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微信小程序工具函数封装
来源：jb51　　时间：2019/10/29 10:07:31　　对本文有异议

本文实例为大家分享了微信小程序工具函数封装的具体代码，供大家参考，具体内容如下

  1. const formatTime = date => {
  2.  const year = date.getFullYear()
  3.  const month = date.getMonth() + 1
  4.  const day = date.getDate()
  5.  const hour = date.getHours()
  6.  const minute = date.getMinutes()
  7.  const second = date.getSeconds()
  8.  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
  9. }
  10.  
  11. const formatNumber = n => {
  12.  n = n.toString()
  13.  return n[1] ? n : '0' + n
  14. }
  15.  
  16. function http(url, callback) {
  17.  var that = this;
  18.  wx.request({
  19.  url: url,
  20.  success: function (res) {
  21.   callback(res.data.data);
  22.  }
  23.  })
  24. }
  25.  
  26.  
  27. function processMasterData(data) {
  28.  return data;
  29. }
  30.  
  31. function jiamiParams(obj) {
  32.  var str = '';
  33.  var newKey = Object.values(obj);
  34.  
  35.  for (var i = 0; i < newKey.length; i++) {
  36.  str += newKey[i];
  37.  }
  38.  return md5(str + 'yueduqiyuan');
  39. }
  40.  
  41. function tiaozhuanAd(leixing, id) {
  42.  switch (leixing) {
  43.  case 1:
  44.   wx.navigateTo({
  45.   url: 'book-detail/book-detail?id=' + id,
  46.   });
  47.   break;
  48.  
  49.  case 2:
  50.   wx.navigateTo({
  51.   url: '../page-url/page-url?url=' + id,
  52.   });
  53.   break;
  54.  case 3:
  55.   wx.navigateTo({
  56.   url: 'index-searchresult/index-searchresult?key=' + id,
  57.   });
  58.   break;
  59.  
  60.  case 4:
  61.   wx.navigateTo({
  62.   url: 'famous-master/famous-master?id=' + id,
  63.   });
  64.   break;
  65.  
  66.  case 5:
  67.   break;
  68.  
  69.  }
  70.  
  71. }
  72.  
  73.  
  74. function tiaozhuan(leixing, id) {
  75.  switch (leixing) {
  76.  case 1:
  77.   wx.navigateTo({
  78.   url: '../heji-list/heji-list?category=' + id,
  79.   });
  80.   break;
  81.  case 2:
  82.   wx.navigateTo({
  83.   url: '../heji-list/heji-list?category=' + id,
  84.   });
  85.   break;
  86.  case 3:
  87.   wx.navigateTo({
  88.   url: '../page-url/page-url?url=' + id,
  89.   });
  90.   break;
  91.  case 4:
  92.   wx.navigateTo({
  93.   url: '../famous-master/famous-master?id=' + id,
  94.   });
  95.   break;
  96.  case 5:
  97.   wx.navigateTo({
  98.   url: '../heji-list/heji-list?age=' + id,
  99.   });
  100.   break;
  101.  case 6:
  102.   wx.navigateTo({
  103.   url: '../hotbook/hotbook?typename=新到图书',
  104.   });
  105.   break;
  106.  case 7:
  107.   wx.navigateTo({
  108.   url: '../hotbook/hotbook?typename=热门图书',
  109.   });
  110.   break;
  111.  
  112.  case "8888":
  113.   wx.navigateTo({
  114.   url: '../hotbook/hotbook?typename=' + id,
  115.   });
  116.   break;
  117.  case "9999":
  118.   {
  119.   wx.navigateTo({
  120.    url: '../book-detail/book-detail?id=' + id,
  121.   });
  122.   break;
  123.   }
  124.  }
  125.  
  126. }
  127.  
  128. /**
  129.  * 二位数组键名排序
  130.  */
  131. function objKeySort(obj) {
  132.  var newkey = Object.keys(obj).sort();
  133.  var newObj = {};
  134.  for (var i = 0; i < newkey.length; i++) {
  135.  newObj[newkey[i]] = obj[newkey[i]];
  136.  }
  137.  return newObj;
  138. }
  139.  
  140.  
  141.  
  142. function md5(string) {
  143.  var x = Array();
  144.  var k, AA, BB, CC, DD, a, b, c, d;
  145.  var S11 = 7, S12 = 12, S13 = 17, S14 = 22;
  146.  var S21 = 5, S22 = 9, S23 = 14, S24 = 20;
  147.  var S31 = 4, S32 = 11, S33 = 16, S34 = 23;
  148.  var S41 = 6, S42 = 10, S43 = 15, S44 = 21;
  149.  string = Utf8Encode(string);
  150.  x = ConvertToWordArray(string);
  151.  a = 0x67452301;
  152.  b = 0xEFCDAB89;
  153.  c = 0x98BADCFE;
  154.  d = 0x10325476;
  155.  for (k = 0; k < x.length; k += 16) {
  156.  AA = a;
  157.  BB = b;
  158.  CC = c;
  159.  DD = d;
  160.  a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
  161.  d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
  162.  c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
  163.  b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
  164.  a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
  165.  d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
  166.  c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
  167.  b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
  168.  a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
  169.  d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
  170.  c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
  171.  b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
  172.  a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
  173.  d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
  174.  c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
  175.  b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
  176.  a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
  177.  d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
  178.  c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
  179.  b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
  180.  a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
  181.  d = GG(d, a, b, c, x[k + 10], S22, 0x2441453);
  182.  c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
  183.  b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
  184.  a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
  185.  d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
  186.  c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
  187.  b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
  188.  a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
  189.  d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
  190.  c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
  191.  b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
  192.  a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
  193.  d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
  194.  c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
  195.  b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
  196.  a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
  197.  d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
  198.  c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
  199.  b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
  200.  a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
  201.  d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
  202.  c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
  203.  b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
  204.  a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
  205.  d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
  206.  c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
  207.  b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
  208.  a = II(a, b, c, d, x[k + 0], S41, 0xF4292244);
  209.  d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
  210.  c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
  211.  b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
  212.  a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
  213.  d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
  214.  c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
  215.  b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
  216.  a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
  217.  d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
  218.  c = II(c, d, a, b, x[k + 6], S43, 0xA3014314);
  219.  b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
  220.  a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
  221.  d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
  222.  c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
  223.  b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
  224.  a = AddUnsigned(a, AA);
  225.  b = AddUnsigned(b, BB);
  226.  c = AddUnsigned(c, CC);
  227.  d = AddUnsigned(d, DD);
  228.  }
  229.  var temp = WordToHex(a) + WordToHex(b) + WordToHex(c) + WordToHex(d);
  230.  return temp.toUpperCase();
  231. }
  232. function RotateLeft(lValue, iShiftBits) {
  233.  return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
  234. }
  235. function AddUnsigned(lX, lY) {
  236.  var lX4, lY4, lX8, lY8, lResult;
  237.  lX8 = (lX & 0x80000000);
  238.  lY8 = (lY & 0x80000000);
  239.  lX4 = (lX & 0x40000000);
  240.  lY4 = (lY & 0x40000000);
  241.  lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
  242.  if (lX4 & lY4) {
  243.  return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
  244.  }
  245.  if (lX4 | lY4) {
  246.  if (lResult & 0x40000000) {
  247.   return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
  248.  } else {
  249.   return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
  250.  }
  251.  } else {
  252.  return (lResult ^ lX8 ^ lY8);
  253.  }
  254. }
  255. function F(x, y, z) {
  256.  return (x & y) | ((~x) & z);
  257. }
  258. function G(x, y, z) {
  259.  return (x & z) | (y & (~z));
  260. }
  261. function H(x, y, z) {
  262.  return (x ^ y ^ z);
  263. }
  264. function I(x, y, z) {
  265.  return (y ^ (x | (~z)));
  266. }
  267. function FF(a, b, c, d, x, s, ac) {
  268.  a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
  269.  return AddUnsigned(RotateLeft(a, s), b);
  270. }
  271. function GG(a, b, c, d, x, s, ac) {
  272.  a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
  273.  return AddUnsigned(RotateLeft(a, s), b);
  274. }
  275. function HH(a, b, c, d, x, s, ac) {
  276.  a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
  277.  return AddUnsigned(RotateLeft(a, s), b);
  278. }
  279. function II(a, b, c, d, x, s, ac) {
  280.  a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
  281.  return AddUnsigned(RotateLeft(a, s), b);
  282. }
  283. function ConvertToWordArray(string) {
  284.  var lWordCount;
  285.  var lMessageLength = string.length;
  286.  var lNumberOfWords_temp1 = lMessageLength + 8;
  287.  var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
  288.  var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
  289.  var lWordArray = Array(lNumberOfWords - 1);
  290.  var lBytePosition = 0;
  291.  var lByteCount = 0;
  292.  while (lByteCount < lMessageLength) {
  293.  lWordCount = (lByteCount - (lByteCount % 4)) / 4;
  294.  lBytePosition = (lByteCount % 4) * 8;
  295.  lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
  296.  lByteCount++;
  297.  }
  298.  lWordCount = (lByteCount - (lByteCount % 4)) / 4;
  299.  lBytePosition = (lByteCount % 4) * 8;
  300.  lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
  301.  lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
  302.  lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
  303.  return lWordArray;
  304. }
  305. function WordToHex(lValue) {
  306.  var WordToHexValue = "", WordToHexValue_temp = "", lByte, lCount;
  307.  for (lCount = 0; lCount <= 3; lCount++) {
  308.  lByte = (lValue >>> (lCount * 8)) & 255;
  309.  WordToHexValue_temp = "0" + lByte.toString(16);
  310.  WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2);
  311.  }
  312.  return WordToHexValue;
  313. }
  314. function Utf8Encode(string) {
  315.  var utftext = "";
  316.  for (var n = 0; n < string.length; n++) {
  317.  var c = string.charCodeAt(n);
  318.  if (c < 128) {
  319.   utftext += String.fromCharCode(c);
  320.  } else if ((c > 127) && (c < 2048)) {
  321.   utftext += String.fromCharCode((c >> 6) | 192);
  322.   utftext += String.fromCharCode((c & 63) | 128);
  323.  } else {
  324.   utftext += String.fromCharCode((c >> 12) | 224);
  325.   utftext += String.fromCharCode(((c >> 6) & 63) | 128);
  326.   utftext += String.fromCharCode((c & 63) | 128);
  327.  }
  328.  }
  329.  return utftext;
  330. }
  331. function requestLoading(url, params, message) {
  332.  let promise = new Promise((resolve, reject) => {
  333.  wx.showNavigationBarLoading()
  334.  if (message != "") {
  335.   wx.showLoading({
  336.   title: message
  337.   })
  338.  }
  339.  var timestamp = Date.parse(new Date());
  340.  timestamp = timestamp / 1000;
  341.  params['openid'] = wx.getStorageSync('openid');
  342.  var newParams = this.objKeySort(params);
  343.  newParams['unionid'] = wx.getStorageSync('unionid');
  344.  newParams['antime'] = timestamp;
  345.  newParams['key'] = this.jiamiParams(newParams);
  346.  wx.request({
  347.   url: url,
  348.   data: newParams,
  349.   header: {
  350.   'content-type': 'application/x-www-form-urlencoded'
  351.   },
  352.   method: 'post',
  353.   success: function (res) {
  354.  
  355.   wx.hideNavigationBarLoading()
  356.   if (message != "") {
  357.    wx.hideLoading()
  358.   }
  359.  
  360.   if (res.statusCode == 200) {
  361.    resolve(res.data)
  362.   } else {
  363.    reject(res)
  364.   }
  365.   },
  366.   fail: function (res) {
  367.   wx.hideNavigationBarLoading()
  368.   if (message != "") {
  369.    wx.hideLoading()
  370.   }
  371.   reject('网络出错！')
  372.   }
  373.  })
  374.  
  375.  
  376.  })
  377.  return promise
  378. }
  379.  
  380. module.exports = {
  381.  http: http,
  382.  formatTime: formatTime,
  383.  requestLoading: requestLoading,
  384.  tiaozhuan: tiaozhuan,
  385.  tiaozhuanAd: tiaozhuanAd,
  386.  objKeySort: objKeySort,
  387.  jiamiParams: jiamiParams
  388. }

这个工具函数中用promise封装了微信小程序数据请求的方法：单独拿出来（但不能单独使用哦，因为还需要借助上面的一些工具函数）

  1. function requestLoading(url, params, message) {
  2.  let promise = new Promise((resolve, reject) => {
  3.  wx.showNavigationBarLoading()
  4.  if (message != "") {
  5.   wx.showLoading({
  6.   title: message
  7.   })
  8.  }
  9.  var timestamp = Date.parse(new Date());
  10.  timestamp = timestamp / 1000;
  11.  params['openid'] = wx.getStorageSync('openid');
  12.  var newParams = this.objKeySort(params);
  13.  newParams['unionid'] = wx.getStorageSync('unionid');
  14.  newParams['antime'] = timestamp;
  15.  newParams['key'] = this.jiamiParams(newParams);
  16.  wx.request({
  17.   url: url,
  18.   data: newParams,
  19.   header: {
  20.   'content-type': 'application/x-www-form-urlencoded'
  21.   },
  22.   method: 'post',
  23.   success: function (res) {
  24.  
  25.   wx.hideNavigationBarLoading()
  26.   if (message != "") {
  27.    wx.hideLoading()
  28.   }
  29.  
  30.   if (res.statusCode == 200) {
  31.    resolve(res.data)
  32.   } else {
  33.    reject(res)
  34.   }
  35.   },
  36.   fail: function (res) {
  37.   wx.hideNavigationBarLoading()
  38.   if (message != "") {
  39.    wx.hideLoading()
  40.   }
  41.   reject('网络出错！')
  42.   }
  43.  })
  44.  
  45.  
  46.  })
  47.  return promise
  48. }

使用方法：

  1. util1.requestLoading(url, param, "正在加载数据").then(res => {
  2.   if (res.status == 1) {
  3.   let bannerList = res.data
  4.   that.setData({
  5.    bannerList
  6.   });
  7.   }
  8.  }).catch(()=>{
  9.   wx.showToast({
  10.   title: '加载数据失败',
  11.   })
  12.  })

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持w3xue。

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