小程序定位计算当前位置到附近商家的距离 点击商家跳转导航

引入腾讯地图api

	import QQMapWX from '../../static/js/qqmap-wx-jssdk.js' //官网下载保存到static文件夹引入

1.定位当前位置

		uni.getLocation({
				type: 'gcj02',
				success: res => {
					this.covers[0].latitude = res.latitude;
					this.covers[0].longitude = res.longitude;
					this.latitude = res.latitude;
					this.longitude = res.longitude; // 当前地址的经纬度赋值给view里的map
				}
			});

2.获取商家地址转换经纬度计算距离

getcompany() {
				var _this = this
				uni.request({
					url: 'api',
					method: 'GET',
					data: {
						page: page,
						limit:5
					},
					success: res => {
						this.companyList = res.data.data //获取到商家信息
						 //取出地址的字段
						this.cAddress = res.data.data.map(obj => {
							return obj.ccity + obj.caddress
						})
						//实例化api核心类
						let qqmapsdk = new QQMapWX({
							key: '密钥'
						});
						let promiseArr = []
						const addressArr = this.cAddress
						//把所有商家的地址放到数组里去循环换算成经纬度
						for (let i = 0; i < addressArr.length; ++i) {
							promiseArr.push(new Promise((resolve) => {
								qqmapsdk.geocoder({
									address: addressArr[i],
									success(res) {
										resolve({
											latitude: res.result.location.lat,
											longitude: res.result.location.lng
										})
									}
								})
							}))
						}
						Promise.all(promiseArr)
							.then(res => {
							//腾讯地图api里计算距离的方法
								qqmapsdk.calculateDistance({
									from: "",  //为空默认当前位置
									to: res,	//商家的位置
									success(res) {
										var addressKm = []
										for (var i = 0; i < res.result.elements.length; i++) {
										//米转换成km
											res.result.elements[i].distance = res.result.elements[i].distance / 1000    
											res.result.elements[i].distance = Math.round(res.result.elements[i].distance)
											addressKm.push(res.result.elements[i].distance); //将返回数据存入数组，
										}
										for (var j = 0; j < _this.companyList.length; j++) {
											_this.companyList[j].distance = res.result.elements[j].distance //往渲染的商家地址数据里添加新的字段 - 距离
										}
									}
								})
							})
					},
					fail: () => {},
					complete: () => {}
				});
			},

3.导航

//点击某个商家跳转导航
companyAddress(item) {
				var self = this
				uni.request({
					url: ‘api’,
					method: 'GET',
					data: {},
					success: res => {
					//获取所点击商家的地址 转换经纬度
						this.city = res.data.ccity
						this.address = res.data.caddress
						let qqmapsdk = new QQMapWX({
							key: '密钥'
						});
						qqmapsdk.geocoder({
							address: self.city + self.address,
							success(res) {
								//uni.openLocation查看位置
								uni.openLocation({
									latitude: res.result.location.lat,
									longitude: res.result.location.lng,
									success: function() {
										console.log('success');
									}
								});
							},
							fail: function(error) {
								console.error(error);
							},
						});
					},
					fail: () => {},
					complete: () => {}
				});
			}

效果图