微信小程序工具函数封装

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

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(':')
}

const formatNumber = n => {
 n = n.toString()
 return n[1] ? n : '0' + n
}

function http(url, callback) {
 var that = this;
 wx.request({
 url: url,
 success: function (res) {
  callback(res.data.data);
 }
 })
}

function processMasterData(data) {
 return data;
}

function jiamiParams(obj) {
 var str = '';
 var newKey = Object.values(obj);

 for (var i = 0; i < newKey.length; i++) {
 str += newKey[i];
 }
 return md5(str + 'yueduqiyuan');
}

function tiaozhuanAd(leixing, id) {
 switch (leixing) {
 case 1:
  wx.navigateTo({
  url: 'book-detail/book-detail?id=' + id,
  });
  break;

 case 2:
  wx.navigateTo({
  url: '../page-url/page-url?url=' + id,
  });
  break;
 case 3:
  wx.navigateTo({
  url: 'index-searchresult/index-searchresult?key=' + id,
  });
  break;

 case 4:
  wx.navigateTo({
  url: 'famous-master/famous-master?id=' + id,
  });
  break;

 case 5:
  break;

 }

}

function tiaozhuan(leixing, id) {
 switch (leixing) {
 case 1:
  wx.navigateTo({
  url: '../heji-list/heji-list?category=' + id,
  });
  break;
 case 2:
  wx.navigateTo({
  url: '../heji-list/heji-list?category=' + id,
  });
  break;
 case 3:
  wx.navigateTo({
  url: '../page-url/page-url?url=' + id,
  });
  break;
 case 4:
  wx.navigateTo({
  url: '../famous-master/famous-master?id=' + id,
  });
  break;
 case 5:
  wx.navigateTo({
  url: '../heji-list/heji-list?age=' + id,
  });
  break;
 case 6:
  wx.navigateTo({
  url: '../hotbook/hotbook?typename=新到图书',
  });
  break;
 case 7:
  wx.navigateTo({
  url: '../hotbook/hotbook?typename=热门图书',
  });
  break;

 case "8888":
  wx.navigateTo({
  url: '../hotbook/hotbook?typename=' + id,
  });
  break;
 case "9999":
  {
  wx.navigateTo({
   url: '../book-detail/book-detail?id=' + id,
  });
  break;
  }
 }

}

/**
 * 二位数组键名排序
 */
function objKeySort(obj) {
 var newkey = Object.keys(obj).sort();
 var newObj = {};
 for (var i = 0; i < newkey.length; i++) {
 newObj[newkey[i]] = obj[newkey[i]];
 }
 return newObj;
}

function md5(string) {
 var x = Array();
 var k, AA, BB, CC, DD, a, b, c, d;
 var S11 = 7, S12 = 12, S13 = 17, S14 = 22;
 var S21 = 5, S22 = 9, S23 = 14, S24 = 20;
 var S31 = 4, S32 = 11, S33 = 16, S34 = 23;
 var S41 = 6, S42 = 10, S43 = 15, S44 = 21;
 string = Utf8Encode(string);
 x = ConvertToWordArray(string);
 a = 0x67452301;
 b = 0xEFCDAB89;
 c = 0x98BADCFE;
 d = 0x10325476;
 for (k = 0; k < x.length; k += 16) {
 AA = a;
 BB = b;
 CC = c;
 DD = d;
 a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
 d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
 c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
 b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
 a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
 d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
 c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
 b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
 a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
 d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
 c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
 b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
 a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
 d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
 c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
 b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
 a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
 d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
 c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
 b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
 a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
 d = GG(d, a, b, c, x[k + 10], S22, 0x2441453);
 c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
 b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
 a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
 d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
 c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
 b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
 a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
 d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
 c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
 b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
 a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
 d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
 c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
 b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
 a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
 d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
 c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
 b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
 a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
 d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
 c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
 b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
 a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
 d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
 c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
 b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
 a = II(a, b, c, d, x[k + 0], S41, 0xF4292244);
 d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
 c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
 b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
 a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
 d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
 c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
 b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
 a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
 d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
 c = II(c, d, a, b, x[k + 6], S43, 0xA3014314);
 b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
 a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
 d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
 c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
 b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
 a = AddUnsigned(a, AA);
 b = AddUnsigned(b, BB);
 c = AddUnsigned(c, CC);
 d = AddUnsigned(d, DD);
 }
 var temp = WordToHex(a) + WordToHex(b) + WordToHex(c) + WordToHex(d);
 return temp.toUpperCase();
}
function RotateLeft(lValue, iShiftBits) {
 return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
}
function AddUnsigned(lX, lY) {
 var lX4, lY4, lX8, lY8, lResult;
 lX8 = (lX & 0x80000000);
 lY8 = (lY & 0x80000000);
 lX4 = (lX & 0x40000000);
 lY4 = (lY & 0x40000000);
 lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
 if (lX4 & lY4) {
 return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
 }
 if (lX4 | lY4) {
 if (lResult & 0x40000000) {
  return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
 } else {
  return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
 }
 } else {
 return (lResult ^ lX8 ^ lY8);
 }
}
function F(x, y, z) {
 return (x & y) | ((~x) & z);
}
function G(x, y, z) {
 return (x & z) | (y & (~z));
}
function H(x, y, z) {
 return (x ^ y ^ z);
}
function I(x, y, z) {
 return (y ^ (x | (~z)));
}
function FF(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
}
function GG(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
}
function HH(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
}
function II(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
}
function ConvertToWordArray(string) {
 var lWordCount;
 var lMessageLength = string.length;
 var lNumberOfWords_temp1 = lMessageLength + 8;
 var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
 var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
 var lWordArray = Array(lNumberOfWords - 1);
 var lBytePosition = 0;
 var lByteCount = 0;
 while (lByteCount < lMessageLength) {
 lWordCount = (lByteCount - (lByteCount % 4)) / 4;
 lBytePosition = (lByteCount % 4) * 8;
 lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
 lByteCount++;
 }
 lWordCount = (lByteCount - (lByteCount % 4)) / 4;
 lBytePosition = (lByteCount % 4) * 8;
 lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
 lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
 lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
 return lWordArray;
}
function WordToHex(lValue) {
 var WordToHexValue = "", WordToHexValue_temp = "", lByte, lCount;
 for (lCount = 0; lCount <= 3; lCount++) {
 lByte = (lValue >>> (lCount * 8)) & 255;
 WordToHexValue_temp = "0" + lByte.toString(16);
 WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2);
 }
 return WordToHexValue;
}
function Utf8Encode(string) {
 var utftext = "";
 for (var n = 0; n < string.length; n++) {
 var c = string.charCodeAt(n);
 if (c < 128) {
  utftext += String.fromCharCode(c);
 } else if ((c > 127) && (c < 2048)) {
  utftext += String.fromCharCode((c >> 6) | 192);
  utftext += String.fromCharCode((c & 63) | 128);
 } else {
  utftext += String.fromCharCode((c >> 12) | 224);
  utftext += String.fromCharCode(((c >> 6) & 63) | 128);
  utftext += String.fromCharCode((c & 63) | 128);
 }
 }
 return utftext;
}
function requestLoading(url, params, message) {
 let promise = new Promise((resolve, reject) => {
 wx.showNavigationBarLoading()
 if (message != "") {
  wx.showLoading({
  title: message
  })
 }
 var timestamp = Date.parse(new Date());
 timestamp = timestamp / 1000;
 params['openid'] = wx.getStorageSync('openid');
 var newParams = this.objKeySort(params);
 newParams['unionid'] = wx.getStorageSync('unionid');
 newParams['antime'] = timestamp;
 newParams['key'] = this.jiamiParams(newParams);
 wx.request({
  url: url,
  data: newParams,
  header: {
  'content-type': 'application/x-www-form-urlencoded'
  },
  method: 'post',
  success: function (res) {

  wx.hideNavigationBarLoading()
  if (message != "") {
   wx.hideLoading()
  }

  if (res.statusCode == 200) {
   resolve(res.data)
  } else {
   reject(res)
  }
  },
  fail: function (res) {
  wx.hideNavigationBarLoading()
  if (message != "") {
   wx.hideLoading()
  }
  reject('网络出错！')
  }
 })

 })
 return promise
}

module.exports = {
 http: http,
 formatTime: formatTime,
 requestLoading: requestLoading,
 tiaozhuan: tiaozhuan,
 tiaozhuanAd: tiaozhuanAd,
 objKeySort: objKeySort,
 jiamiParams: jiamiParams
}

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）

function requestLoading(url, params, message) {
 let promise = new Promise((resolve, reject) => {
 wx.showNavigationBarLoading()
 if (message != "") {
  wx.showLoading({
  title: message
  })
 }
 var timestamp = Date.parse(new Date());
 timestamp = timestamp / 1000;
 params['openid'] = wx.getStorageSync('openid');
 var newParams = this.objKeySort(params);
 newParams['unionid'] = wx.getStorageSync('unionid');
 newParams['antime'] = timestamp;
 newParams['key'] = this.jiamiParams(newParams);
 wx.request({
  url: url,
  data: newParams,
  header: {
  'content-type': 'application/x-www-form-urlencoded'
  },
  method: 'post',
  success: function (res) {

  wx.hideNavigationBarLoading()
  if (message != "") {
   wx.hideLoading()
  }

  if (res.statusCode == 200) {
   resolve(res.data)
  } else {
   reject(res)
  }
  },
  fail: function (res) {
  wx.hideNavigationBarLoading()
  if (message != "") {
   wx.hideLoading()
  }
  reject('网络出错！')
  }
 })

 })
 return promise
}

使用方法：

util1.requestLoading(url, param, "正在加载数据").then(res => {
  if (res.status == 1) {
  let bannerList = res.data
  that.setData({
   bannerList
  });
  }
 }).catch(()=>{
  wx.showToast({
  title: '加载数据失败',
  })
 }) 

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我们。