这是小程序项目中常用累积的方法，分享给大家，希望对大家有一些帮助。
github地址 git@github.com:13507404693/-i.git
里面还有我做的一个项目，大家可以下载看看，里面有自定义小程序组件，es6的新方法使用，api使用方法集成。
/**
* 日期格式化
* @param {String} date 日期
*/
const formatTime = date => {
const year = date.getFullYear()
const month = date.getMonth() + 1
const day = date.getDate()
const hour = date.getHours()
const minute = date.getMinutes()
const second = date.getSeconds()
return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}
/**
* 获取本月第一天
* @param {String} date 日期
*/
const Firstmonth= date => {
// var date = new Date();
var year = date.getFullYear() + "";
var month = (date.getMonth() + 1) + "";
// 本月第一天日期
var begin = year + "-" + month+"-01"
return begin
}
/**
* 本月最后一天日期
* @param {String} date 日期
*/
const Thelastmonth = date => {
var year = date.getFullYear() + "";
var month = (date.getMonth() + 1) + "";
var lastDateOfCurrentMonth = new Date(year, month, 0);
var end = year + "-" + month + "-" + lastDateOfCurrentMonth.getDate()
return end;
}
/**
* 数字补 0
* @param {Number} n
*/
const formatNumber = n => {
n = n.toString()
return n[1] ? n : '0' + n
}
/**
* 验证手机号码
* @param {number} num 手机号码
*/
const isPoneAvailable = num => {
const reg = /^[1][3,4,5,7,8][0-9]{9}$/;
if (!reg.test(num)) {
return false;
} else {
return true;
}
};
/**
* 显示成功弹窗
* @param {String} title 标题
*/
const showSuccessToast = (title, icon, time) => {
let param = {
title: title || '错误',
duration: time || 1000
};
if (icon === '') {
Object.assign(param, {
icon: 'none'
});
} else {
Object.assign(param, {
icon: 'none',
image: '../../images/success.png'
});
};
wx.showToast(param);
}
/**
* 显示错误弹窗
* @param {String} title 标题
*/
const showErrorToast = (title, icon, time) => {
let param = {
title: title || '错误',
duration: time || 1000
};
if (icon === '') {
Object.assign(param, {
icon: 'none'
});
} else {
Object.assign(param, {
icon: 'none',
image: '../../images/errors.png'
});
};
wx.showToast(param);
}
/**
* id 分割
* @param {String} param
*/
const idSplit = param => {
if (typeof param + '' !== 'string') return '';
let strArr = param.split('');
let str = '';
for (let i = 0; i < strArr.length; i++) {
str += i % 4 === 3 ? strArr[i] + ' ' : strArr[i];
};
return str;
};
/**
* 去除字符串 Html 标签
* @param {String} str HTML
*/
const filterHtml = str => {
str = str.replace(/<\/?[^>]*>/g, ''); //去除HTML tag
str = str.replace(/[ | ]*\n/g, ''); //去除行尾空白
str = str.replace(/\n[\s| | ]*\r/g, ''); //去除多余空行
str = str.replace(/ /g, '');
return str;
}
const extractURLparmes = url => {
let pattern = /(\w+)=(\w+)/ig;
let parames = {};
url.replace(pattern, function (a, b, c) {
parames[b] = c;
});
return parames;
};
/**
* 对像数组去重
* @param {Array} arr HTML
*/
const unique = (arr, key) => {
var res = [];
var json = {};
for (var i = 0; i < arr.length; i++) {
if (!json[arr[i][key]]) {
res.push(arr[i]);
json[arr[i][key]] = 1;
}
}
return res;
};
/**
* 切除 emoji表情
* @param {String} str
*/
const filterEmoji = str => {
return str.replace(/\uD83C[\uDF00-\uDFFF]|\uD83D[\uDC00-\uDE4F]/g, "");
}
/**
* 验证 金额
* @param {Strong} value 金额
*/
const validateMoney = value => {
const money = value;
const moneyss = /^(([0-9]+[\.]?[0-9]{1,2})|[1-9])$/;
if (money === '') return false;
if (!moneyss.test(money) || money <= 0) {
return false;
};
return true
};
/**
* 计算两个 经纬度 距离
*/
const getGreatCircleDistance = (lat1, lng1, lat2, lng2) => {
var EARTH_RADIUS = 6378137.0; //单位M
var PI = Math.PI;
function getRad(d) {
return d * PI / 180.0;
}
var radLat1 = getRad(lat1);
var radLat2 = getRad(lat2);
var a = radLat1 - radLat2;
var b = getRad(lng1) - getRad(lng2);
var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
s = s * EARTH_RADIUS;
s = Math.round(s * 10000) / 10000.0;
return s;
}
module.exports = {
formatTime,
formatNumber,
isPoneAvailable,
showSuccessToast,
showErrorToast,
idSplit,
filterHtml,
extractURLparmes,
unique,
filterEmoji,
validateMoney,
getGreatCircleDistance,
Firstmonth,
Thelastmonth
}
