lilishop-uniapp/utils/tools.js

/**
 * 解析url参数
 * @example ?id=12345&a=b
 * @return Object {id:12345,a:b}
 */
function urlParse(url) {
  let obj = {};
  let reg = /[?&][^?&]+=[^?&]+/g;
  let arr = url.match(reg);
  if (arr) {
    arr.forEach(item => {
      let tempArr = item.substring(1).split("=");
      let key = decodeURIComponent(tempArr[0]);
      let val = decodeURIComponent(tempArr.splice(1).join("="));
      obj[key] = val;
    });
  }
  return obj;
}

const getNetworkType = () => {
  uni.getNetworkType({
    success: res => {
      if (res.networkType === "none") {
        uni.showToast({
          title: "网络好像有点问题,请检查后重试！",
          duration: 2000,
          icon: "none"
        });
        let pages = getCurrentPages();
        if (pages.length) {
          let route = pages[pages.length - 1].route;
          if (route !== "pages/empty/empty") {
            uni.navigateTo({
              url: `/pages/empty/empty?type=wifi`
            });
          }
        } else {
          uni.navigateTo({
            url: `/pages/empty/empty?type=wifi`
          });
        }
      }
    }
  });
};

const throttle = (fn, that, gapTime) => {
  // export function throttle(fn, gapTime) {
  if (gapTime == null || gapTime == undefined) {
    gapTime = 1800;
  }
  let _lastTime = that.lastTime;
  let _nowTime = +new Date();
  if (_nowTime - _lastTime > gapTime || !_lastTime) {
    fn.apply(that, arguments); //将this和参数传给原函数
    that.lastTime = _nowTime;
  }
};

/**
 * 计算传秒数的倒计时【天、时、分、秒】
 * @param seconds
 * @returns {{day : *, hours : *, minutes : *, seconds : *}}
 */
const countTimeDown = seconds => {
  const leftTime = time => {
    if (time < 10) time = "0" + time;
    return time + "";
  };
  return {
    day: leftTime(parseInt(seconds / 60 / 60 / 24, 10)),
    hours: leftTime(parseInt((seconds / 60 / 60) % 24, 10)),
    minutes: leftTime(parseInt((seconds / 60) % 60, 10)),
    seconds: leftTime(parseInt(seconds % 60, 10))
  };
};

/**
 * 计算当前时间到第二天0点的倒计时[秒]
 * @returns {number}
 */
const theNextDayTime = () => {
  const nowDate = new Date();
  const time =
    new Date(
      nowDate.getFullYear(),
      nowDate.getMonth(),
      nowDate.getDate() + 1,
      0,
      0,
      0
    ).getTime() - nowDate.getTime();
  return parseInt(time / 1000);
};
// 防抖
const debounce = (fn, delay) => {
  // 时间期限
  var delays = delay || 200;
  var timer;
  // 闭包
  return function() {
    // 考虑作用域，上下文环境，apply需要用到this对象
    var th = this;
    // 接收的参数用 ES6 中的 rest 参数统一存储到变量 args 中。arguments就是传入的参数数组,而且个数可以不确定的传回给fn（不确定函数到底有多少个参数，用arguments来接收）
    var args = arguments;
    // 判断还在定时，说明当前正在一个计时过程中，并且又触发了相同事件。所以要取消当前的计时，重新开始计时
    if (timer) {
      clearTimeout(timer);
    }
    timer = setTimeout(function() {
      timer = null;
      // 执行方法
      fn.apply(th, args);
    }, delays);
  };
};
export { getNetworkType, throttle, countTimeDown, theNextDayTime, debounce };