex-end'
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}]"
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>{{ label }}</text>
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</view>
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</view>
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</slot>
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<view class="u-form-item__body__right">
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<view class="u-form-item__body__right__content">
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<view class="u-form-item__body__right__content__slot">
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<slot />
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</view>
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<view
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class="item__body__right__content__icon"
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v-if="$slots.right"
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>
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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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<slot name="error" v-bind:message="message">
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<text
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v-if="!!message && parentData.errorType === 'message'"
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class="u-form-item__body__right__message"
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:style="{
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marginLeft: $u.addUnit(parentData.labelPosition === 'top' ? 0 : (labelWidth || parentData.labelWidth))
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}"
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>{{ message }}</text>
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</slot>
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<u-line
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v-if="borderBottom"
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:color="message && parentData.errorType === 'border-bottom' ? $u.color.error : propsLine.color"
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:customStyle="`margin-top: ${message && parentData.errorType === 'message' ? '5px' : 0}`"
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></u-line>
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</view>
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</template>
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<script>
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import props from './props.js';
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/**
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* Form 表单
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* @description 此组件一般用于表单场景，可以配置Input输入框，Select弹出框，进行表单验证等。
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* @tutorial https://www.uviewui.com/components/form.html
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* @property {String} label input的label提示语
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* @property {String} prop 绑定的值
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* @property {String | Boolean} borderBottom 是否显示表单域的下划线边框
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* @property {String | Number} labelWidth label的宽度，单位px
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* @property {String} rightIcon 右侧图标
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* @property {String} leftIcon 左侧图标
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* @property {String | Object} leftIconStyle 左侧图标的样式
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* @property {Boolean} required 是否显示左边的必填星号，只作显示用，具体校验必填的逻辑，请在rules中配置 (默认 false )
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*
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* @example <u-form-item label="姓名" prop="userInfo.name" borderBottom ref="item1"></u-form-item>
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*/
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export default {
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name: 'u-form-item',
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mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
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data() {
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return {
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// 错误提示语
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message: '',
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parentData: {
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// 提示文本的位置
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labelPosition: 'left',
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// 提示文本对齐方式
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labelAlign: 'left',
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// 提示文本的样式
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labelStyle: {},
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// 提示文本的宽度
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labelWidth: 45,
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// 错误提示方式
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errorType: 'message'
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}
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}
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},
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// 组件创建完成时，将当前实例保存到u-form中
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computed: {
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propsLine() {
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return uni.$u.props.line
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}
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},
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mounted() {
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this.init()
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},
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methods: {
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init() {
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// 父组件的实例
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this.updateParentData()
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if (!this.parent) {
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uni.$u.error('u-form-item需要结合u-form组件使用')
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}
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},
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// 获取父组件的参数
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updateParentData() {
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// 此方法写在mixin中
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this.getParentData('u-form');
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},
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// 移除u-form-item的校验结果
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clearValidate() {
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this.message = null
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},
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// 清空当前的组件的校验结果，并重置为初始值
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resetField() {
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// 找到原始值
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const value = uni.$u.getProperty(this.parent.originalModel, this.prop)
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// 将u-form的model的prop属性链还原原始值
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uni.$u.setProperty(this.parent.model, this.prop, value)
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// 移除校验结果
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this.message = null
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},
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// 点击组件
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clickHandler() {
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this.$emit('click')
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}
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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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@import "../../libs/css/components.scss";
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.u-form-item {
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@include flex(column);
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font-size: 14px;
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color: $u-main-color;
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&__body {
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@include flex;
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padding: 10px 0;
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&__left {
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@include flex;
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align-items: center;
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&__content {
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position: relative;
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@include 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: -9px;
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color: $u-error;
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line-height: 20px;
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font-size: 20px;
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top: 3px;
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}
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&__label {
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@include flex;
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align-items: center;
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flex: 1;
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color: $u-main-color;
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font-size: 15px;
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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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@include 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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@include 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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color: $u-light-color;
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font-size: 30rpx;
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}
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}
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&__message {
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font-size: 12px;
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line-height: 12px;
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color: $u-error;
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}
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}
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}
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}
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</style>
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