170 lines
3.7 KiB
Vue
170 lines
3.7 KiB
Vue
<template>
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<div class="base-picker">
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<!-- 使用 van-field 作为展示区域 -->
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<van-field
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:modelValue="displayValue"
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:label="label"
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:required="required"
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:placeholder="placeholder"
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:disabled="disabled"
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:readonly="true"
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:right-icon="rightIcon"
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:clickable="!disabled"
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@click="openPicker"
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/>
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<!-- 弹出层选择器 -->
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<van-popup v-model:show="showPicker" position="bottom" round>
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<van-picker
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:modelValue="getPickerValue()"
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:columns="columns"
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:title="pickerTitle"
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:loading="loading"
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show-toolbar
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@confirm="onConfirm"
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@cancel="showPicker = false"
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/>
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</van-popup>
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</div>
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</template>
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<script setup>
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import { ref, computed } from 'vue'
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import { Field, Popup, Picker } from 'vant'
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// Props 定义
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const props = defineProps({
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// 双向绑定值 (v-model)
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modelValue: {
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type: [String, Number, Boolean],
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default: null
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},
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// 选项数据，默认格式 [{ label: '显示名', value: '值' }]
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options: {
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type: Array,
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required: true,
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default: () => []
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},
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// 左侧标签文字
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label: {
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type: String,
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default: ''
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},
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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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// 占位符
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placeholder: {
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type: String,
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default: '请选择'
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},
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// 是否禁用
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disabled: {
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type: Boolean,
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default: false
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},
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// Picker 顶部标题
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pickerTitle: {
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type: String,
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default: '请选择'
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},
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// 加载状态
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loading: {
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type: Boolean,
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default: false
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},
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// 右侧图标（可自定义）
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rightIcon: {
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type: String,
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default: 'arrow-down'
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},
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// 自定义选项的 label 字段名
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labelKey: {
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type: String,
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default: 'label'
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},
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// 自定义选项的 value 字段名
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valueKey: {
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type: String,
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default: 'value'
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}
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})
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// Emits 定义
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const emit = defineEmits(['update:modelValue', 'change'])
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// 控制弹出层显示
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const showPicker = ref(false)
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const getPickerValue = () => {
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// 布尔值需要转换为数字交给picker, 在设置的时候，又需要转换回来
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if(props.modelValue === true) return [1]
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if(props.modelValue === false) return [0]
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return [props.modelValue]
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}
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// 处理 Picker 数据格式：将 options 转为 Picker 需要的文本数组
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const columns = computed(() => {
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return props.options.map(item => {
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let value = item[props.valueKey]
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let isBoolean = false
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// vant不支持布尔值，需要做转换
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if(value === true) {
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value = 1
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isBoolean = true
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}
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if(value === false) {
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value = 0
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isBoolean = true
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}
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return {
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text: item[props.labelKey],
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value,
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isBoolean
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}
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})
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})
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// 根据选中的值，获取显示文本
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const displayValue = computed(() => {
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if (props.modelValue === null || props.modelValue === undefined || props.modelValue === '') {
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return ''
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}
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const selected = props.options.find(item => item[props.valueKey] === props.modelValue)
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return selected ? selected[props.labelKey] : ''
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})
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// 打开选择器
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const openPicker = () => {
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if (!props.disabled) {
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showPicker.value = true
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}
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}
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// 确认选择
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const onConfirm = ({ selectedValues, selectedOptions }) => {
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let value = selectedOptions[0][props.valueKey]
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// 如果是布尔值，需要转换为布尔值
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if(selectedOptions[0].isBoolean) {
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value = value === 1 ? true : false
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}
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const label = selectedOptions[0][props.labelKey]
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emit('update:modelValue', value)
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emit('change', { value, label })
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showPicker.value = false
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}
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</script>
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<style scoped>
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.base-picker {
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width: 100%;
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}
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/* 可选：调整 Field 的只读样式 */
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:deep(.van-field__control--readonly) {
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cursor: pointer;
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}
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</style>
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