uni-app小程序生成二维码传参--慧智精品网

uni-app⼩程序⽣成⼆维码传参

<div>

// 显⽰⼆维码的容器

</div>

</template>

// 导⼊外部JS库

import QRCode from'./../Utils/weapp-qrcode.js'

我国四大古典名著

export default{

data(){

return{

src:""

}

onLoad(){

setTimeout(()=>{

},500)

methods:{

// ⼆维码⽣成⼯具

couponQrCode(){

new QRCode('myQrcode',{

text:"www.baidu",

width:100,

height:100,

colorDark:"#333333",

colorLight:"#FFFFFF",

correctLevel: QRCode.CorrectLevel.H

})

}

</script>

<style>

.canvas{

width: 200upx;height: 200upx;

}

</style>

weapp-qrcode.js 复制后可⽤

var QRCode;

(function(){

/**

* Get the type by string length

* @private

* @param {String} sText

* @param {Number} nCorrectLevel

* @return {Number} type

function_getTypeNumber(sText, nCorrectLevel){

var nType =1;

var length =_getUTF8Length(sText);

for(var i =0, len = QRCodeLimitLength.length; i <= len; i++){

var nLimit =0;

switch(nCorrectLevel){

case QRErrorCorrectLevel.L:

nLimit = QRCodeLimitLength[i][0];

break;

case QRErrorCorrectLevel.M:

nLimit = QRCodeLimitLength[i][1];

break;

case QRErrorCorrectLevel.Q:

nLimit = QRCodeLimitLength[i][2];

break;

case QRErrorCorrectLevel.H:tcpip协议详解

nLimit = QRCodeLimitLength[i][3];

break;

}

if(length <= nLimit){

break;

}else{

nType++;

}

if(nType > QRCodeLimitLength.length){

throw new Error("Too long data");

}

return nType;

}

function_getUTF8Length(sText){

var replacedText =encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g,'a');

return replacedText.length +(replacedText.length != sText ?3:0);

}有志者事竟成举三个例子

function QR8bitByte(data){

this.data = data;

this.parsedData =[];

// Added to support UTF-8 Characters

for(var i =0, l =this.data.length; i < l; i++){

var byteArray =[];

var code =this.data.charCodeAt(i);

if(code >0x10000){

byteArray[0]=0xF0|((code &0x1C0000)>>>18);

byteArray[1]=0x80|((code &0x3F000)>>>12);

byteArray[2]=0x80|((code &0xFC0)>>>6);

byteArray[3]=0x80|(code &0x3F);

}else if(code >0x800){

中国著名的桥byteArray[0]=0xE0|((code &0xF000)>>>12);

byteArray[1]=0x80|((code &0xFC0)>>>6);

byteArray[2]=0x80|(code &0x3F);

}else if(code >0x80){

byteArray[0]=0xC0|((code &0x7C0)>>>6);

byteArray[1]=0x80|(code &0x3F);

}else{

byteArray[0]= code;

}

this.parsedData.push(byteArray);

}

this.parsedData = at.apply([],this.parsedData);

if(this.parsedData.length !=this.data.length){

this.parsedData.unshift(191);

this.parsedData.unshift(187);

this.parsedData.unshift(239);

}

QR8bitByte.prototype ={

getLength:function(buffer){

return this.parsedData.length;

我做了一项小实验300字},

write:function(buffer){

for(var i =0, l =this.parsedData.length; i < l; i++){

buffer.put(this.parsedData[i],8);

}

};

// QRCodeModel

function QRCodeModel(typeNumber, errorCorrectLevel){

this.dataCache =null;

this.dataList =[];

}

QRCodeModel.prototype ={

addData:function(data){var newData =new QR8bitByte(data);this.dataList.push(newData);this.dataCache =null;}, isDark:function(row, col){ if(row <0||duleCount <= row || col <0||duleCount <= col){throw new Error(row +","+ col);}

dules[row][col];

}, getModuleCount:function(){duleCount;}, make:function(){this.makeImpl(BestMaskPattern());}, makeImpl:function( test, maskPattern){

if(this.dataCache ==null){this.dataCache = CorrectLevel,this.dataList);}

this.mapData(this.dataCache, maskPattern);

}, setupPositionProbePattern:function(row, col){for(var r =-1; r <=7; r++){if(row + r <=-1||duleCount <= row + r)continue;for(var c =-1;

c <=7; c++){if(col + c <=-1||duleCount <= 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)){dules[row + r][col + c]=true;}dules[row + r][col + c]=false;}}}}, getBestMaskPattern:funct ion(){

var minLostPoint =0;var pattern =0;for(var i =0; i <8; i++){this.makeImpl(true, i);var lostPoint = LostPoint(this);if(i ==0|| minLostPo int > lostPoint){ minLostPoint = lostPoint; pattern = i;}}

return pattern;

}, createMovieClip:function(target_mc, instance_name, depth){

return qr_mc;

}, setupTimingPattern:function(){

for(var r =8; r &duleCount -8; r++){

dules[r][6]!=null){continue;}

}

for(var c =8; c &duleCount -8; c++){

dules[6][c]!=null){continue;}

}

}, setupPositionAdjustPattern:function(){

var pos = peNumber);for(var i =0; i < pos.length; i++){

for(var j =0; j < pos.length; j++){

var row = pos[i];var col = pos[j];dules[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)){dules[row + r][col + c]=true;}dules[row + r][col + c]=false;}}}

}

}, setupTypeNumber:function(test){

var bits = peNumber);for(var i =0; i <18; i++){var mod =(!test &&((bits >> i)&1)==1);dules[Math.flo or(i /3)][i %duleCount -8-3]= mod;}

for(var i =0; i <18; i++){var mod =(!test &&((bits >> i)&1)==1);dules[i %duleCount -8-3][Math.floor(i /3)]= mod;} }, setupTypeInfo:function(test, maskPattern){

var data =(CorrectLevel <<3)| maskPattern;var bits = BCHTypeInfo(data);for(var i

=0; i <15; i++){var mod =(!test &&((bits >> i)&1)==1);if(i <6){dules[i][8]= mod;}else if(i <8){dules[i +1][8]= mod;}duleCount -15+ i][8]= mod;} }

for(var i =0; i <15; i++){var mod =(!test &&((bits >> i)&1)==1);if(i <8){dules[8][duleCount - i -1]= mod;}else if(i <9){this. modules[8][15- i -1+1]= mod;}dules[8][15- i -1]= mod;}}

}, mapData:function(data, maskPattern){

var inc =-1;var row =duleCount -1;var bitIndex =7;var byteIndex =0;for(var col =duleCount -1; col >0; col -=2){

if(col ==6) col--;while(true){

for(var c =0; c <2; c++){

dules[row][col - c]==null){

var dark =false;if(byteIndex < data.length){ dark =(((data[byteIndex]>>> bitIndex)&1)==1);}

var mask = Mask(maskPattern, row, col - c);if(mask){ dark =!dark;}

}

row += inc;if(row <0||duleCount <= row){ row -= inc; inc =-inc;break;}

}

};

QRCodeModel.PAD0=0xEC;

QRCodeModel.PAD1=0x11;

var rsBlocks = RSBlocks(typeNumber, errorCorrectLevel);var buffer =new QRBitBuffer();for(var i =0; i < dataList.length; i++){var d ata = dataList[i]; buffer.de,4); buffer.Length(), de, typeNumber)); data.write(buffer);} var totalDataCount =0;for(var i =0; i < rsBlocks.length; i++){ totalDataCount += rsBlocks[i].dataCount;}

LengthInBits()> totalDataCount *8){

throw new Error("code length overflow. ("

+ LengthInBits()

+">"

+ totalDataCount *8

+")");

}

LengthInBits()+4<= totalDataCount *8){ buffer.put(0,4);}

LengthInBits()%8!=0){ buffer.putBit(false);}

while(true){

LengthInBits()>= totalDataCount *8){break;}

buffer.put(QRCodeModel.PAD0,8);LengthInBits()>= totalDataCount *8){break;}

buffer.put(QRCodeModel.PAD1,8);

}

ateBytes(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); maxEcCou nt = 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 = ErrorCorrectPolynomial(ecCount);var rawPoly =new QRPolynomial(dcdata[r], Length()-1);va r modPoly = d(rsPoly); ecdata[r]=new Length()-1);for(var i =0; i < ecdata[r].length; i++){var modIndex = i + Le ngth()- ecdata[r].length; ecdata[r][i]=(modIndex >=0)? (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].lengt h){ 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;

};

var QRMode ={MODE_NUMBER:1<<0,MODE_ALPHA_NUM:1<<1,MODE_8BIT_BYTE:1<<2,MODE_KANJI:1<<3};

var QRErrorCorrectLevel ={L:1,M:0,Q:3,H:2};

var QRMaskPattern ={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PA TTERN111:7};

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],[6,34,6 2],[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],[6,24,5 0,76,102,128,154],[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),G1 5_MASK:(1<<14)|(1<<12)|(1<<10)|(1<<4)|(1<<1), getBCHTypeInfo:function(data){

var d = data <<10;BCHDigit(d)- BCHDigit(QRUtil.G15)>=0){ d ^=(QRUtil.G15<<(BCHDigit(d)- BCHDigit(QRUtil.G15)));}

return((data <<10)| d)^ QRUtil.G15_MASK;

}, getBCHTypeNumber:function(data){

var d = data <<12;BCHDigit(d)- BCHDigit(QRUtil.G18)>=0){ d ^=(QRUtil.G18<<(BCHDigit(d)- BCHDigit(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){s witch(maskPattern){case QRMaskPattern.PATTERN000:return(i + j)%2==0;case QRMaskPattern.PATTERN001:return i %2==0;case QRMaskPatt ern.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:"+ mask Pattern);}}, getErrorCorrectPolynomial:function(errorCorrectLength){

var a =new QRPolynomial([1],0);for(var i =0; i < errorCorrectLength; i++){ a = a.multiply(new QRPolynomial([1, p(i)],0));}

高云翔案件return a;

}, getLengthInBits:function(mode, type){if(1<= type && type <10){switch(mode){case QRMode.MODE_NUMBER:return10;case QRMode.MO DE_ALPHA_NUM:return9;case QRMode.MODE_8BIT_BYTE:return8;case QRMode.MODE_KANJI:return8;default:throw new Error("mode:"+ mode) ;}}else if(type <27){switch(mode){case QRMode.MODE_NUMBER:return12;case QRMode.MODE_ALPHA_NUM:return11;case QRMode.MODE_ 8BIT_BYTE:return16;case QRMode.MODE_KANJI:return10;default:throw new Error("mode:"+ mode);}}else if(type <41){switch(mode){case QR Mode.MODE_NUMBER:return14;case QRMode.MODE_ALPHA_NUM:return13;case QRMode.MODE_8BIT_BYTE:return16;case QRMode.MODE_K ANJI:return12;default:throw new Error("mode:"+ mode);}}else{throw new Error("type:"+ type);}}, getLostPoint:function(qrCode){ var moduleCount = ModuleCount();var lostPoint =0;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);}

}

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;}}}

for(var row =0; row < moduleCount; row++){for(var col =0; col < moduleCount -6; col++){if(qrCode.isDark(row, col)&&!qrCode.isDark(row, co l +1)&& qrCode.isDark(row, col +2)&& qrCode.isDark(row, col +3)&& qrCode.isDark(row, col +4)&&!qrCode.isDark(row, col +5)&& qrCode.isDark(ro w, 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(ro w +6, col)){ lostPoint +=40;}}}

var darkCount =0;for(var col =0; col < moduleCount; col++){for(var row =0; row < moduleCount; row++){if(qrCode.isDark(row, col)){ darkCo unt++;}}}

var ratio = Math.abs(100* darkCount / moduleCount / moduleCount -50)/5; lostPoint += ratio *10;return lostPoint;

}

};

var QRMath ={

glog:function(n){

if(n <1){throw new Error("glog("+ n +")");}

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