微信小程序工具函数封装的示例分析
这篇文章主要介绍微信小程序工具函数封装的示例分析,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
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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', }) })
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