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<template>
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<view class="u-select">
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<u-popup :maskCloseAble="maskCloseAble" mode="bottom" :popup="false" v-model="value" length="auto"
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:safeAreaInsetBottom="safeAreaInsetBottom" @close="close" :z-index="uZIndex">
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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 class="u-select__header__cancel u-select__header__btn" :style="{ color: cancelColor }"
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hover-class="u-hover-class" :hover-stay-time="150" @tap="getResult('cancel')">
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{{cancelText}}
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</view>
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<view class="u-select__header__title">
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{{title}}
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</view>
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<view class="u-select__header__confirm u-select__header__btn"
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:style="{ color: moving ? cancelColor : confirmColor }" hover-class="u-hover-class"
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:hover-stay-time="150" @touchmove.stop="" @tap.stop="getResult('confirm')">
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{{confirmText}}
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</view>
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</view>
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<view class="u-select__body u-select__body__multiple">
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<scroll-view :scroll-y="true" style="height: 100%">
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<u-checkbox-group @change="checkboxGroupChange" wrap>
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<u-checkbox v-model="item.checked" :name="item[valueName]" v-for="(item,i) in columnData"
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:key="i">{{item[labelName]}}</u-checkbox>
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</u-checkbox-group>
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</scroll-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>
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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 http://uviewui.com/components/select.html
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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#606266)
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* @property {String} confirm-color 确认按钮的颜色(默认#2979ff)
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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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export default {
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props: {
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// 列数据
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list: {
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type: Array,
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default () {
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return [];
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}
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},
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// 是否显示边框
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border: {
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type: Boolean,
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default: true
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},
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// 通过双向绑定控制组件的弹出与收起
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value: {
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type: Boolean,
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default: false
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},
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// "取消"按钮的颜色
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cancelColor: {
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type: String,
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default: '#606266'
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},
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// "确定"按钮的颜色
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confirmColor: {
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type: String,
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default: '#2979ff'
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},
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// 弹出的z-index值
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zIndex: {
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type: [String, Number],
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default: 0
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},
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safeAreaInsetBottom: {
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type: Boolean,
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default: false
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},
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// 是否允许通过点击遮罩关闭Picker
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maskCloseAble: {
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type: Boolean,
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default: true
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},
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// 提供的默认选中的下标
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defaultValue: {
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type: Array,
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default () {
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return [];
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}
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},
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// 自定义value属性名
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valueName: {
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type: String,
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default: 'value'
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},
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// 自定义label属性名
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labelName: {
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type: String,
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default: 'label'
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},
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// 自定义多列联动模式的children属性名
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childName: {
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type: String,
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default: 'children'
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},
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// 顶部标题
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title: {
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type: String,
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default: ''
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},
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// 取消按钮的文字
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cancelText: {
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type: String,
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default: '取消'
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},
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// 确认按钮的文字
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confirmText: {
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type: String,
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default: '确认'
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}
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},
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data() {
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return {
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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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defaultSelector: [],
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// picker-view的数据
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columnData: [],
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// 每次队列发生变化时,保存选择的结果
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selectValue: [],
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// 上一次列变化时的index
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lastSelectIndex: [],
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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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moving: false
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};
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},
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watch: {
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// 在select弹起的时候,重新初始化所有数据
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value: {
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immediate: true,
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handler(val) {
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if (val) setTimeout(() => this.init(), 10);
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}
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},
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},
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computed: {
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uZIndex() {
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// 如果用户有传递z-index值,优先使用
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return this.zIndex ? this.zIndex : this.$u.zIndex.popup;
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},
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},
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methods: {
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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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pickstart() {
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// #ifdef MP-WEIXIN
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this.moving = true;
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// #endif
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},
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// 标识滑动结束
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pickend() {
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// #ifdef MP-WEIXIN
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this.moving = false;
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// #endif
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},
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init() {
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this.setColumnData();
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this.setSelectValue();
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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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setColumnData() {
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this.columnData = this.list.map((o, i) => ({
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...o,
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checked: false
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}))
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},
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// 获取默认选中的值
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setSelectValue() {
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this.selectValue = this.defaultValue
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outer: for (let i = 0; i < this.defaultValue.length; i++) {
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inner: for (let j = 0; j < this.columnData.length; j++) {
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if (this.defaultValue[i] === this.columnData[j][this.valueName]) {
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this.columnData[j].checked = true
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break inner
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}
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}
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}
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},
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checkboxGroupChange(e) {
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this.selectValue = e
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},
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close() {
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this.$emit('input', false);
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},
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// 点击确定或者取消
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getResult(event = null) {
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// #ifdef MP-WEIXIN
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if (this.moving) return;
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// #endif
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if (event) {
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let label = ''
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if (this.selectValue.length) {
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for (let i = 0; i < this.columnData.length; i++) {
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if (this.columnData[i].checked) {
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if (!label) {
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label += this.columnData[i][this.labelName]
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} else {
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label += ',' + this.columnData[i][this.labelName]
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}
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}
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}
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}
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this.$emit(event, this.selectValue, label);
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}
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this.close();
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},
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selectHandler() {
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this.$emit('click');
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}
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}
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};
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</script>
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<style scoped lang="scss">
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@import "@/uview-ui/libs/css/style.components.scss";
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.u-select {
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&__action {
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position: relative;
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line-height: $u-form-item-height;
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height: $u-form-item-height;
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&__icon {
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position: absolute;
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right: 20rpx;
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top: 50%;
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transition: transform .4s;
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transform: translateY(-50%);
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z-index: 1;
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&--reverse {
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transform: rotate(-180deg) translateY(50%);
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}
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}
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}
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&__hader {
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&__title {
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color: $u-content-color;
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}
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}
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&--border {
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border-radius: 6rpx;
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border-radius: 4px;
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border: 1px solid $u-form-item-border-color;
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}
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&__header {
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@include vue-flex;
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align-items: center;
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justify-content: space-between;
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height: 80rpx;
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padding: 0 40rpx;
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}
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&__body {
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width: 100%;
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height: 500rpx;
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overflow: hidden;
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background-color: #fff;
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&__picker-view {
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height: 100%;
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box-sizing: border-box;
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&__item {
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@include vue-flex;
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align-items: center;
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justify-content: center;
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font-size: 32rpx;
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color: $u-main-color;
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padding: 0 8rpx;
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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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