jiangximiniprogramSchool/common/js/utils.js

import store from '@/store';

const install = (Vue, vm) => {

	// 打开地图
	const openMap = (lat, lng) => {
		uni.openLocation({
			latitude: lat,
			longitude: lng
		})
	}

	// 距离换算
	const distanceFn = (val) => {
		if (val * 1 < 1000) {
			return val + '米'
		} else {
			return (val / 1000).toFixed(2) + '公里'
		}
	}
	// 价格计算
	const priceTo = (price = 0) => {
		// return (price / 100).toFixed(2)
		return (parseInt(price * 100) / 100 / 100).toFixed(2)

	}

	const distanceLatLng = (lat1, lng1) => {
		var that = this;
		let lat2 = store.state.latLng.lat;
		let lng2 = store.state.latLng.lng;
		let rad1 = lat1 * Math.PI / 180.0;
		let rad2 = lat2 * Math.PI / 180.0;
		let a = rad1 - rad2;
		let b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0;
		let s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(rad1) *
			Math.cos(
				rad2) * Math.pow(
				Math.sin(b / 2), 2)));
		s = s * 6378.137;
		s = Math.round(s * 10000) / 10000;
		s = s.toString();
		s = s.substring(0, s.indexOf('.') + 2);
		return s

	}

	const getLocation = () => {
		return new Promise((resolve, reject) => {
			uni.getLocation({
				type: 'wgs84',
				success: function(res) {
					console.log('当前位置的经度：' + res.longitude);
					console.log('当前位置的纬度：' + res.latitude);
					let obj = {
						lat: res.latitude,
						lng: res.longitude
					}
					store.commit('updateLatLng', obj)
					resolve(obj)
				}
			});
		}).catch((e) => {})
	}


	

	function addZeroPrefix(number) {
		return number < 10 ? `0${number}` : number
	}

	let getDate = (date, splitor = '-') => {
		const year = date.getFullYear()
		const month = date.getMonth() + 1
		const day = date.getDate()
		return `${year}${splitor}${addZeroPrefix(month)}${splitor}${addZeroPrefix(day)}`
	}

	 function doHandleMonth(month){
	 　　var m = month;
	 　　if(month.toString().length == 1){
	 　　　　m = "0" + month;
	 　　}
	 　　return m;
	 }
	 
	function getCustomDay(day){
	 
	　　var today = new Date();
	 
	　　var targetday_milliseconds=today.getTime() + 1000*60*60*24*day;
	 
	　　today.setTime(targetday_milliseconds); //注意，这行是关键代码
	 
	　　var tYear = today.getFullYear();
	 
	　　var tMonth = today.getMonth();
	 
	　　var tDate = today.getDate();
	 
	　　tMonth = doHandleMonth(tMonth + 1);
	 
	　　tDate = doHandleMonth(tDate);
	 
	　　return tYear+"-"+tMonth+"-"+tDate;
	 
	}
	 
	


	vm.$u.utils = {
		openMap,
		getLocation,
		priceTo,
		distanceLatLng,
		distanceFn,
		getDate,
		getCustomDay
	}
}

export default {
	install
}