uniapp 微信小程序生成二维码
<view class="qr-box"> <canvas canvas-id="qrcode" style="width: 340rpx;height: 340rpx;;margin: 0 auto;" /> </view>
<script> import uQRCode from '@/common/uqrcode.js' //引入uqrcode.js export default { data() { return { } }, onLoad(options) { let url = 'customerId=1' this.qrCode(url) }, methods: { qrCode(url) { this.qrShow = true uQRCode.make({ canvasId: 'qrcode', componentInstance: this, text: url, size: 170, margin: 0, backgroundColor: '#ffffff', foregroundColor: '#000000', fileType: 'jpg', errorCorrectLevel: uQRCode.errorCorrectLevel.H, success: res => {} }) } } } </script>
.qr-box { width: 400rpx; height: 460rpx; margin: 0 auto; margin-top: 150rpx; }
uqrcode.js
// uqrcode.js //--------------------------------------------------------------------- // github https://github.com/Sansnn/uQRCode //--------------------------------------------------------------------- let uQRCode = {}; (function() { //--------------------------------------------------------------------- // QRCode for JavaScript // // Copyright (c) 2009 Kazuhiko Arase // // URL: http://www.d-project.com/ // // Licensed under the MIT license: // http://www.opensource.org/licenses/mit-license.php // // The word "QR Code" is registered trademark of // DENSO WAVE INCORPORATED // http://www.denso-wave.com/qrcode/faqpatent-e.html // //--------------------------------------------------------------------- //--------------------------------------------------------------------- // QR8bitByte //--------------------------------------------------------------------- function QR8bitByte(data) { this.mode = QRMode.MODE_8BIT_BYTE; this.data = data; } QR8bitByte.prototype = { getLength: function(buffer) { return this.data.length; }, write: function(buffer) { for (var i = 0; i < this.data.length; i++) { // not JIS ... buffer.put(this.data.charCodeAt(i), 8); } } }; //--------------------------------------------------------------------- // QRCode //--------------------------------------------------------------------- function QRCode(typeNumber, errorCorrectLevel) { this.typeNumber = typeNumber; this.errorCorrectLevel = errorCorrectLevel; this.modules = null; this.moduleCount = 0; this.dataCache = null; this.dataList = new Array(); } QRCode.prototype = { addData: function(data) { var newData = new QR8bitByte(data); this.dataList.push(newData); this.dataCache = null; }, isDark: function(row, col) { if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) { throw new Error(row + "," + col); } return this.modules[row][col]; }, getModuleCount: function() { return this.moduleCount; }, make: function() { // Calculate automatically typeNumber if provided is < 1 if (this.typeNumber < 1) { var typeNumber = 1; for (typeNumber = 1; typeNumber < 40; typeNumber++) { var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, this.errorCorrectLevel); var buffer = new QRBitBuffer(); var totalDataCount = 0; for (var i = 0; i < rsBlocks.length; i++) { totalDataCount += rsBlocks[i].dataCount; } for (var i = 0; i < this.dataList.length; i++) { var data = this.dataList[i]; buffer.put(data.mode, 4); buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber)); data.write(buffer); } if (buffer.getLengthInBits() <= totalDataCount * 8) break; } this.typeNumber = typeNumber; } this.makeImpl(false, this.getBestMaskPattern()); }, makeImpl: function(test, maskPattern) { this.moduleCount = this.typeNumber * 4 + 17; this.modules = new Array(this.moduleCount); for (var row = 0; row < this.moduleCount; row++) { this.modules[row] = new Array(this.moduleCount); for (var col = 0; col < this.moduleCount; col++) { this.modules[row][col] = null; //(col + row) % 3; } } this.setupPositionProbePattern(0, 0); this.setupPositionProbePattern(this.moduleCount - 7, 0); this.setupPositionProbePattern(0, this.moduleCount - 7); this.setupPositionAdjustPattern(); this.setupTimingPattern(); this.setupTypeInfo(test, maskPattern); if (this.typeNumber >= 7) { this.setupTypeNumber(test); } if (this.dataCache == null) { this.dataCache = QRCode.createData(this.typeNumber, this.errorCorrectLevel, this.dataList); } this.mapData(this.dataCache, maskPattern); }, setupPositionProbePattern: function(row, col) { for (var r = -1; r <= 7; r++) { if (row + r <= -1 || this.moduleCount <= row + r) continue; for (var c = -1; c <= 7; c++) { if (col + c <= -1 || this.moduleCount <= col + c) continue; if ((0 <= r && r <= 6 && (c == 0 || c == 6)) || (0 <= c && c <= 6 && (r == 0 || r == 6)) || (2 <= r && r <= 4 && 2 <= c && c <= 4)) { this.modules[row + r][col + c] = true; } else { this.modules[row + r][col + c] = false; } } } }, getBestMaskPattern: function() { var minLostPoint = 0; var pattern = 0; for (var i = 0; i < 8; i++) { this.makeImpl(true, i); var lostPoint = QRUtil.getLostPoint(this); if (i == 0 || minLostPoint > lostPoint) { minLostPoint = lostPoint; pattern = i; } } return pattern; }, createMovieClip: function(target_mc, instance_name, depth) { var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth); var cs = 1; this.make(); for (var row = 0; row < this.modules.length; row++) { var y = row * cs; for (var col = 0; col < this.modules[row].length; col++) { var x = col * cs; var dark = this.modules[row][col]; if (dark) { qr_mc.beginFill(0, 100); qr_mc.moveTo(x, y); qr_mc.lineTo(x + cs, y); qr_mc.lineTo(x + cs, y + cs); qr_mc.lineTo(x, y + cs); qr_mc.endFill(); } } } return qr_mc; }, setupTimingPattern: function() { for (var r = 8; r < this.moduleCount - 8; r++) { if (this.modules[r][6] != null) { continue; } this.modules[r][6] = (r % 2 == 0); } for (var c = 8; c < this.moduleCount - 8; c++) { if (this.modules[6][c] != null) { continue; } this.modules[6][c] = (c % 2 == 0); } }, setupPositionAdjustPattern: function() { var pos = QRUtil.getPatternPosition(this.typeNumber); for (var i = 0; i < pos.length; i++) { for (var j = 0; j < pos.length; j++) { var row = pos[i]; var col = pos[j]; if (this.modules[row][col] != null) { continue; } for (var r = -2; r <= 2; r++) { for (var c = -2; c <= 2; c++) { if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) { this.modules[row + r][col + c] = true; } else { this.modules[row + r][col + c] = false; } } } } } }, setupTypeNumber: function(test) { var bits = QRUtil.getBCHTypeNumber(this.typeNumber); for (var i = 0; i < 18; i++) { var mod = (!test && ((bits >> i) & 1) == 1); this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod; } for (var i = 0; i < 18; i++) { var mod = (!test && ((bits >> i) & 1) == 1); this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod; } }, setupTypeInfo: function(test, maskPattern) { var data = (this.errorCorrectLevel << 3) | maskPattern; var bits = QRUtil.getBCHTypeInfo(data); // vertical for (var i = 0; i < 15; i++) { var mod = (!test && ((bits >> i) & 1) == 1); if (i < 6) { this.modules[i][8] = mod; } else if (i < 8) { this.modules[i + 1][8] = mod; } else { this.modules[this.moduleCount - 15 + i][8] = mod; } } // horizontal for (var i = 0; i < 15; i++) { var mod = (!test && ((bits >> i) & 1) == 1); if (i < 8) { this.modules[8][this.moduleCount - i - 1] = mod; } else if (i < 9) { this.modules[8][15 - i - 1 + 1] = mod; } else { this.modules[8][15 - i - 1] = mod; } } // fixed module this.modules[this.moduleCount - 8][8] = (!test); }, mapData: function(data, maskPattern) { var inc = -1; var row = this.moduleCount - 1; var bitIndex = 7; var byteIndex = 0; for (var col = this.moduleCount - 1; col > 0; col -= 2) { if (col == 6) col--; while (true) { for (var c = 0; c < 2; c++) { if (this.modules[row][col - c] == null) { var dark = false; if (byteIndex < data.length) { dark = (((data[byteIndex] >>> bitIndex) & 1) == 1); } var mask = QRUtil.getMask(maskPattern, row, col - c); if (mask) { dark = !dark; } this.modules[row][col - c] = dark; bitIndex--; if (bitIndex == -1) { byteIndex++; bitIndex = 7; } } } row += inc; if (row < 0 || this.moduleCount <= row) { row -= inc; inc = -inc; break; } } } } }; QRCode.PAD0 = 0xEC; QRCode.PAD1 = 0x11; QRCode.createData = function(typeNumber, errorCorrectLevel, dataList) { var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel); var buffer = new QRBitBuffer(); for (var i = 0; i < dataList.length; i++) { var data = dataList[i]; buffer.put(data.mode, 4); buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber)); data.write(buffer); } // calc num max data. var totalDataCount = 0; for (var i = 0; i < rsBlocks.length; i++) { totalDataCount += rsBlocks[i].dataCount; } if (buffer.getLengthInBits() > totalDataCount * 8) { throw new Error("code length overflow. (" + buffer.getLengthInBits() + ">" + totalDataCount * 8 + ")"); } // end code if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) { buffer.put(0, 4); } // padding while (buffer.getLengthInBits() % 8 != 0) { buffer.putBit(false); } // padding while (true) { if (buffer.getLengthInBits() >= totalDataCount * 8) { break; } buffer.put(QRCode.PAD0, 8); if (buffer.getLengthInBits() >= totalDataCount * 8) { break; } buffer.put(QRCode.PAD1, 8); } return QRCode.createBytes(buffer, rsBlocks); } QRCode.createBytes = function(buffer, rsBlocks) { var offset = 0; var maxDcCount = 0; var maxEcCount = 0; var dcdata = new Array(rsBlocks.length); var ecdata = new Array(rsBlocks.length); for (var r = 0; r < rsBlocks.length; r++) { var dcCount = rsBlocks[r].dataCount; var ecCount = rsBlocks[r].totalCount - dcCount; maxDcCount = Math.max(maxDcCount, dcCount); maxEcCount = Math.max(maxEcCount, ecCount); dcdata[r] = new Array(dcCount); for (var i = 0; i < dcdata[r].length; i++) { dcdata[r][i] = 0xff & buffer.buffer[i + offset]; } offset += dcCount; var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount); var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1); var modPoly = rawPoly.mod(rsPoly); ecdata[r] = new Array(rsPoly.getLength() - 1); for (var i = 0; i < ecdata[r].length; i++) { var modIndex = i + modPoly.getLength() - ecdata[r].length; ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0; } } var totalCodeCount = 0; for (var i = 0; i < rsBlocks.length; i++) { totalCodeCount += rsBlocks[i].totalCount; } var data = new Array(totalCodeCount); var index = 0; for (var i = 0; i < maxDcCount; i++) { for (var r = 0; r < rsBlocks.length; r++) { if (i < dcdata[r].length) { data[index++] = dcdata[r][i]; } } } for (var i = 0; i < maxEcCount; i++) { for (var r = 0; r < rsBlocks.length; r++) { if (i < ecdata[r].length) { data[index++] = ecdata[r][i]; } } } return data; } //--------------------------------------------------------------------- // QRMode //--------------------------------------------------------------------- var QRMode = { MODE_NUMBER: 1 << 0, MODE_ALPHA_NUM: 1 << 1, MODE_8BIT_BYTE: 1 << 2, MODE_KANJI: 1 << 3 }; //--------------------------------------------------------------------- // QRErrorCorrectLevel //--------------------------------------------------------------------- var QRErrorCorrectLevel = { L: 1, M: 0, Q: 3, H: 2 }; //--------------------------------------------------------------------- // QRMaskPattern //--------------------------------------------------------------------- var QRMaskPattern = { PATTERN000: 0, PATTERN001: 1, PATTERN010: 2, PATTERN011: 3, PATTERN100: 4, PATTERN101: 5, PATTERN110: 6, PATTERN111: 7 }; //--------------------------------------------------------------------- // QRUtil //--------------------------------------------------------------------- var QRUtil = { PATTERN_POSITION_TABLE: [ [], [6, 18], [6, 22], [6, 26], [6, 30], [6, 34], [6, 22, 38], [6, 24, 42], [6, 26, 46], [6, 28, 50], [6, 30, 54], [6, 32, 58], [6, 34, 62], [6, 26, 46, 66], [6, 26, 48, 70], [6, 26, 50, 74], [6, 30, 54, 78], [6, 30, 56, 82], [6, 30, 58, 86], [6, 34, 62, 90], [6, 28, 50, 72, 94], [6, 26, 50, 74, 98], [6, 30, 54, 78, 102], [6, 28, 54, 80, 106], [6, 32, 58, 84, 110], [6, 30, 58, 86, 114], [6, 34, 62, 90, 118], [6, 26, 50, 74, 98, 122], [6, 30, 54, 78, 102, 126], [6, 26, 52, 78, 104, 130], [6, 30, 56, 82, 108, 134], [6, 34, 60, 86, 112, 138], [6, 30, 58, 86, 114, 142], [6, 34, 62, 90, 118, 146], [6, 30, 54, 78, 102, 126, 150], [6, 24, 50, 76, 102, 128, 154], [6, 28, 54, 80, 106, 132, 158], [6, 32, 58, 84, 110, 136, 162], [6, 26, 54, 82, 110, 138, 166], [6, 30, 58, 86, 114, 142, 170] ], G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0), G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0), G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1), getBCHTypeInfo: function(data) { var d = data << 10; while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) { d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15))); } return ((data << 10) | d) ^ QRUtil.G15_MASK; }, getBCHTypeNumber: function(data) { var d = data << 12; while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) { d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18))); } return (data << 12) | d; }, getBCHDigit: function(data) { var digit = 0; while (data != 0) { digit++; data >>>= 1; } return digit; }, getPatternPosition: function(typeNumber) { return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]; }, getMask: function(maskPattern, i, j) { switch (maskPattern) { case QRMaskPattern.PATTERN000: return (i + j) % 2 == 0; case QRMaskPattern.PATTERN001: return i % 2 == 0; case QRMaskPattern.PATTERN010: return j % 3 == 0; case QRMaskPattern.PATTERN011: return (i + j) % 3 == 0; case QRMaskPattern.PATTERN100: return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0; case QRMaskPattern.PATTERN101: return (i * j) % 2 + (i * j) % 3 == 0; case QRMaskPattern.PATTERN110: return ((i * j) % 2 + (i * j) % 3) % 2 == 0; case QRMaskPattern.PATTERN111: return ((i * j) % 3 + (i + j) % 2) % 2 == 0; default: throw new Error("bad maskPattern:" + maskPattern); } }, getErrorCorrectPolynomial: function(errorCorrectLength) { var a = new QRPolynomial([1], 0); for (var i = 0; i < errorCorrectLength; i++) { a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0)); } return a; }, getLengthInBits: function(mode, type) { if (1 <= type && type < 10) { // 1 - 9 switch (mode) { case QRMode.MODE_NUMBER: return 10; case QRMode.MODE_ALPHA_NUM: return 9; case QRMode.MODE_8BIT_BYTE: return 8; case QRMode.MODE_KANJI: return 8; default: throw new Error("mode:" + mode); } } else if (type < 27) { // 10 - 26 switch (mode) { case QRMode.MODE_NUMBER: return 12; case QRMode.MODE_ALPHA_NUM: return 11; case QRMode.MODE_8BIT_BYTE: return 16; case QRMode.MODE_KANJI: return 10; default: throw new Error("mode:" + mode); } } else if (type < 41) { // 27 - 40 switch (mode) { case QRMode.MODE_NUMBER: return 14; case QRMode.MODE_ALPHA_NUM: return 13; case QRMode.MODE_8BIT_BYTE: return 16; case QRMode.MODE_KANJI: return 12; default: throw new Error("mode:" + mode); } } else { throw new Error("type:" + type); } }, getLostPoint: function(qrCode) { var moduleCount = qrCode.getModuleCount(); var lostPoint = 0; // LEVEL1 for (var row = 0; row < moduleCount; row++) { for (var col = 0; col < moduleCount; col++) { var sameCount = 0; var dark = qrCode.isDark(row, col); for (var r = -1; r <= 1; r++) { if (row + r < 0 || moduleCount <= row + r) { continue; } for (var c = -1; c <= 1; c++) { if (col + c < 0 || moduleCount <= col + c) { continue; } if (r == 0 && c == 0) { continue; } if (dark == qrCode.isDark(row + r, col + c)) { sameCount++; } } } if (sameCount > 5) { lostPoint += (3 + sameCount - 5); } } } // LEVEL2 for (var row = 0; row < moduleCount - 1; row++) { for (var col = 0; col < moduleCount - 1; col++) { var count = 0; if (qrCode.isDark(row, col)) count++; if (qrCode.isDark(row + 1, col)) count++; if (qrCode.isDark(row, col + 1)) count++; if (qrCode.isDark(row + 1, col + 1)) count++; if (count == 0 || count == 4) { lostPoint += 3; } } } // LEVEL3 for (var row = 0; row < moduleCount; row++) { for (var col = 0; col < moduleCount - 6; col++) { if (qrCode.isDark(row, col) && !qrCode.isDark(row, col + 1) && qrCode.isDark(row, col + 2) && qrCode.isDark(row, col + 3) && qrCode.isDark(row, col + 4) && !qrCode.isDark(row, col + 5) && qrCode.isDark(row, col + 6)) { lostPoint += 40; } } } for (var col = 0; col < moduleCount; col++) { for (var row = 0; row < moduleCount - 6; row++) { if (qrCode.isDark(row, col) && !qrCode.isDark(row + 1, col) && qrCode.isDark(row + 2, col) && qrCode.isDark(row + 3, col) && qrCode.isDark(row + 4, col) && !qrCode.isDark(row + 5, col) && qrCode.isDark(row + 6, col)) { lostPoint += 40; } } } // LEVEL4 var darkCount = 0; for (var col = 0; col < moduleCount; col++) { for (var row = 0; row < moduleCount; row++) { if (qrCode.isDark(row, col)) { darkCount++; } } } var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; lostPoint += ratio * 10; return lostPoint; } }; //--------------------------------------------------------------------- // QRMath //--------------------------------------------------------------------- var QRMath = { glog: function(n) { if (n < 1) { throw new Error("glog(" + n + ")"); } return QRMath.LOG_TABLE[n]; }, gexp: function(n) { while (n < 0) { n += 255; } while (n >= 256) { n -= 255; } return QRMath.EXP_TABLE[n]; }, EXP_TABLE: new Array(256), LOG_TABLE: new Array(256) }; for (var i = 0; i < 8; i++) { QRMath.EXP_TABLE[i] = 1 << i; } for (var i = 8; i < 256; i++) { QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8]; } for (var i = 0; i < 255; i++) { QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i; } //--------------------------------------------------------------------- // QRPolynomial //--------------------------------------------------------------------- function QRPolynomial(num, shift) { if (num.length == undefined) { throw new Error(num.length + "/" + shift); } var offset = 0; while (offset < num.length && num[offset] == 0) { offset++; } this.num = new Array(num.length - offset + shift); for (var i = 0; i < num.length - offset; i++) { this.num[i] = num[i + offset]; } } QRPolynomial.prototype = { get: function(index) { return this.num[index]; }, getLength: function() { return this.num.length; }, multiply: function(e) { var num = new Array(this.getLength() + e.getLength() - 1); for (var i = 0; i < this.getLength(); i++) { for (var j = 0; j < e.getLength(); j++) { num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j))); } } return new QRPolynomial(num, 0); }, mod: function(e) { if (this.getLength() - e.getLength() < 0) { return this; } var ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0)); var num = new Array(this.getLength()); for (var i = 0; i < this.getLength(); i++) { num[i] = this.get(i); } for (var i = 0; i < e.getLength(); i++) { num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio); } // recursive call return new QRPolynomial(num, 0).mod(e); } }; //--------------------------------------------------------------------- // QRRSBlock //--------------------------------------------------------------------- function QRRSBlock(totalCount, dataCount) { this.totalCount = totalCount; this.dataCount = dataCount; } QRRSBlock.RS_BLOCK_TABLE = [ // L // M // Q // H // 1 [1, 26, 19], [1, 26, 16], [1, 26, 13], [1, 26, 9], // 2 [1, 44, 34], [1, 44, 28], [1, 44, 22], [1, 44, 16], // 3 [1, 70, 55], [1, 70, 44], [2, 35, 17], [2, 35, 13], // 4 [1, 100, 80], [2, 50, 32], [2, 50, 24], [4, 25, 9], // 5 [1, 134, 108], [2, 67, 43], [2, 33, 15, 2, 34, 16], [2, 33, 11, 2, 34, 12], // 6 [2, 86, 68], [4, 43, 27], [4, 43, 19], [4, 43, 15], // 7 [2, 98, 78], [4, 49, 31], [2, 32, 14, 4, 33, 15], [4, 39, 13, 1, 40, 14], // 8 [2, 121, 97], [2, 60, 38, 2, 61, 39], [4, 40, 18, 2, 41, 19], [4, 40, 14, 2, 41, 15], // 9 [2, 146, 116], [3, 58, 36, 2, 59, 37], [4, 36, 16, 4, 37, 17], [4, 36, 12, 4, 37, 13], // 10 [2, 86, 68, 2, 87, 69], [4, 69, 43, 1, 70, 44], [6, 43, 19, 2, 44, 20], [6, 43, 15, 2, 44, 16], // 11 [4, 101, 81], [1, 80, 50, 4, 81, 51], [4, 50, 22, 4, 51, 23], [3, 36, 12, 8, 37, 13], // 12 [2, 116, 92, 2, 117, 93], [6, 58, 36, 2, 59, 37], [4, 46, 20, 6, 47, 21], [7, 42, 14, 4, 43, 15], // 13 [4, 133, 107], [8, 59, 37, 1, 60, 38], [8, 44, 20, 4, 45, 21], [12, 33, 11, 4, 34, 12], // 14 [3, 145, 115, 1, 146, 116], [4, 64, 40, 5, 65, 41], [11, 36, 16, 5, 37, 17], [11, 36, 12, 5, 37, 13], // 15 [5, 109, 87, 1, 110, 88], [5, 65, 41, 5, 66, 42], [5, 54, 24, 7, 55, 25], [11, 36, 12], // 16 [5, 122, 98, 1, 123, 99], [7, 73, 45, 3, 74, 46], [15, 43, 19, 2, 44, 20], [3, 45, 15, 13, 46, 16], // 17 [1, 135, 107, 5, 136, 108], [10, 74, 46, 1, 75, 47], [1, 50, 22, 15, 51, 23], [2, 42, 14, 17, 43, 15], // 18 [5, 150, 120, 1, 151, 121], [9, 69, 43, 4, 70, 44], [17, 50, 22, 1, 51, 23], [2, 42, 14, 19, 43, 15], // 19 [3, 141, 113, 4, 142, 114], [3, 70, 44, 11, 71, 45], [17, 47, 21, 4, 48, 22], [9, 39, 13, 16, 40, 14], // 20 [3, 135, 107, 5, 136, 108], [3, 67, 41, 13, 68, 42], [15, 54, 24, 5, 55, 25], [15, 43, 15, 10, 44, 16], // 21 [4, 144, 116, 4, 145, 117], [17, 68, 42], [17, 50, 22, 6, 51, 23], [19, 46, 16, 6, 47, 17], // 22 [2, 139, 111, 7, 140, 112], [17, 74, 46], [7, 54, 24, 16, 55, 25], [34, 37, 13], // 23 [4, 151, 121, 5, 152, 122], [4, 75, 47, 14, 76, 48], [11, 54, 24, 14, 55, 25], [16, 45, 15, 14, 46, 16], // 24 [6, 147, 117, 4, 148, 118], [6, 73, 45, 14, 74, 46], [11, 54, 24, 16, 55, 25], [30, 46, 16, 2, 47, 17], // 25 [8, 132, 106, 4, 133, 107], [8, 75, 47, 13, 76, 48], [7, 54, 24, 22, 55, 25], [22, 45, 15, 13, 46, 16], // 26 [10, 142, 114, 2, 143, 115], [19, 74, 46, 4, 75, 47], [28, 50, 22, 6, 51, 23], [33, 46, 16, 4, 47, 17], // 27 [8, 152, 122, 4, 153, 123], [22, 73, 45, 3, 74, 46], [8, 53, 23, 26, 54, 24], [12, 45, 15, 28, 46, 16], // 28 [3, 147, 117, 10, 148, 118], [3, 73, 45, 23, 74, 46], [4, 54, 24, 31, 55, 25], [11, 45, 15, 31, 46, 16], // 29 [7, 146, 116, 7, 147, 117], [21, 73, 45, 7, 74, 46], [1, 53, 23, 37, 54, 24], [19, 45, 15, 26, 46, 16], // 30 [5, 145, 115, 10, 146, 116], [19, 75, 47, 10, 76, 48], [15, 54, 24, 25, 55, 25], [23, 45, 15, 25, 46, 16], // 31 [13, 145, 115, 3, 146, 116], [2, 74, 46, 29, 75, 47], [42, 54, 24, 1, 55, 25], [23, 45, 15, 28, 46, 16], // 32 [17, 145, 115], [10, 74, 46, 23, 75, 47], [10, 54, 24, 35, 55, 25], [19, 45, 15, 35, 46, 16], // 33 [17, 145, 115, 1, 146, 116], [14, 74, 46, 21, 75, 47], [29, 54, 24, 19, 55, 25], [11, 45, 15, 46, 46, 16], // 34 [13, 145, 115, 6, 146, 116], [14, 74, 46, 23, 75, 47], [44, 54, 24, 7, 55, 25], [59, 46, 16, 1, 47, 17], // 35 [12, 151, 121, 7, 152, 122], [12, 75, 47, 26, 76, 48], [39, 54, 24, 14, 55, 25], [22, 45, 15, 41, 46, 16], // 36 [6, 151, 121, 14, 152, 122], [6, 75, 47, 34, 76, 48], [46, 54, 24, 10, 55, 25], [2, 45, 15, 64, 46, 16], // 37 [17, 152, 122, 4, 153, 123], [29, 74, 46, 14, 75, 47], [49, 54, 24, 10, 55, 25], [24, 45, 15, 46, 46, 16], // 38 [4, 152, 122, 18, 153, 123], [13, 74, 46, 32, 75, 47], [48, 54, 24, 14, 55, 25], [42, 45, 15, 32, 46, 16], // 39 [20, 147, 117, 4, 148, 118], [40, 75, 47, 7, 76, 48], [43, 54, 24, 22, 55, 25], [10, 45, 15, 67, 46, 16], // 40 [19, 148, 118, 6, 149, 119], [18, 75, 47, 31, 76, 48], [34, 54, 24, 34, 55, 25], [20, 45, 15, 61, 46, 16] ]; QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) { var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel); if (rsBlock == undefined) { throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel); } var length = rsBlock.length / 3; var list = new Array(); for (var i = 0; i < length; i++) { var count = rsBlock[i * 3 + 0]; var totalCount = rsBlock[i * 3 + 1]; var dataCount = rsBlock[i * 3 + 2]; for (var j = 0; j < count; j++) { list.push(new QRRSBlock(totalCount, dataCount)); } } return list; } QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) { switch (errorCorrectLevel) { case QRErrorCorrectLevel.L: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0]; case QRErrorCorrectLevel.M: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1]; case QRErrorCorrectLevel.Q: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2]; case QRErrorCorrectLevel.H: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3]; default: return undefined; } } //--------------------------------------------------------------------- // QRBitBuffer //--------------------------------------------------------------------- function QRBitBuffer() { this.buffer = new Array(); this.length = 0; } QRBitBuffer.prototype = { get: function(index) { var bufIndex = Math.floor(index / 8); return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1; }, put: function(num, length) { for (var i = 0; i < length; i++) { this.putBit(((num >>> (length - i - 1)) & 1) == 1); } }, getLengthInBits: function() { return this.length; }, putBit: function(bit) { var bufIndex = Math.floor(this.length / 8); if (this.buffer.length <= bufIndex) { this.buffer.push(0); } if (bit) { this.buffer[bufIndex] |= (0x80 >>> (this.length % 8)); } this.length++; } }; //--------------------------------------------------------------------- // Support Chinese //--------------------------------------------------------------------- function utf16To8(text) { var result = ''; var c; for (var i = 0; i < text.length; i++) { c = text.charCodeAt(i); if (c >= 0x0001 && c <= 0x007F) { result += text.charAt(i); } else if (c > 0x07FF) { result += String.fromCharCode(0xE0 | c >> 12 & 0x0F); result += String.fromCharCode(0x80 | c >> 6 & 0x3F); result += String.fromCharCode(0x80 | c >> 0 & 0x3F); } else { result += String.fromCharCode(0xC0 | c >> 6 & 0x1F); result += String.fromCharCode(0x80 | c >> 0 & 0x3F); } } return result; } uQRCode = { errorCorrectLevel: QRErrorCorrectLevel, defaults: { size: 354, margin: 0, backgroundColor: '#ffffff', foregroundColor: '#000000', fileType: 'png', // 'jpg', 'png' errorCorrectLevel: QRErrorCorrectLevel.H, typeNumber: -1 }, make: function(options) { return new Promise((reslove, reject) => { var defaultOptions = { canvasId: options.canvasId, componentInstance: options.componentInstance, text: options.text, size: this.defaults.size, margin: this.defaults.margin, backgroundColor: this.defaults.backgroundColor, foregroundColor: this.defaults.foregroundColor, fileType: this.defaults.fileType, errorCorrectLevel: this.defaults.errorCorrectLevel, typeNumber: this.defaults.typeNumber }; if (options) { for (var i in options) { defaultOptions[i] = options[i]; } } options = defaultOptions; if (!options.canvasId) { console.error('uQRCode: Please set canvasId!'); return; } function createCanvas() { var qrcode = new QRCode(options.typeNumber, options.errorCorrectLevel); qrcode.addData(utf16To8(options.text)); qrcode.make(); var ctx = uni.createCanvasContext(options.canvasId, options.componentInstance); ctx.setFillStyle(options.backgroundColor); ctx.fillRect(0, 0, options.size, options.size); var tileW = (options.size - options.margin * 2) / qrcode.getModuleCount(); var tileH = tileW; for (var row = 0; row < qrcode.getModuleCount(); row++) { for (var col = 0; col < qrcode.getModuleCount(); col++) { var style = qrcode.isDark(row, col) ? options.foregroundColor : options.backgroundColor; ctx.setFillStyle(style); var x = Math.round(col * tileW) + options.margin; var y = Math.round(row * tileH) + options.margin; var w = Math.ceil((col + 1) * tileW) - Math.floor(col * tileW); var h = Math.ceil((row + 1) * tileW) - Math.floor(row * tileW); ctx.fillRect(x, y, w, h); } } setTimeout(function() { ctx.draw(false, (function() { setTimeout(function() { uni.canvasToTempFilePath({ canvasId: options.canvasId, fileType: options.fileType, width: options.size, height: options.size, destWidth: options.size, destHeight: options.size, success: function(res) { let resData; // 将统一为base64格式 let tempFilePath = res.tempFilePath; // H5为base64，其他为相对路径 // #ifdef H5 resData = tempFilePath; options.success && options.success(resData); reslove(resData); // #endif // #ifdef APP-PLUS const path = plus.io.convertLocalFileSystemURL(tempFilePath) // 绝对路径 let fileReader = new plus.io.FileReader(); fileReader.readAsDataURL(path); fileReader.onloadend = res => { resData = res.target.result; options.success && options.success(resData); reslove(resData); }; // #endif // #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO uni.getFileSystemManager().readFile({ filePath: tempFilePath, encoding: 'base64', success: res => { resData = 'data:image/png;base64,' + res.data; options.success && options.success(resData); reslove(resData); } }) // #endif // #ifndef H5 || APP-PLUS || MP-WEIXIN || MP-QQ || MP-TOUTIAO if (plus) { const path = plus.io.convertLocalFileSystemURL(tempFilePath) // 绝对路径 let fileReader = new plus.io.FileReader(); fileReader.readAsDataURL(path); fileReader.onloadend = res => { resData = res.target.result; options.success && options.success(resData); reslove(resData); }; } else { uni.request({ url: tempFilePath, method: 'GET', responseType: 'arraybuffer', success: res => { resData = `data:image/png;base64,${uni.arrayBufferToBase64(res.data)}`; // 把arraybuffer转成base64 options.success && options.success(resData); reslove(resData); } }) } // #endif }, fail: function(error) { options.fail && options.fail(error); reject(error); }, complete: function(res) { options.complete && options.complete(res); } }, options.componentInstance); }, options.text.length + 100); })()); }, 150); } createCanvas(); }); } } })() export default uQRCode
（支付宝小程序会有些些问题）
补充： base64格式要加上data:image/jpeg;base64,前缀
imgUrl = `data:image/jpeg;base64,${base64}`
