signuptool-ui-xcx/components/city-select/city-select.vue

<template>
	<!-- 城市选择-->
	<view class="city-select">
		<StatusBar></StatusBar>
		<!-- 预留搜索-->
		<view style="background-color: #FFFFFF;">
			<view :style="{'height':navHeight,'display': 'flex','box-sizing': 'border-box','flex-direction':'row',
			'align-items':'center','width':width}">
				<view class="city-serach" v-if="isSearch">
					<input @input="keyInput" placeholder="请输入城市名称">
				</view>
				<text style="font-size: 27rpx;margin-right: 20rpx;color: #999999;border-left: 1px solid #f1f1f1;padding-left: 20rpx;"
				 @click="close">取消</text>
			</view>
		</view>
		<scroll-view :scroll-top="scrollTop" scroll-y="true" class="city-select-main" id="city-select-main">
			<!-- 当前定位城市 -->
			<view class="hot-title" v-if="activeCity && !serachCity">当前定位城市</view>
			<view class="hot-city" v-if="activeCity && !serachCity">
				<view class="hot-item" @click="cityTrigger(activeCity)">{{ activeCity[formatName] }}</view>
			</view>
			<!-- 热门城市 -->
			<view class="hot-title" v-if="hotCity.length > 0 && !serachCity">热门城市</view>
			<view class="hot-city" v-if="hotCity.length > 0 && !serachCity">
				<template v-for="(item, index) in hotCity">
					<view :key="index" @click="cityTrigger(item, 'hot')" class="hot-item">{{ item[formatName] }}</view>
				</template>
			</view>
			<!-- 城市列表(搜索前) -->
			<view class="citys" v-if="!serachCity">
				<view v-for="(city, index) in sortItems" :key="index" v-if="city.isCity">
					<view class="citys-item-letter" :id="'city-letter-' + (city.name === '#' ? '0' : city.name)">{{ city.name }}</view>
					<view class="citys-item" v-for="(item, inx) in city.citys" :key="inx" @click="cityTrigger(item)">{{ item.cityName }}</view>
				</view>
			</view>
			<!-- 城市列表(搜索后)  -->
			<view class="citys" v-if="serachCity">
				<view v-for="(item, index) in searchDatas" :key="index">
					<view class="citys-item" :key="index" @click="cityTrigger(item)">{{ item.name }}</view>
				</view>
			</view>
		</scroll-view>
		<!-- 城市选择索引-->
		<view class="city-indexs-view" v-if="!serachCity">
			<view class="city-indexs">
				<view v-for="(cityIns, index) in handleCity" v-if="cityIns.isCity" :key="index" @click="cityindex(cityIns.name)">{{ cityIns.name }}</view>
			</view>
		</view>
	</view>
</template>

<script>
	import citySelect from './citySelect.js'
	export default {
		props: {
			//传入要排序的名称
			formatName: {
				type: String,
				default: 'cityName'
			},
			//当前定位城市
			activeCity: {
				type: Object,
				default: () => null
			},
			//热门城市
			hotCity: {
				type: Array,
				default: () => []
			},
			//城市数据
			obtainCitys: {
				type: Array,
				default: () => []
			},
			//是否有搜索
			isSearch: {
				type: Boolean,
				default: true
			}
		},
		data() {
			return {
				navHeight: "",
				width: "",
				totalHeight: "",
				scrollTop: 0, //scroll-view 滑动的距离
				cityindexs: [], // 城市索引
				activeCityIndex: '', // 当前所在的城市索引
				handleCity: [], // 处理后的城市数据
				serachCity: '', // 搜索的城市
				cityData: []
			}
		},
		computed: {
			/**
			 * @desc 城市列表排序
			 * @return  Array
			 */
			sortItems() {
				for (let index = 0; index < this.handleCity.length; index++) {
					if (this.handleCity[index].isCity) {
						var cityArr = this.handleCity[index].citys
						cityArr = cityArr.sort(function(a, b) {
							var value1 = a.unicode
							var value2 = b.unicode
							return value1 - value2
						})
					}
				}
				return this.handleCity
			},
			/**
			 * @desc 搜索后的城市列表
			 * @return Array
			 */
			searchDatas() {
				var searchData = []
				for (let i = 0; i < this.cityData.length; i++) {
					if (this.cityData[i][this.formatName].indexOf(this.serachCity) !== -1) {
						searchData.push({
							oldData: this.cityData[i],
							name: this.cityData[i][this.formatName]
						})
					}
				}
				return searchData
			}
		},
		created() {
			// 初始化城市数据
			this.cityData = this.obtainCitys
			this.initializationCity()
			this.buildCityindexs()
			// 获取状态栏高度
			let info = uni.getSystemInfoSync()
			let statusBarHeight = info.statusBarHeight
			this.statusBarHeight = statusBarHeight + 'px'

			this.navHeight = '45px'
			this.width = '100%'
			this.totalHeight = 45 + statusBarHeight + 'px'

			// 获取胶囊高度
			// #ifdef MP-WEIXIN||MP-BAID||MP-QQ||MP-TOUTIAO
			let menuButton = uni.getMenuButtonBoundingClientRect()
			let top = menuButton.top
			let bottom = menuButton.bottom
			let navHeight = bottom - top + (top - statusBarHeight) * 2 + 4
			this.navHeight = navHeight + 'px'
			this.width = menuButton.left + 'px'
			this.totalHeight = navHeight + statusBarHeight + 'px'
			// #endif
		},
		watch: {
			obtainCitys(newData) {
				this.updateCitys(newData)
			}
		},
		methods: {
			/**
			 * @desc 初始化
			 */
			updateCitys(data) {
				if (data && data.length) {
					this.cityData = data
					this.initializationCity()
					this.buildCityindexs()
				}
			},
			/**
			 * @desc 监听输入框的值
			 */
			keyInput(event) {
				this.serachCity = event.detail.value
			},
			/**
			 * @desc 初始化城市数据
			 * @return undefind
			 */
			initializationCity() {
				this.handleCity = []
				const cityLetterArr = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
					'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '#'
				]
				for (let index = 0; index < cityLetterArr.length; index++) {
					this.handleCity.push({
						name: cityLetterArr[index],
						isCity: false, // 用于区分是否含有当前字母开头的城市
						citys: [] // 存放城市首字母含是此字母的数组
					})
				}
			},
			/**
			 * @desc 得到城市的首字母
			 * @param str String
			 */
			getLetter(str) {
				return citySelect.getFirstLetter(str[0])
			},
			/**
			 * @desc 构建城市索引
			 * @return undefind
			 */
			buildCityindexs() {
				this.cityindexs = []
				for (let i = 0; i < this.cityData.length; i++) {
					// 获取首字母
					let cityLetter = this.getLetter(this.cityData[i][this.formatName]).firstletter
					// 获取当前城市首字母的unicode，用作后续排序
					let unicode = this.getLetter(this.cityData[i][this.formatName]).unicode

					let index = this.cityIndexPosition(cityLetter)
					if (this.cityindexs.indexOf(cityLetter) === -1) {
						this.handleCity[index].isCity = true
						this.cityindexs.push(cityLetter)
					}

					this.handleCity[index].citys.push({
						cityName: this.cityData[i][this.formatName],
						unicode: unicode,
						oldData: this.cityData[i]
					})
				}
			},
			/**
			 * @desc 滑动到城市索引所在的地方
			 * @param id String 城市索引
			 */
			cityindex(id) {
				//创建节点查询器
				const query = uni.createSelectorQuery().in(this)
				var that = this
				that.scrollTop = 0
				//滑动到指定位置(解决方法:重置到顶部，重新计算，影响:页面会闪一下)
				setTimeout(() => {
					query
						.select('#city-letter-' + (id === '#' ? '0' : id))
						.boundingClientRect(data => {
							// console.log("得到布局位置信息" + JSON.stringify(data));
							// console.log("节点离页面顶部的距离为" + data.top);
							data ? (that.scrollTop = data.top) : void 0
						})
						.exec()
				}, 0)
			},
			/**
			 * @desc 获取城市首字母的unicode
			 * @param letter String 城市索引
			 */
			cityIndexPosition(letter) {
				if (!letter) {
					return ''
				}
				const ACode = 65
				return letter === '#' ? 26 : letter.charCodeAt(0) - ACode
			},
			/** @desc 城市列表点击事件
			 *  @param Object
			 */
			cityTrigger(item, isHot) {
				// 传值到父组件
				this.$emit('cityClick', item.oldData ? item.oldData : item)
			},
			close() {
				this.Back()
			}
		}
	}
</script>

<style lang="scss">
	//宽度转换vw
	@function vww($number) {
		@return ($number / 375) * 750+rpx;
	}

	view {
		box-sizing: border-box;
	}

	.city-serach {
		flex: 1;
		color: #4a4a4a;
		padding: 0 vww(10);

		&-input {
			margin: vww(13) 0;
			height: vww(40);
			line-height: vww(40);
			font-size: vww(14);
			padding: 0 vww(5);
			border: 1px solid #4d8cfd;
			border-radius: 3px;
		}
	}

	.city-select-main {
		position: relative;
		// overflow: scroll;
		// -webkit-overflow-scrolling: touch;
		width: 100%;
		height: 100%;
		background: #FFFFFF;
		// overflow-y: auto;
	}

	.city-select {
		position: relative;
		width: 100vw;
		height: 100vh;
		background: #f6f5fa;

		// 热门城市
		.hot-title {
			padding-left: vww(13);
			width: 100vw;
			font-size: 14px;
			line-height: vww(30);
			color: #9b9b9b;
			background-color: #ededed;
		}

		.hot-city {
			padding-left: vww(23);
			padding-right: vww(20);
			padding-top: vww(12);
			overflow: hidden;
			width: 100vw;

			.hot-item {
				float: left;
				padding: 0 vww(5);
				margin-right: vww(16);
				margin-bottom: vww(12);
				overflow: hidden;
				width: vww(100);
				height: vww(31);
				font-size: 14px;
				text-align: center;
				border-radius: vww(5);

				display: -webkit-box;
				-webkit-box-orient: vertical;
				-webkit-line-clamp: 1;

				line-height: vww(31);
				color: #4a4a4a;
				background: #f5f5f5;

				&:nth-child(3n) {
					margin-right: 0;
				}
			}

			.hot-hidden {
				display: none;
				margin-right: 0;
			}
		}

		.citys {
			>view {
				padding-left: vww(18);
				width: 100%;
				font-size: 14px;
				background: #fff;

				.citys-item-letter {
					margin-left: vww(-18);
					padding-left: vww(18);
					margin-top: -1px;
					width: 100vw;
					line-height: vww(30);
					color: #9b9b9b;
					background: #ededed;
					border-top: none;
				}

				.citys-item {
					width: 100%;
					line-height: vww(50);
					color: #4a4a4a;
					border-bottom: 0.1px solid #ebebf0;

					&:last-child {
						border: none;
					}
				}
			}
		}

		.city-indexs-view {
			position: absolute;
			right: 0;
			top: 0;
			z-index: 999;
			display: flex;
			width: vww(20);
			height: 100%;
			text-align: center;

			.city-indexs {
				width: vww(20);
				text-align: center;
				vertical-align: middle;
				align-self: center;

				>view {
					margin-bottom: vww(10);
					width: vww(20);
					font-size: 12px;
					color: #4d8cfd;

					&:last-child {
						margin-bottom: 0;
					}
				}
			}
		}
	}
</style>