city-store-transfer/components/DropDown/DropDown.vue

<template>
	<view class="container">
		<view class="tabs-bg"></view>
		<view class="tabs">
			<view class="title-view" v-for="(item, index) in title" :key="item" @click="changeActiveIndex(index)"
				:class="{isActive: activeIndex === index}">
				<text>{{item}}</text>
				<view class="arrow" v-if="activeIndex !== index">
					<u-image src="/static/dropdown/dp_icon_lxia.png" width="14rpx" height="11rpx"></u-image>
				</view>
				<view class="arrow" v-if="activeIndex === index">
					<u-image src="/static/dropdown/dp_icon_hlxia.png" width="14rpx" height="11rpx"></u-image>
				</view>

			</view>
		</view>
		<view class="item-border">
			<DropDownItem v-show="activeIndex !== -1" :list="tablist" @cancelDrop="cancelDrop" @getQueryInfo="getQueryInfo"
				:type="title[activeIndex]" :activeChoose="setActiveTag" :key="tablist" ref="dropdownitem"
				@cancelPageNum="cancelPageNum" />
		</view>
	</view>
</template>

<script>
	/**
	 * @property {Array} postlist   传递一个二维数组
	 */
	import DropDownItem from "./DropDownItem.vue"
	export default {
		name: "DropDown",
		components: {
			DropDownItem
		},
		data() {
			return {
				title: ['行业', '区域', '面积', '筛选'],
				activeIndex: -1,
				// 是否显示下拉框
				isShow: false,
				postlist: [
					[],
					[],
					['全部', '小于50m²', '50-200m²', '200-600m²', '600-800m²', '800-1000m²', '1000m²以上'],
					['全部', '面积从大到小', '面积从小到大', '租金从大到小', '租金从小到大']
				],
				queryInfo: {
					region: '',
					sortType: '',
					areatype: '',
					business: ''
				},
				// 当前选中的行业下拉列表项
				currentClassActive: 0,
				// 当前选中的区域下拉列表项
				currentRegionActive: 0,
				// 当前选中的面积下拉列表项
				currentAreaActive: 0,
				// 当前选中的筛选下拉列表项
				currentFilterActive: 0,
			};
		},
		computed: {
			tablist: function() {
				return this.postlist[this.activeIndex]
			},
			setActiveTag: function() {
				if (this.activeIndex == 0) {
					return this.currentClassActive
				} else if (this.activeIndex == 1) {
					return this.currentRegionActive
				} else if (this.activeIndex == 2) {
					return this.currentAreaActive
				} else if (this.activeIndex == 3) {
					return this.currentFilterActive
				}
			}
		},
		created() {
			this.postlist[0] = JSON.parse(uni.getStorageSync('classList'))
			this.postlist[0].unshift('全部')
			this.postlist[1] = JSON.parse(uni.getStorageSync('regionList'))
			this.postlist[1].unshift('全区域')
			// this.postlist[2].unshift('所有面积')
			// this.postlist[3].unshift('全部')
		},
		watch: {
			setActiveTag(reset) {

			}
		},
		methods: {
			changeActiveIndex(index) {
				if (this.activeIndex === index) {
					this.activeIndex = -1;
				} else
					this.activeIndex = index
			},
			cancelDrop() {
				this.activeIndex = -1;
			},
			cancelPageNum() {
				this.$emit('cancelPageNum')
			},
			getQueryInfo(querys) {

				// console.log(querys, 'getquerysinfo');
				// 修改当前选择的各选项卡下标
				// 记忆各下拉框数据

				if (this.activeIndex === 0) {
					this.currentClassActive = querys.business
				} else if (this.activeIndex === 1) {
					this.currentRegionActive = querys.region
				} else if (this.activeIndex === 2) {
					this.currentAreaActive = querys.areatype
				} else if (this.activeIndex === 3) {
					this.currentFilterActive = querys.sortType
				}
				// 特殊处理行业、区域
				if (querys.business) {
					querys.business = this.tablist[this.currentClassActive]
				}
				if (querys.region) {
					querys.region = this.tablist[this.currentRegionActive]
				}

				this.queryInfo = {
					...this.queryInfo,
					...querys
				}
				const query = this.$u.queryParams(this.queryInfo)
				// console.log(querys, 'dropquery');
				this.$emit('getQueryInfo', this.queryInfo)
			},
			resetInfo() {
				// console.log("重置了Dropdown");
				this.queryInfo = {
					region: '',
					sortType: '',
					areatype: '',
					business: ''
				}
				this.currentClassActive = 0
				this.currentRegionActive = 0
				this.currentAreaActive = 0
				this.currentFilterActive = 0
				// 重置各下拉框保存的数据
				this.$refs.dropdownitem.resetQueryInfo()
			}
		}
	}
</script>

<style lang="scss" scoped>
	.isActive {
		color: #CC3333;
	}

	.container {
		margin-top: 10px;
		position: relative;

		.tabs-bg {
			position: absolute;
			background-color: $uni-bg-color-grey;
			height: 120rpx;
			width: 100%;
			transform: translateY(-20rpx);
			z-index: 2;
		}

		.tabs {
			background-color: #fff;
			height: 100rpx;
			display: flex;
			justify-content: space-around;
			position: relative;
			z-index: 3;
		}

		.title-view {
			display: flex;

			>text {
				font-size: 14px;
				display: flex;
				flex-direction: column;
				justify-content: center;
			}
		}

		.arrow {
			margin-left: 8rpx;
			display: flex;
			flex-direction: column;
			justify-content: center;
		}
	}

	.item-border {
		position: absolute;
		width: 100%;
		height: 100%;
	}
</style>