458 lines
14 KiB
Vue
458 lines
14 KiB
Vue
<template>
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<view
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class="tn-form-item-class tn-form-item"
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:class="{
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'tn-border-solid-bottom': elBorderBottom,
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'tn-form-item__border-bottom--error': validateState === 'error' && showError('border-bottom')
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}"
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>
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<view
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class="tn-form-item__body"
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:style="{
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flexDirection: elLabelPosition == 'left' ? 'row' : 'column'
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}"
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>
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<!-- 处理微信小程序中设置属性的问题，不设置值的时候会变成true -->
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<view
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class="tn-form-item--left"
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:style="{
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width: wLabelWidth,
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flex: `0 0 ${wLabelWidth}`,
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marginBottom: elLabelPosition == 'left' ? 0 : '10rpx'
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}"
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>
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<!-- 块对齐 -->
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<view v-if="required || leftIcon || label" class="tn-form-item--left__content"
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:style="[leftContentStyle]"
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>
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<!-- nvue不支持伪元素before -->
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<view v-if="leftIcon" class="tn-form-item--left__content__icon">
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<view :class="[`tn-icon-${leftIcon}`]" :style="leftIconStyle"></view>
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</view>
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<!-- <view
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class="tn-form-item--left__content__label"
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:style="[elLabelStyle, {
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'justify-content': elLabelAlign === 'left' ? 'flex-satrt' : elLabelAlign === 'center' ? 'center' : 'flex-end'
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}]"
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>
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{{label}}
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</view> -->
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<view
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class="tn-form-item--left__content__label"
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:style="[elLabelStyle]"
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>
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{{label}}
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</view>
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<text v-if="required" class="tn-form-item--left__content--required">*</text>
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</view>
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</view>
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<view class="tn-form-item--right tn-flex">
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<view class="tn-form-item--right__content">
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<view class="tn-form-item--right__content__slot">
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<slot></slot>
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</view>
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<view v-if="$slots.right || rightIcon" class="tn-form-item--right__content__icon tn-flex">
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<view v-if="rightIcon" :class="[`tn-icon-${rightIcon}`]" :style="rightIconStyle"></view>
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<slot name="right"></slot>
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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
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v-if="validateState === 'error' && showError('message')"
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class="tn-form-item__message"
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:style="{
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paddingLeft: elLabelPosition === 'left' ? elLabelWidth + 'rpx' : '0'
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}"
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>
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{{validateMessage}}
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</view>
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</view>
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</template>
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<script>
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import Emitter from '../../libs/utils/emitter.js'
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import schema from '../../libs/utils/async-validator.js'
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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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mixins: [Emitter],
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name: 'tn-form-item',
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inject: {
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tnForm: {
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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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// 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(标签名称)的位置
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// left - 左边
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// top - 上边
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labelPosition: {
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type: String,
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default: ''
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},
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// label的宽度
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labelWidth: {
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type: Number,
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default: 0
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},
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// label的对齐方式
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// left - 左对齐
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// top - 上对齐
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// right - 右对齐
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// bottom - 下对齐
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labelAlign: {
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type: String,
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default: ''
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},
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// label 的样式
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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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// 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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// 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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// 右侧图标样式
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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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// 是否显示必填项的*，不做校验用途
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required: {
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type: Boolean,
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default: false
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}
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},
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computed: {
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// 处理微信小程序label的宽度
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wLabelWidth() {
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// 如果用户设置label为空字符串(微信小程序空字符串最终会变成字符串的'true')，意味着要将label的位置宽度设置为auto
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return this.elLabelPosition === 'left' ? (this.label === 'true' || this.label === '' ? 'auto' : this.elLabelWidth + 'rpx') : '100%'
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},
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// 是否显示错误提示
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showError() {
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return type => {
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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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// label的宽度(默认值为90)
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elLabelWidth() {
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return this.labelWidth != 0 ? this.labelWidth : (this.parentData.labelWidth != 0 ? this.parentData.labelWidth : 90)
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},
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// label的样式
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elLabelStyle() {
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return Object.keys(this.labelStyle).length ? this.labelStyle : (Object.keys(this.parentData.labelStyle).length ? this.parentData.labelStyle : {})
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},
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// label显示位置
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elLabelPosition() {
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return this.labelPosition ? this.labelPosition : (this.parentData.labelPosition ? this.parentData.labelPosition : 'left')
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},
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// label对齐方式
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elLabelAlign() {
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return this.labelAlign ? this.labelAlign : (this.parentData.labelAlign ? this.parentData.labelAlign : 'left')
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},
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// label下划线
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elBorderBottom() {
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return this.borderBottom !== '' ? this.borderBottom : (this.parentData.borderBottom !== '' ? this.parentData.borderBottom : true)
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},
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leftContentStyle() {
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let style = {}
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if (this.elLabelPosition === 'left') {
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switch(this.elLabelAlign) {
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case 'left':
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style.justifyContent = 'flex-start'
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break
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case 'center':
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style.justifyContent = 'center'
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break
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default:
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style.justifyContent = 'flex-end'
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break
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}
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}
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return style
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}
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},
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data() {
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return {
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// 默认值
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initialValue: '',
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// 是否校验成功
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validateState: '',
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// 校验失败提示信息
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validateMessage: '',
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// 错误的提示方式（参考form组件）
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errorType: ['message'],
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// 当前子组件输入的值
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fieldValue: '',
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// 父组件的参数
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// 由于再computed中无法得知this.parent的变化，所以放在data中
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parentData: {
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borderBottom: true,
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labelWidth: 90,
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labelPosition: 'left',
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labelAlign: 'left',
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labelStyle: {},
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}
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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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"tnForm.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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mounted() {
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// 组件创建完成后，保存当前实例到form组件中
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// 支付宝、头条小程序不支持provide/inject，所以使用这个方法获取整个父组件，在created定义，避免循环应用\
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this.parent = this.$tn.$parent.call(this, 'tn-form')
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if (this.parent) {
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// 遍历parentData属性，将parent中同名的属性赋值给parentData
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Object.keys(this.parentData).map(key => {
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this.parentData[key] = this.parent[key]
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})
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// 如果没有传入prop或者tnForm为空（单独使用form-item组件的时候），就不进行校验
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if (this.prop) {
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// 将本实例添加到父组件中
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this.parent.fields.push(this)
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this.errorType = this.parent.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，这里必须要写在$nextTick中，因为tn-form的rules是通过ref手动传入的
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// 不在$nextTick中的话，可能会造成执行此处代码时，父组件还没通过ref把规则给tn-form，导致规则为空
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this.$nextTick(() => {
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this.setRules()
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})
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}
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}
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},
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beforeDestroy() {
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// 组件销毁前，将实例从tn-form的缓存中移除
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// 如果当前没有prop的话表示当前不进行删除
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if (this.parent && this.prop) {
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this.parent.fields.map((item, index) => {
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if (item === this) this.parent.fields.splice(index, 1)
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})
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}
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},
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methods: {
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// 向input组件发出错误事件
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broadcastInputError() {
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this.broadcast('tn-input', 'on-form-item-error', this.validateState === 'error' && this.showError('border'))
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},
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// 设置校验规则
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setRules() {
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let that = this
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// 从父组件tn-form拿到当前tn-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form的rules属性中取出当前form-item的校验规则
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getRules() {
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let rules = this.parent.rules
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rules = rules ? rules[this.prop] : []
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// 返回数值形式的值
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return [].concat(rules || [])
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},
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// blur事件时进行表单认证
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onFieldBlur() {
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this.validation('blur')
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},
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// change事件时进行表单认证
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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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getFilterRule(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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// 某些场景可能的判断规则，可能不存在trigger属性，故先判断是否存在此属性
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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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// 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(rule => rule.trigger && rule.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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// 校验之前先获取需要校验的值
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this.fieldValue = this.parent.model[this.prop]
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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.getFilterRule(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tn-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({
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[this.prop]: rules
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})
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validator.validate({
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[this.prop]: this.fieldValue
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}, {
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firstFields: true
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}, (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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callback(this.validateMessage)
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})
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},
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// 清空当前item信息
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resetField() {
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this.parent.model[this.prop] = this.initialValue
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// 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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}
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</script>
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<style lang="scss" scoped>
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.tn-form-item {
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display: flex;
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flex-direction: column;
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padding: 20rpx 0;
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font-size: 28rpx;
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color: $tn-font-color;
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box-sizing: border-box;
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line-height: $tn-form-item-height;
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&__border-bottom--error:after {
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border-color: $tn-color-red;
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}
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&__body {
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display: flex;
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flex-direction: row;
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}
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&--left {
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display: flex;
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flex-direction: row;
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align-items: center;
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&__content {
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display: flex;
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flex-direction: row;
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position: relative;
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align-items: center;
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padding-right: 18rpx;
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flex: 1;
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&--required {
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position: relative;
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right: 0;
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vertical-align: middle;
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color: $tn-color-red;
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}
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&__icon {
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color: $tn-font-sub-color;
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margin-right: 8rpx;
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}
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&__label {
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// display: flex;
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// flex-direction: row;
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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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flex-direction: row;
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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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flex-direction: row;
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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: $tn-font-sub-color;
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font-size: 30rpx;
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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: $tn-color-red;
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margin-top: 12rpx;
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}
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}
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</style>
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