441 lines
17 KiB
Vue
441 lines
17 KiB
Vue
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<template>
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<view class="u-select" :class="customClass" :style="$u.toStyle(customStyle)">
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<!-- <view class="u-select__action" :class="{
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'u-select--border': border
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}" @tap.stop="selectHandler">
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<view class="u-select__action__icon" :class="{
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'u-select__action__icon--reverse': value == true
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}">
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<u-icon name="arrow-down-fill" size="26" color="var(--u-light-color)"></u-icon>
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</view>
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</view> -->
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<u-popup
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:maskCloseAble="maskCloseAble"
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mode="bottom"
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:popup="false"
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v-model="popupValue"
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length="auto"
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:safeAreaInsetBottom="safeAreaInsetBottom"
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@close="close"
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:z-index="uZIndex"
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>
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<view class="u-select">
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<view class="u-select__header" @touchmove.stop.prevent="">
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<view
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class="u-select__header__cancel u-select__header__btn"
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:style="{ color: cancelColor }"
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hover-class="u-hover-class"
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:hover-stay-time="150"
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@tap="getResult('cancel')"
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>
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{{ cancelText }}
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</view>
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<view class="u-select__header__title u-line-1"> {{ title }}</view>
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<view
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class="u-select__header__confirm u-select__header__btn"
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:style="{ color: moving ? cancelColor : confirmColor }"
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hover-class="u-hover-class"
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:hover-stay-time="150"
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@touchmove.stop=""
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@tap.stop="getResult('confirm')"
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>
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{{ confirmText }}
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</view>
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</view>
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<view class="u-select__body">
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<picker-view
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v-if="modelValue && readyToRender"
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:value="defaultSelector"
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class="u-select__body__picker-view"
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mask-class="u-picker-view-mask"
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indicator-class="u-picker-view-indicator"
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@pickstart="pickstart"
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@pickend="pickend"
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@change="columnChange"
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>
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<picker-view-column v-for="(item, index) in columnData" :key="index">
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<view
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class="u-select__body__picker-view__item"
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v-for="(item1, index1) in item"
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:key="index1"
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>
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<view class="u-line-1">{{ item1[labelName] }}</view>
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</view>
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</picker-view-column>
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</picker-view>
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</view>
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</view>
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</u-popup>
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</view>
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</template>
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<script lang="ts">
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export default {
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name: 'u-select',
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options: {
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addGlobalClass: true,
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// #ifndef MP-TOUTIAO
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virtualHost: true,
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// #endif
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styleIsolation: 'shared'
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}
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};
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</script>
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<script setup lang="ts">
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import { ref, computed, watch, nextTick } from 'vue';
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import { SelectProps } from './types';
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import type { SelectListItem } from '../../types/global';
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import { $u } from '../..';
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/**
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* select 列选择器
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* @description 此选择器用于单列，多列，多列联动的选择场景。(从1.3.0版本起，不建议使用Picker组件的单列和多列模式，Select组件是专门为列选择而构造的组件，更简单易用。)
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* @tutorial https://uviewpro.cn/zh/components/select.html
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* @property {String} mode 模式选择，"single-column"-单列模式，"mutil-column"-多列模式，"mutil-column-auto"-多列联动模式
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* @property {Array} list 列数据，数组形式，见官网说明
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* @property {Boolean} v-model 布尔值变量，用于控制选择器的弹出与收起
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* @property {Boolean} safe-area-inset-bottom 是否开启底部安全区适配(默认false)
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* @property {String} cancel-color 取消按钮的颜色（默认var(--u-content-color)）
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* @property {String} confirm-color 确认按钮的颜色(默认主题色primary)
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* @property {String} confirm-text 确认按钮的文字
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* @property {String} cancel-text 取消按钮的文字
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* @property {String} default-value 提供的默认选中的下标，见官网说明
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* @property {Boolean} mask-close-able 是否允许通过点击遮罩关闭Picker(默认true)
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* @property {String Number} z-index 弹出时的z-index值(默认10075)
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* @property {String} value-name 自定义list数据的value属性名 1.3.6
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* @property {String} label-name 自定义list数据的label属性名 1.3.6
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* @property {String} child-name 自定义list数据的children属性名，只对多列联动模式有效 1.3.7
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* @event {Function} confirm 点击确定按钮，返回当前选择的值
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* @example <u-select v-model="show" :list="list"></u-select>
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*/
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const props = defineProps(SelectProps);
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const emit = defineEmits(['update:modelValue', 'confirm', 'cancel', 'click']);
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// 用于列改变时，保存当前的索引，下一次变化时比较得出是哪一列发生了变化
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const defaultSelector = ref<number[]>([0]);
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// picker-view的数据
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const columnData = ref<SelectListItem[][]>([]);
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// 控制 picker 是否渲染（等待初始化完成）
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const readyToRender = ref(false);
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// 保存用户上次确认的索引，如果用户未确认过，则为 null，首次打开会使用 props.defaultValue
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const savedSelector = ref<number[] | null>(
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props.defaultValue && props.defaultValue.length ? props.defaultValue.slice() : null
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);
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// 每次队列发生变化时，保存选择的结果
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const selectValue = ref<SelectListItem[]>([]);
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// 上一次列变化时的index
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const lastSelectIndex = ref<number[]>([]);
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// 列数
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const columnNum = ref(0);
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// 列是否还在滑动中，微信小程序如果在滑动中就点确定，结果可能不准确
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const moving = ref(false);
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// 如果用户有传递z-index值，优先使用
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const uZIndex = computed(() => (props.zIndex ? props.zIndex : $u.zIndex.popup));
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const popupValue = computed({
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get: () => props.modelValue,
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set: (val: boolean) => emit('update:modelValue', val)
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});
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watch(
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() => props.modelValue,
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async val => {
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if (val) {
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// 等待一次 DOM 更新
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await nextTick();
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// 在 App（APP-PLUS）平台上，原生 picker 可能需要更长时间初始化
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// 我们先执行 init，并在 init 完成后将 readyToRender 置为 true，保证 picker 在数据就绪后渲染
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// #ifdef APP-PLUS
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await new Promise(resolve => setTimeout(resolve, 20));
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// #endif
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init();
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readyToRender.value = true;
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} else {
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// 关闭弹窗时复位
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readyToRender.value = false;
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}
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},
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{ immediate: true }
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);
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// 标识滑动开始，只有微信小程序才有这样的事件
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function pickstart() {
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// #ifdef MP-WEIXIN
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moving.value = true;
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// #endif
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}
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function pickend() {
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// #ifdef MP-WEIXIN
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moving.value = false;
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// #endif
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}
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function init() {
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// 先计算列数
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setColumnNum();
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// 根据 columnData 和 columnNum 设置默认选中
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setDefaultSelector();
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// 准备列数据（部分模式需要依赖 defaultSelector 的值，但我们将先生成columnData的结构）
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setColumnData();
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// 清空并设置 selectValue
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selectValue.value = [];
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setSelectValue();
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}
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// 获取默认选中列下标
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function setDefaultSelector() {
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// 根据 preserveSelection 决定优先级：
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// - 如果 preserveSelection 为 true（默认），优先使用用户已确认的选择 savedSelector（如果存在），否则使用 props.defaultValue
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// - 如果 preserveSelection 为 false，则优先使用外部 props.defaultValue（如果存在），否则使用 savedSelector
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let useDefault: number[] | null = null;
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if (props.preserveSelection) {
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useDefault = savedSelector.value && savedSelector.value.length ? savedSelector.value : props.defaultValue;
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} else {
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useDefault = props.defaultValue && props.defaultValue.length ? props.defaultValue : savedSelector.value;
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}
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// 如果没有传入默认选中的值，生成长度为 columnNum，用0填充的数组
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defaultSelector.value =
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useDefault && useDefault.length == columnNum.value ? useDefault.slice() : Array(columnNum.value).fill(0);
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lastSelectIndex.value = [...defaultSelector.value];
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}
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// 计算列数
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function setColumnNum() {
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// 单列的列数为1
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if (props.mode == 'single-column') columnNum.value = 1;
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// 多列时，this.list数组长度就是列数
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else if (props.mode == 'mutil-column') columnNum.value = props.list.length;
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// 多列联动时，通过历遍this.list的第一个元素，得出有多少列
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else if (props.mode == 'mutil-column-auto') {
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let num = 1;
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let column: any = props.list;
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// 只要有元素并且第一个元素有children属性，继续遍历
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while (Array.isArray(column) && column[0] && typeof column[0] === 'object' && props.childName in column[0]) {
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column = column[0][props.childName];
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num++;
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}
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columnNum.value = num;
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}
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}
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// 获取需要展示在picker中的列数据
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function setColumnData() {
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let data: SelectListItem[][] = [];
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selectValue.value = [];
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if (props.mode == 'mutil-column-auto') {
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// 获得所有数据中的第一个元素
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let column: any = props.list[defaultSelector.value.length ? defaultSelector.value[0] : 0];
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// 通过循环所有的列数，再根据设定列的数组，得出当前需要渲染的整个列数组
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for (let i = 0; i < columnNum.value; i++) {
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// 第一列默认为整个list数组
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if (i == 0) {
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data[i] = is2DList(props.list) ? props.list[i] || [] : (props.list as SelectListItem[]);
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column = column && typeof column === 'object' ? column[props.childName] : [];
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} else {
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// 大于第一列时，判断是否有默认选中的，如果没有就用该列的第一项
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data[i] = Array.isArray(column) ? column : [];
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column =
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Array.isArray(column) &&
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column[defaultSelector.value[i]] &&
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typeof column[defaultSelector.value[i]] === 'object'
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? column[defaultSelector.value[i]][props.childName]
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: [];
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}
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}
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} else if (props.mode == 'single-column') {
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data[0] = Array.isArray(props.list) && !is2DList(props.list) ? (props.list as SelectListItem[]) : [];
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} else if (props.mode == 'mutil-column') {
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data = is2DList(props.list) ? props.list : [props.list as SelectListItem[]];
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}
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columnData.value = data;
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}
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// 获取默认选中的值，如果没有设置defaultValue，就默认选中每列的第一个
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function setSelectValue() {
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for (let i = 0; i < columnNum.value; i++) {
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const tmp = columnData.value[i][defaultSelector.value[i]];
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let data: any = {
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value: tmp ? tmp[props.valueName] : null,
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label: tmp ? tmp[props.labelName] : null
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};
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// 判断是否存在额外的参数，如果存在，就返回
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if (tmp && tmp.extra !== undefined) data.extra = tmp.extra;
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selectValue.value.push(data);
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}
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}
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// 列选项
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function columnChange(e: any) {
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let index: number = -1;
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const columnIndex = e.detail.value;
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// 由于后面是需要push进数组的，所以需要先清空数组
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selectValue.value = [];
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defaultSelector.value = columnIndex;
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if (props.mode == 'mutil-column-auto') {
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// 对比前后两个数组，寻找变更的是哪一列，如果某一个元素不同，即可判定该列发生了变化
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lastSelectIndex.value.map((val, idx) => {
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if (val != columnIndex[idx]) index = idx;
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});
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for (let i = index + 1; i < columnNum.value; i++) {
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// 当前变化列的下一列的数据，需要获取上一列的数据，同时需要指定是上一列的第几个的children，再往后的
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// 默认是队列的第一个为默认选项
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const prevCol = columnData.value[i - 1];
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const prevIdx = i - 1 == index ? columnIndex[index] : 0;
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columnData.value[i] =
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Array.isArray(prevCol) && prevCol[prevIdx] && typeof prevCol[prevIdx] === 'object'
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? prevCol[prevIdx][props.childName]
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: [];
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// 改变的列之后的所有列，默认选中第一个
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defaultSelector.value[i] = 0;
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}
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// 在历遍的过程中，可能由于上一步修改this.columnData，导致产生连锁反应，程序触发columnChange，会有多次调用
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// 只有在最后一次数据稳定后的结果是正确的，此前的历遍中，可能会产生undefined，故需要判断
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columnIndex.map((item: any, idx: number) => {
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let data = columnData.value[idx][columnIndex[idx]];
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let tmp: any = {
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value: data ? data[props.valueName] : null,
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label: data ? data[props.labelName] : null
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};
|
|||
|
|
// 判断是否有需要额外携带的参数
|
|||
|
|
if (data && data.extra !== undefined) tmp.extra = data.extra;
|
|||
|
|
selectValue.value.push(tmp);
|
|||
|
|
});
|
|||
|
|
// 保存这一次的结果，用于下次列发生变化时作比较
|
|||
|
|
lastSelectIndex.value = [...columnIndex];
|
|||
|
|
} else if (props.mode == 'single-column') {
|
|||
|
|
let data = columnData.value[0][columnIndex[0]];
|
|||
|
|
// 初始默认选中值
|
|||
|
|
let tmp: any = {
|
|||
|
|
value: data ? data[props.valueName] : null,
|
|||
|
|
label: data ? data[props.labelName] : null
|
|||
|
|
};
|
|||
|
|
// 判断是否有需要额外携带的参数
|
|||
|
|
if (data && data.extra !== undefined) tmp.extra = data.extra;
|
|||
|
|
selectValue.value.push(tmp);
|
|||
|
|
} else if (props.mode == 'mutil-column') {
|
|||
|
|
// 初始默认选中值
|
|||
|
|
columnIndex.map((item: any, idx: number) => {
|
|||
|
|
let data = columnData.value[idx][columnIndex[idx]];
|
|||
|
|
// 初始默认选中值
|
|||
|
|
let tmp: any = {
|
|||
|
|
value: data ? data[props.valueName] : null,
|
|||
|
|
label: data ? data[props.labelName] : null
|
|||
|
|
};
|
|||
|
|
// 判断是否有需要额外携带的参数
|
|||
|
|
if (data && data.extra !== undefined) tmp.extra = data.extra;
|
|||
|
|
selectValue.value.push(tmp);
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
function close() {
|
|||
|
|
emit('update:modelValue', false);
|
|||
|
|
// 重置default-value默认值
|
|||
|
|
// defaultSelector.value = [0];
|
|||
|
|
}
|
|||
|
|
// 点击确定或者取消
|
|||
|
|
function getResult(event: 'update:modelValue' | 'confirm' | 'cancel' | 'click' | null = null) {
|
|||
|
|
// #ifdef MP-WEIXIN
|
|||
|
|
if (moving.value) return;
|
|||
|
|
// #endif
|
|||
|
|
|
|||
|
|
if (event) emit(event, selectValue.value);
|
|||
|
|
// 如果是用户确认，则保存已确认的索引，作为下次打开时的默认值
|
|||
|
|
if (event === 'confirm') {
|
|||
|
|
// deep copy
|
|||
|
|
savedSelector.value = defaultSelector.value ? defaultSelector.value.slice() : null;
|
|||
|
|
}
|
|||
|
|
close();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
function selectHandler() {
|
|||
|
|
emit('click');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 类型守卫提前声明
|
|||
|
|
function is2DList(list: SelectListItem[] | SelectListItem[][]): list is SelectListItem[][] {
|
|||
|
|
return Array.isArray(list) && list.length > 0 && Array.isArray(list[0]);
|
|||
|
|
}
|
|||
|
|
</script>
|
|||
|
|
|
|||
|
|
<style scoped lang="scss">
|
|||
|
|
@import '../../libs/css/style.components.scss';
|
|||
|
|
|
|||
|
|
.u-select {
|
|||
|
|
&__action {
|
|||
|
|
position: relative;
|
|||
|
|
line-height: 70rpx;
|
|||
|
|
height: 70rpx;
|
|||
|
|
|
|||
|
|
&__icon {
|
|||
|
|
position: absolute;
|
|||
|
|
right: 20rpx;
|
|||
|
|
top: 50%;
|
|||
|
|
transition: transform 0.4s;
|
|||
|
|
transform: translateY(-50%);
|
|||
|
|
z-index: 1;
|
|||
|
|
|
|||
|
|
&--reverse {
|
|||
|
|
transform: rotate(-180deg) translateY(50%);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
&--border {
|
|||
|
|
border-radius: 6rpx;
|
|||
|
|
border-radius: 4px;
|
|||
|
|
border: 1px solid $u-border-color;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
&__header {
|
|||
|
|
@include vue-flex;
|
|||
|
|
align-items: center;
|
|||
|
|
justify-content: space-between;
|
|||
|
|
height: 80rpx;
|
|||
|
|
position: relative;
|
|||
|
|
|
|||
|
|
&__title {
|
|||
|
|
color: $u-content-color;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
&__btn {
|
|||
|
|
min-width: 150rpx;
|
|||
|
|
padding: 20rpx 30rpx;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
&__header::after {
|
|||
|
|
content: '';
|
|||
|
|
position: absolute;
|
|||
|
|
border-bottom: 1rpx solid var(--u-border-color);
|
|||
|
|
-webkit-transform: scaleY(0.5);
|
|||
|
|
transform: scaleY(0.5);
|
|||
|
|
bottom: 0;
|
|||
|
|
right: 0;
|
|||
|
|
left: 0;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
&__body {
|
|||
|
|
width: 100%;
|
|||
|
|
height: 500rpx;
|
|||
|
|
overflow: hidden;
|
|||
|
|
background-color: var(--u-bg-white);
|
|||
|
|
|
|||
|
|
&__picker-view {
|
|||
|
|
height: 100%;
|
|||
|
|
box-sizing: border-box;
|
|||
|
|
|
|||
|
|
&__item {
|
|||
|
|
@include vue-flex;
|
|||
|
|
align-items: center;
|
|||
|
|
justify-content: center;
|
|||
|
|
font-size: 32rpx;
|
|||
|
|
color: $u-main-color;
|
|||
|
|
padding: 0 8rpx;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
</style>
|