1.First follow the dependency vue
npm install --save qrcode
2. Introduce on the page you need to use
import QRCode from 'qrcode';
3. Use
const codeDetail = (item) => {
//This is the data to be generated, mine is a string of numbers ().then((img) => {
(img);
//This img is the image path, and it can be displayed by assigning it to the img tag. });
};
1. Create a new js folder and put the following code in it. I put the code at the end. The js file name is
2. References on the page used
import UQrocode from "../../pages/";
3. You need to have a canvas before use
<canvas canvas- style="width: 30px; height: 30px"></canvas>
4. Use
({
//canvasId should be the same as the id of the canvas above. canvasId:'qrcode',
componentInstance:this,
text:'What you want to generate',
size:30//size, margin:0
})
},
Code
The following is the js code
//
//---------------------------------------------------------------------
// github /Sansnn/uQRCode
//---------------------------------------------------------------------
let uQRCode = {};
(function() {
//---------------------------------------------------------------------
// QRCode for JavaScript
//
// Copyright (c) 2009 Kazuhiko Arase
//
// URL: /
//
// Licensed under the MIT license:
// /licenses/
//
// The word "QR Code" is registered trademark of
// DENSO WAVE INCORPORATED
// /qrcode/
//
//---------------------------------------------------------------------
//---------------------------------------------------------------------
// QR8bitByte
//---------------------------------------------------------------------
function QR8bitByte(data) {
= QRMode.MODE_8BIT_BYTE;
= data;
}
= {
getLength: function(buffer) {
return ;
},
write: function(buffer) {
for (var i = 0; i < ; i++) {
// not JIS ...
((i), 8);
}
}
};
//---------------------------------------------------------------------
// QRCode
//---------------------------------------------------------------------
function QRCode(typeNumber, errorCorrectLevel) {
= typeNumber;
= errorCorrectLevel;
= null;
= 0;
= null;
= new Array();
}
= {
addData: function(data) {
var newData = new QR8bitByte(data);
(newData);
= null;
},
isDark: function(row, col) {
if (row < 0 || <= row || col < 0 || <= col) {
throw new Error(row + "," + col);
}
return [row][col];
},
getModuleCount: function() {
return ;
},
make: function() {
// Calculate automatically typeNumber if provided is < 1
if ( < 1) {
var typeNumber = 1;
for (typeNumber = 1; typeNumber < 40; typeNumber++) {
var rsBlocks = (typeNumber, );
var buffer = new QRBitBuffer();
var totalDataCount = 0;
for (var i = 0; i < ; i++) {
totalDataCount += rsBlocks[i].dataCount;
}
for (var i = 0; i < ; i++) {
var data = [i];
(, 4);
((), (, typeNumber));
(buffer);
}
if (() <= totalDataCount * 8)
break;
}
= typeNumber;
}
(false, ());
},
makeImpl: function(test, maskPattern) {
= * 4 + 17;
= new Array();
for (var row = 0; row < ; row++) {
[row] = new Array();
for (var col = 0; col < ; col++) {
[row][col] = null; //(col + row) % 3;
}
}
(0, 0);
( - 7, 0);
(0, - 7);
();
();
(test, maskPattern);
if ( >= 7) {
(test);
}
if ( == null) {
= (, , );
}
(, maskPattern);
},
setupPositionProbePattern: function(row, col) {
for (var r = -1; r <= 7; r++) {
if (row + r <= -1 || <= row + r) continue;
for (var c = -1; c <= 7; c++) {
if (col + c <= -1 || <= 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)) {
[row + r][col + c] = true;
} else {
[row + r][col + c] = false;
}
}
}
},
getBestMaskPattern: function() {
var minLostPoint = 0;
var pattern = 0;
for (var i = 0; i < 8; i++) {
(true, i);
var lostPoint = (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;
();
for (var row = 0; row < ; row++) {
var y = row * cs;
for (var col = 0; col < [row].length; col++) {
var x = col * cs;
var dark = [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 < - 8; r++) {
if ([r][6] != null) {
continue;
}
[r][6] = (r % 2 == 0);
}
for (var c = 8; c < - 8; c++) {
if ([6][c] != null) {
continue;
}
[6][c] = (c % 2 == 0);
}
},
setupPositionAdjustPattern: function() {
var pos = ();
for (var i = 0; i < ; i++) {
for (var j = 0; j < ; j++) {
var row = pos[i];
var col = pos[j];
if ([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)) {
[row + r][col + c] = true;
} else {
[row + r][col + c] = false;
}
}
}
}
}
},
setupTypeNumber: function(test) {
var bits = ();
for (var i = 0; i < 18; i++) {
var mod = (!test && ((bits >> i) & 1) == 1);
[(i / 3)][i % 3 + - 8 - 3] = mod;
}
for (var i = 0; i < 18; i++) {
var mod = (!test && ((bits >> i) & 1) == 1);
[i % 3 + - 8 - 3][(i / 3)] = mod;
}
},
setupTypeInfo: function(test, maskPattern) {
var data = ( << 3) | maskPattern;
var bits = (data);
// vertical
for (var i = 0; i < 15; i++) {
var mod = (!test && ((bits >> i) & 1) == 1);
if (i < 6) {
[i][8] = mod;
} else if (i < 8) {
[i + 1][8] = mod;
} else {
[ - 15 + i][8] = mod;
}
}
// horizontal
for (var i = 0; i < 15; i++) {
var mod = (!test && ((bits >> i) & 1) == 1);
if (i < 8) {
[8][ - i - 1] = mod;
} else if (i < 9) {
[8][15 - i - 1 + 1] = mod;
} else {
[8][15 - i - 1] = mod;
}
}
// fixed module
[ - 8][8] = (!test);
},
mapData: function(data, maskPattern) {
var inc = -1;
var row = - 1;
var bitIndex = 7;
var byteIndex = 0;
for (var col = - 1; col > 0; col -= 2) {
if (col == 6) col--;
while (true) {
for (var c = 0; c < 2; c++) {
if ([row][col - c] == null) {
var dark = false;
if (byteIndex < ) {
dark = (((data[byteIndex] >>> bitIndex) & 1) == 1);
}
var mask = (maskPattern, row, col - c);
if (mask) {
dark = !dark;
}
[row][col - c] = dark;
bitIndex--;
if (bitIndex == -1) {
byteIndex++;
bitIndex = 7;
}
}
}
row += inc;
if (row < 0 || <= row) {
row -= inc;
inc = -inc;
break;
}
}
}
}
};
QRCode.PAD0 = 0xEC;
QRCode.PAD1 = 0x11;
= function(typeNumber, errorCorrectLevel, dataList) {
var rsBlocks = (typeNumber, errorCorrectLevel);
var buffer = new QRBitBuffer();
for (var i = 0; i < ; i++) {
var data = dataList[i];
(, 4);
((), (, typeNumber));
(buffer);
}
// calc num max data.
var totalDataCount = 0;
for (var i = 0; i < ; i++) {
totalDataCount += rsBlocks[i].dataCount;
}
if (() > totalDataCount * 8) {
throw new Error("code length overflow. (" +
() +
">" +
totalDataCount * 8 +
")");
}
// end code
if (() + 4 <= totalDataCount * 8) {
(0, 4);
}
// padding
while (() % 8 != 0) {
(false);
}
// padding
while (true) {
if (() >= totalDataCount * 8) {
break;
}
(QRCode.PAD0, 8);
if (() >= totalDataCount * 8) {
break;
}
(QRCode.PAD1, 8);
}
return (buffer, rsBlocks);
}
= function(buffer, rsBlocks) {
var offset = 0;
var maxDcCount = 0;
var maxEcCount = 0;
var dcdata = new Array();
var ecdata = new Array();
for (var r = 0; r < ; r++) {
var dcCount = rsBlocks[r].dataCount;
var ecCount = rsBlocks[r].totalCount - dcCount;
maxDcCount = (maxDcCount, dcCount);
maxEcCount = (maxEcCount, ecCount);
dcdata[r] = new Array(dcCount);
for (var i = 0; i < dcdata[r].length; i++) {
dcdata[r][i] = 0xff & [i + offset];
}
offset += dcCount;
var rsPoly = (ecCount);
var rawPoly = new QRPolynomial(dcdata[r], () - 1);
var modPoly = (rsPoly);
ecdata[r] = new Array(() - 1);
for (var i = 0; i < ecdata[r].length; i++) {
var modIndex = i + () - ecdata[r].length;
ecdata[r][i] = (modIndex >= 0) ? (modIndex) : 0;
}
}
var totalCodeCount = 0;
for (var i = 0; i < ; 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 < ; r++) {
if (i < dcdata[r].length) {
data[index++] = dcdata[r][i];
}
}
}
for (var i = 0; i < maxEcCount; i++) {
for (var r = 0; r < ; 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 ((d) - (QRUtil.G15) >= 0) {
d ^= (QRUtil.G15 << ((d) - (QRUtil.G15)));
}
return ((data << 10) | d) ^ QRUtil.G15_MASK;
},
getBCHTypeNumber: function(data) {
var d = data << 12;
while ((d) - (QRUtil.G18) >= 0) {
d ^= (QRUtil.G18 << ((d) - (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 ((i / 2) + (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 = (new QRPolynomial([1, (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 = ();
var lostPoint = 0;
// LEVEL1
for (var row = 0; row < moduleCount; row++) {
for (var col = 0; col < moduleCount; col++) {
var sameCount = 0;
var dark = (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 == (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 ((row, col)) count++;
if ((row + 1, col)) count++;
if ((row, col + 1)) count++;
if ((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 ((row, col) &&
!(row, col + 1) &&
(row, col + 2) &&
(row, col + 3) &&
(row, col + 4) &&
!(row, col + 5) &&
(row, col + 6)) {
lostPoint += 40;
}
}
}
for (var col = 0; col < moduleCount; col++) {
for (var row = 0; row < moduleCount - 6; row++) {
if ((row, col) &&
!(row + 1, col) &&
(row + 2, col) &&
(row + 3, col) &&
(row + 4, col) &&
!(row + 5, col) &&
(row + 6, col)) {
lostPoint += 40;
}
}
}
// LEVEL4
var darkCount = 0;
for (var col = 0; col < moduleCount; col++) {
for (var row = 0; row < moduleCount; row++) {
if ((row, col)) {
darkCount++;
}
}
}
var ratio = (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 ( == undefined) {
throw new Error( + "/" + shift);
}
var offset = 0;
while (offset < && num[offset] == 0) {
offset++;
}
= new Array( - offset + shift);
for (var i = 0; i < - offset; i++) {
[i] = num[i + offset];
}
}
= {
get: function(index) {
return [index];
},
getLength: function() {
return ;
},
multiply: function(e) {
var num = new Array(() + () - 1);
for (var i = 0; i < (); i++) {
for (var j = 0; j < (); j++) {
num[i + j] ^= (((i)) + ((j)));
}
}
return new QRPolynomial(num, 0);
},
mod: function(e) {
if (() - () < 0) {
return this;
}
var ratio = ((0)) - ((0));
var num = new Array(());
for (var i = 0; i < (); i++) {
num[i] = (i);
}
for (var i = 0; i < (); i++) {
num[i] ^= (((i)) + ratio);
}
// recursive call
return new QRPolynomial(num, 0).mod(e);
}
};
//---------------------------------------------------------------------
// QRRSBlock
//---------------------------------------------------------------------
function QRRSBlock(totalCount, dataCount) {
= totalCount;
= 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]
];
= function(typeNumber, errorCorrectLevel) {
var rsBlock = (typeNumber, errorCorrectLevel);
if (rsBlock == undefined) {
throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);
}
var 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++) {
(new QRRSBlock(totalCount, dataCount));
}
}
return list;
}
= function(typeNumber, errorCorrectLevel) {
switch (errorCorrectLevel) {
case :
return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
case :
return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
case :
return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
case :
return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
default:
return undefined;
}
}
//---------------------------------------------------------------------
// QRBitBuffer
//---------------------------------------------------------------------
function QRBitBuffer() {
= new Array();
= 0;
}
= {
get: function(index) {
var bufIndex = (index / 8);
return (([bufIndex] >>> (7 - index % 8)) & 1) == 1;
},
put: function(num, length) {
for (var i = 0; i < length; i++) {
(((num >>> (length - i - 1)) & 1) == 1);
}
},
getLengthInBits: function() {
return ;
},
putBit: function(bit) {
var bufIndex = ( / 8);
if ( <= bufIndex) {
(0);
}
if (bit) {
[bufIndex] |= (0x80 >>> ( % 8));
}
++;
}
};
//---------------------------------------------------------------------
// Support Chinese
//---------------------------------------------------------------------
function utf16To8(text) {
var result = '';
var c;
for (var i = 0; i < ; i++) {
c = (i);
if (c >= 0x0001 && c <= 0x007F) {
result += (i);
} else if (c > 0x07FF) {
result += (0xE0 | c >> 12 & 0x0F);
result += (0x80 | c >> 6 & 0x3F);
result += (0x80 | c >> 0 & 0x3F);
} else {
result += (0xC0 | c >> 6 & 0x1F);
result += (0x80 | c >> 0 & 0x3F);
}
}
return result;
}
uQRCode = {
errorCorrectLevel: QRErrorCorrectLevel,
defaults: {
size: 354,
margin: 0,
backgroundColor: '#ffffff',
foregroundColor: '#000000',
fileType: 'png', // 'jpg', 'png'
errorCorrectLevel: ,
typeNumber: -1
},
make: function(options) {
return new Promise((reslove, reject) => {
var defaultOptions = {
canvasId: ,
componentInstance: ,
text: ,
size: ,
margin: ,
backgroundColor: ,
foregroundColor: ,
fileType: ,
errorCorrectLevel: ,
typeNumber:
};
if (options) {
for (var i in options) {
defaultOptions[i] = options[i];
}
}
options = defaultOptions;
if (!) {
('uQRCode: Please set canvasId!');
return;
}
function createCanvas() {
var qrcode = new QRCode(, );
(utf16To8());
();
var ctx = (, );
();
(0, 0, , );
var tileW = ( - * 2) / ();
var tileH = tileW;
for (var row = 0; row < (); row++) {
for (var col = 0; col < (); col++) {
var style = (row, col) ? : ;
(style);
var x = (col * tileW) + ;
var y = (row * tileH) + ;
var w = ((col + 1) * tileW) - (col * tileW);
var h = ((row + 1) * tileW) - (row * tileW);
(x, y, w, h);
}
}
setTimeout(function() {
(false, (function() {
setTimeout(function() {
({
canvasId: ,
fileType: ,
width: ,
height: ,
destWidth: ,
destHeight: ,
success: function(res) {
let resData; // Will be unified into base64 format let tempFilePath = ; // H5 is base64, others are relative paths // #ifdef H5
resData = tempFilePath;
&& (resData);
reslove(resData);
// #endif
// #ifdef APP-PLUS
const path = (tempFilePath) // Absolute path let fileReader = new ();
(path);
= res => {
resData = ;
&& (resData);
reslove(resData);
};
// #endif
// #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO
().readFile({
filePath: tempFilePath,
encoding: 'base64',
success: res => {
resData = 'data:image/png;base64,' + ;
&& (resData);
reslove(resData);
}
})
// #endif
// #ifndef H5 || APP-PLUS || MP-WEIXIN || MP-QQ || MP-TOUTIAO
if (plus) {
const path = (tempFilePath) // Absolute path let fileReader = new ();
(path);
= res => {
resData = ;
&& (resData);
reslove(resData);
};
} else {
({
url: tempFilePath,
method: 'GET',
responseType: 'arraybuffer',
success: res => {
resData = `data:image/png;base64,${uni.arrayBufferToBase64()}`; // Convert arraybuffer to base64 && (resData);
reslove(resData);
}
})
}
// #endif
},
fail: function(error) {
&& (error);
reject(error);
},
complete: function(res) {
&& (res);
}
}, );
}, + 100);
})());
}, 150);
}
createCanvas();
});
}
}
})()
export default uQRCodeThe above is the detailed content of vue+uniapp to generate QR codes. For more information about vue generating QR codes, please pay attention to my other related articles!