uniapp使用tki-qrcode生成二维码
uniapp使用tki-qrcode生成二维码
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- 导入插件方式一：
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导入插件方式一：
1、使用npm下载： 详细属性.方法.事件说明请参照npmjs社区
npm i tki-qrcode
2、页面使用并引入挂载插件：
import tkiQrcode from "tki-qrcode"
export default {
components: {
tkiQrcode
},
data() {
return {
qrcode: 'https://blog.csdn.net/2201_75870706?type=blog', //二维码的内容链接
size: 260, //二维码的大小
unit: 'upx', //大小单位 !!! rpx单位有误
load_make: true, //组件加载完成后自动生成二维码
show_loading: false, //是否添加loading
onval: true, //val值变化时自动重新生成二维码
background: '#ffffff', //背景色
foreground: '#000',//点色
pdground: '#000', //角标色
icon: 'https://gtms03.alicdn.com/tps/i3/TB1yeWeIFXXXXX5XFXXuAZJYXXX-210-210.png_80x80.jpg', //二维码图标
iconsize: 30, //二维码图标大小
lv: 3, //二维码容错级别
loadingText: '加载中', //loading内容
}
},
methods:{
qrR(e){
console.log("生成的图片base64或图片临时地址",e)
}
}
}
导入插件方式二：
1、在common文件夹或者components文件夹下新建tki-qrcode文件夹：
2、在tki-qrcode文件夹下新建qrcode.js文件：
let QRCode = {};
(function () {
/**
* 获取单个字符的utf8编码
* unicode BMP平面约65535个字符
* @param {num} code
* return {array}
*/
function unicodeFormat8(code) {
// 1 byte
var c0, c1, c2;
if (code < 128) {
return [code];
// 2 bytes
} else if (code < 2048) {
c0 = 192 + (code >> 6);
c1 = 128 + (code & 63);
return [c0, c1];
// 3 bytes
} else {
c0 = 224 + (code >> 12);
c1 = 128 + (code >> 6 & 63);
c2 = 128 + (code & 63);
return [c0, c1, c2];
}
}
/**
* 获取字符串的utf8编码字节串
* @param {string} string
* @return {array}
*/
function getUTF8Bytes(string) {
var utf8codes = [];
for (var i = 0; i < string.length; i++) {
var code = string.charCodeAt(i);
var utf8 = unicodeFormat8(code);
for (var j = 0; j < utf8.length; j++) {
utf8codes.push(utf8[j]);
}
}
return utf8codes;
}
/**
* 二维码算法实现
* @param {string} data 要编码的信息字符串
* @param {num} errorCorrectLevel 纠错等级
*/
function QRCodeAlg(data, errorCorrectLevel) {
this.typeNumber = -1; //版本
this.errorCorrectLevel = errorCorrectLevel;
this.modules = null; //二维矩阵，存放最终结果
this.moduleCount = 0; //矩阵大小
this.dataCache = null; //数据缓存
this.rsBlocks = null; //版本数据信息
this.totalDataCount = -1; //可使用的数据量
this.data = data;
this.utf8bytes = getUTF8Bytes(data);
this.make();
}
QRCodeAlg.prototype = {
constructor: QRCodeAlg,
/**
* 获取二维码矩阵大小
* @return {num} 矩阵大小
*/
getModuleCount: function () {
return this.moduleCount;
},
/**
* 编码
*/
make: function () {
this.getRightType();
this.dataCache = this.createData();
this.createQrcode();
},
/**
* 设置二位矩阵功能图形
* @param {bool} test 表示是否在寻找最好掩膜阶段
* @param {num} maskPattern 掩膜的版本
*/
makeImpl: function (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);
}
this.setupPositionProbePattern(0, 0);
this.setupPositionProbePattern(this.moduleCount - 7, 0);
this.setupPositionProbePattern(0, this.moduleCount - 7);
this.setupPositionAdjustPattern();
this.setupTimingPattern();
this.setupTypeInfo(true, maskPattern);
if (this.typeNumber >= 7) {
this.setupTypeNumber(true);
}
this.mapData(this.dataCache, maskPattern);
},
/**
* 设置二维码的位置探测图形
* @param {num} row 探测图形的中心横坐标
* @param {num} col 探测图形的中心纵坐标
*/
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;
}
}
}
},
/**
* 创建二维码
* @return {[type]} [description]
*/
createQrcode: function () {
var minLostPoint = 0;
var pattern = 0;
var bestModules = null;
for (var i = 0; i < 8; i++) {
this.makeImpl(i);
var lostPoint = QRUtil.getLostPoint(this);
if (i == 0 || minLostPoint > lostPoint) {
minLostPoint = lostPoint;
pattern = i;
bestModules = this.modules;
}
}
this.modules = bestModules;
this.setupTypeInfo(false, pattern);
if (this.typeNumber >= 7) {
this.setupTypeNumber(false);
}
},
/**
* 设置定位图形
* @return {[type]} [description]
*/
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);
if (this.modules[6][r] != null) {
continue;
}
this.modules[6][r] = (r % 2 == 0);
}
},
/**
* 设置矫正图形
* @return {[type]} [description]
*/
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;
}
}
}
}
}
},
/**
* 设置版本信息（7以上版本才有）
* @param {bool} test 是否处于判断最佳掩膜阶段
* @return {[type]} [description]
*/
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;
this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
}
},
/**
* 设置格式信息（纠错等级和掩膜版本）
* @param {bool} test
* @param {num} maskPattern 掩膜版本
* @return {}
*/
setupTypeInfo: function (test, maskPattern) {
var data = (QRErrorCorrectLevel[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
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);
},
/**
* 数据编码
* @return {[type]} [description]
*/
createData: function () {
var buffer = new QRBitBuffer();
var lengthBits = this.typeNumber > 9 ? 16 : 8;
buffer.put(4, 4); //添加模式
buffer.put(this.utf8bytes.length, lengthBits);
for (var i = 0, l = this.utf8bytes.length; i < l; i++) {
buffer.put(this.utf8bytes[i], 8);
}
if (buffer.length + 4 <= this.totalDataCount * 8) {
buffer.put(0, 4);
}
// padding
while (buffer.length % 8 != 0) {
buffer.putBit(false);
}
// padding
while (true) {
if (buffer.length >= this.totalDataCount * 8) {
break;
}
buffer.put(QRCodeAlg.PAD0, 8);
if (buffer.length >= this.totalDataCount * 8) {
break;
}
buffer.put(QRCodeAlg.PAD1, 8);
}
return this.createBytes(buffer);
},
/**
* 纠错码编码
* @param {buffer} buffer 数据编码
* @return {[type]}
*/
createBytes: function (buffer) {
var offset = 0;
var maxDcCount = 0;
var maxEcCount = 0;
var length = this.rsBlock.length / 3;
var rsBlocks = new Array();
for (var i = 0; i < length; i++) {
var count = this.rsBlock[i * 3 + 0];
var totalCount = this.rsBlock[i * 3 + 1];
var dataCount = this.rsBlock[i * 3 + 2];
for (var j = 0; j < count; j++) {
rsBlocks.push([dataCount, totalCount]);
}
}
var dcdata = new Array(rsBlocks.length);
var ecdata = new Array(rsBlocks.length);
for (var r = 0; r < rsBlocks.length; r++) {
var dcCount = rsBlocks[r][0];
var ecCount = rsBlocks[r][1] - 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 data = new Array(this.totalDataCount);
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;
},
/**
* 布置模块，构建最终信息
* @param {} data
* @param {} maskPattern
* @return {}
*/
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;
}
}
}
}
};
/**
* 填充字段
*/
QRCodeAlg.PAD0 = 0xEC;
QRCodeAlg.PAD1 = 0x11;
//---------------------------------------------------------------------
// 纠错等级对应的编码
//---------------------------------------------------------------------
var QRErrorCorrectLevel = [1, 0, 3, 2];
//---------------------------------------------------------------------
// 掩膜版本
//---------------------------------------------------------------------
var QRMaskPattern = {
PATTERN000: 0,
PATTERN001: 1,
PATTERN010: 2,
PATTERN011: 3,
PATTERN100: 4,
PATTERN101: 5,
PATTERN110: 6,
PATTERN111: 7
};
//---------------------------------------------------------------------
// 工具类
//---------------------------------------------------------------------
var QRUtil = {
/*
每个版本矫正图形的位置
*/
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),
/*
BCH编码格式信息
*/
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;
},
/*
BCH编码版本信息
*/
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;
},
/*
获取BCH位信息
*/
getBCHDigit: function (data) {
var digit = 0;
while (data != 0) {
digit++;
data >>>= 1;
}
return digit;
},
/*
获取版本对应的矫正图形位置
*/
getPatternPosition: function (typeNumber) {
return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
},
/*
掩膜算法
*/
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);
}
},
/*
获取RS的纠错多项式
*/
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;
},
/*
获取评价
*/
getLostPoint: function (qrCode) {
var moduleCount = qrCode.getModuleCount(),
lostPoint = 0,
darkCount = 0;
for (var row = 0; row < moduleCount; row++) {
var sameCount = 0;
var head = qrCode.modules[row][0];
for (var col = 0; col < moduleCount; col++) {
var current = qrCode.modules[row][col];
//level 3 评价
if (col < moduleCount - 6) {
if (current && !qrCode.modules[row][col + 1] && qrCode.modules[row][col + 2] && qrCode.modules[row][col + 3] && qrCode.modules[row][col + 4] && !qrCode.modules[row][col + 5] && qrCode.modules[row][col + 6]) {
if (col < moduleCount - 10) {
if (qrCode.modules[row][col + 7] && qrCode.modules[row][col + 8] && qrCode.modules[row][col + 9] && qrCode.modules[row][col + 10]) {
lostPoint += 40;
}
} else if (col > 3) {
if (qrCode.modules[row][col - 1] && qrCode.modules[row][col - 2] && qrCode.modules[row][col - 3] && qrCode.modules[row][col - 4]) {
lostPoint += 40;
}
}
}
}
//level 2 评价
if ((row < moduleCount - 1) && (col < moduleCount - 1)) {
var count = 0;
if (current) count++;
if (qrCode.modules[row + 1][col]) count++;
if (qrCode.modules[row][col + 1]) count++;
if (qrCode.modules[row + 1][col + 1]) count++;
if (count == 0 || count == 4) {
lostPoint += 3;
}
}
//level 1 评价
if (head ^ current) {
sameCount++;
} else {
head = current;
if (sameCount >= 5) {
lostPoint += (3 + sameCount - 5);
}
sameCount = 1;
}
//level 4 评价
if (current) {
darkCount++;
}
}
}
for (var col = 0; col < moduleCount; col++) {
var sameCount = 0;
var head = qrCode.modules[0][col];
for (var row = 0; row < moduleCount; row++) {
var current = qrCode.modules[row][col];
//level 3 评价
if (row < moduleCount - 6) {
if (current && !qrCode.modules[row + 1][col] && qrCode.modules[row + 2][col] && qrCode.modules[row + 3][col] && qrCode.modules[row + 4][col] && !qrCode.modules[row + 5][col] && qrCode.modules[row + 6][col]) {
if (row < moduleCount - 10) {
if (qrCode.modules[row + 7][col] && qrCode.modules[row + 8][col] && qrCode.modules[row + 9][col] && qrCode.modules[row + 10][col]) {
lostPoint += 40;
}
} else if (row > 3) {
if (qrCode.modules[row - 1][col] && qrCode.modules[row - 2][col] && qrCode.modules[row - 3][col] && qrCode.modules[row - 4][col]) {
lostPoint += 40;
}
}
}
}
//level 1 评价
if (head ^ current) {
sameCount++;
} else {
head = current;
if (sameCount >= 5) {
lostPoint += (3 + sameCount - 5);
}
sameCount = 1;
}
}
}
// LEVEL4
var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
lostPoint += ratio * 10;
return lostPoint;
}
};
//---------------------------------------------------------------------
// QRMath使用的数学工具
//---------------------------------------------------------------------
var QRMath = {
/*
将n转化为a^m
*/
glog: function (n) {
if (n < 1) {
throw new Error("glog(" + n + ")");
}
return QRMath.LOG_TABLE[n];
},
/*
将a^m转化为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 多项式
//---------------------------------------------------------------------
/**
* 多项式类
* @param {Array} num 系数
* @param {num} shift a^shift
*/
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;
},
/**
* 多项式乘法
* @param {QRPolynomial} e 被乘多项式
* @return {[type]} [description]
*/
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);
},
/**
* 多项式模运算
* @param {QRPolynomial} e 模多项式
* @return {}
*/
mod: function (e) {
var tl = this.getLength(),
el = e.getLength();
if (tl - el < 0) {
return this;
}
var num = new Array(tl);
for (var i = 0; i < tl; i++) {
num[i] = this.get(i);
}
while (num.length >= el) {
var ratio = QRMath.glog(num[0]) - QRMath.glog(e.get(0));
for (var i = 0; i < e.getLength(); i++) {
num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
}
while (num[0] == 0) {
num.shift();
}
}
return new QRPolynomial(num, 0);
}
};
//---------------------------------------------------------------------
// RS_BLOCK_TABLE
//---------------------------------------------------------------------
/*
二维码各个版本信息[块数, 每块中的数据块数, 每块中的信息块数]
*/
var 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]
];
/**
* 根据数据获取对应版本
* @return {[type]} [description]
*/
QRCodeAlg.prototype.getRightType = function () {
for (var typeNumber = 1; typeNumber < 41; typeNumber++) {
var rsBlock = RS_BLOCK_TABLE[(typeNumber - 1) * 4 + this.errorCorrectLevel];
if (rsBlock == undefined) {
throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + this.errorCorrectLevel);
}
var length = rsBlock.length / 3;
var totalDataCount = 0;
for (var i = 0; i < length; i++) {
var count = rsBlock[i * 3 + 0];
var dataCount = rsBlock[i * 3 + 2];
totalDataCount += dataCount * count;
}
var lengthBytes = typeNumber > 9 ? 2 : 1;
if (this.utf8bytes.length + lengthBytes < totalDataCount || typeNumber == 40) {
this.typeNumber = typeNumber;
this.rsBlock = rsBlock;
this.totalDataCount = totalDataCount;
break;
}
}
};
//---------------------------------------------------------------------
// 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);
},
put: function (num, length) {
for (var i = 0; i < length; i++) {
this.putBit(((num >>> (length - i - 1)) & 1));
}
},
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++;
}
};
// xzedit
let qrcodeAlgObjCache = [];
/**
* 二维码构造函数，主要用于绘制
* @param {参数列表} opt 传递参数
* @return {}
*/
QRCode = function (opt) {
//设置默认参数
this.options = {
text: '',
size: 256,
correctLevel: 3,
background: '#ffffff',
foreground: '#000000',
pdground: '#000000',
image: '',
imageSize: 30,
canvasId: opt.canvasId,
context: opt.context,
usingComponents: opt.usingComponents,
showLoading: opt.showLoading,
loadingText: opt.loadingText,
};
if (typeof opt === 'string') { // 只编码ASCII字符串
opt = {
text: opt
};
}
if (opt) {
for (var i in opt) {
this.options[i] = opt[i];
}
}
//使用QRCodeAlg创建二维码结构
var qrCodeAlg = null;
for (var i = 0, l = qrcodeAlgObjCache.length; i < l; i++) {
if (qrcodeAlgObjCache[i].text == this.options.text && qrcodeAlgObjCache[i].text.correctLevel == this.options.correctLevel) {
qrCodeAlg = qrcodeAlgObjCache[i].obj;
break;
}
}
if (i == l) {
qrCodeAlg = new QRCodeAlg(this.options.text, this.options.correctLevel);
qrcodeAlgObjCache.push({
text: this.options.text,
correctLevel: this.options.correctLevel,
obj: qrCodeAlg
});
}
/**
* 计算矩阵点的前景色
* @param {Obj} config
* @param {Number} config.row 点x坐标
* @param {Number} config.col 点y坐标
* @param {Number} config.count 矩阵大小
* @param {Number} config.options 组件的options
* @return {String}
*/
let getForeGround = function (config) {
var options = config.options;
if (options.pdground && (
(config.row > 1 && config.row < 5 && config.col > 1 && config.col < 5) ||
(config.row > (config.count - 6) && config.row < (config.count - 2) && config.col > 1 && config.col < 5) ||
(config.row > 1 && config.row < 5 && config.col > (config.count - 6) && config.col < (config.count - 2))
)) {
return options.pdground;
}
return options.foreground;
}
// 创建canvas
let createCanvas = function (options) {
if (options.showLoading) {
uni.showLoading({
title: options.loadingText,
mask: true
});
}
var ctx = uni.createCanvasContext(options.canvasId, options.context);
var count = qrCodeAlg.getModuleCount();
var ratioSize = options.size;
var ratioImgSize = options.imageSize;
//计算每个点的长宽
var tileW = (ratioSize / count).toPrecision(4);
var tileH = (ratioSize / count).toPrecision(4);
//绘制
for (var row = 0; row < count; row++) {
for (var col = 0; col < count; col++) {
var w = (Math.ceil((col + 1) * tileW) - Math.floor(col * tileW));
var h = (Math.ceil((row + 1) * tileW) - Math.floor(row * tileW));
var foreground = getForeGround({
row: row,
col: col,
count: count,
options: options
});
ctx.setFillStyle(qrCodeAlg.modules[row][col] ? foreground : options.background);
ctx.fillRect(Math.round(col * tileW), Math.round(row * tileH), w, h);
}
}
if (options.image) {
var x = Number(((ratioSize - ratioImgSize) / 2).toFixed(2));
var y = Number(((ratioSize - ratioImgSize) / 2).toFixed(2));
drawRoundedRect(ctx, x, y, ratioImgSize, ratioImgSize, 2, 6, true, true)
ctx.drawImage(options.image, x, y, ratioImgSize, ratioImgSize);
// 画圆角矩形
function drawRoundedRect(ctxi, x, y, width, height, r, lineWidth, fill, stroke) {
ctxi.setLineWidth(lineWidth);
ctxi.setFillStyle(options.background);
ctxi.setStrokeStyle(options.background);
ctxi.beginPath(); // draw top and top right corner
ctxi.moveTo(x + r, y);
ctxi.arcTo(x + width, y, x + width, y + r, r); // draw right side and bottom right corner
ctxi.arcTo(x + width, y + height, x + width - r, y + height, r); // draw bottom and bottom left corner
ctxi.arcTo(x, y + height, x, y + height - r, r); // draw left and top left corner
ctxi.arcTo(x, y, x + r, y, r);
ctxi.closePath();
if (fill) {
ctxi.fill();
}
if (stroke) {
ctxi.stroke();
}
}
}
setTimeout(() => {
ctx.draw(true, () => {
// 保存到临时区域
setTimeout(() => {
uni.canvasToTempFilePath({
width: options.width,
height: options.height,
destWidth: options.width,
destHeight: options.height,
canvasId: options.canvasId,
quality: Number(1),
success: function (res) {
if (options.cbResult) {
options.cbResult(res.tempFilePath)
}
},
fail: function (res) {
if (options.cbResult) {
options.cbResult(res)
}
},
complete: function () {
if (options.showLoading){
uni.hideLoading();
}
},
}, options.context);
}, options.text.length + 100);
});
}, options.usingComponents ? 0 : 150);
}
createCanvas(this.options);
// 空判定
let empty = function (v) {
let tp = typeof v,
rt = false;
if (tp == "number" && String(v) == "") {
rt = true
} else if (tp == "undefined") {
rt = true
} else if (tp == "object") {
if (JSON.stringify(v) == "{}" || JSON.stringify(v) == "[]" || v == null) rt = true
} else if (tp == "string") {
if (v == "" || v == "undefined" || v == "null" || v == "{}" || v == "[]") rt = true
} else if (tp == "function") {
rt = false
}
return rt
}
};
QRCode.prototype.clear = function (fn) {
var ctx = uni.createCanvasContext(this.options.canvasId, this.options.context)
ctx.clearRect(0, 0, this.options.size, this.options.size)
ctx.draw(false, () => {
if (fn) {
fn()
}
})
};
})()
export default QRCode
3、页面使用并引入挂载插件：