PC版网页转换手机端H5网页+二维码预览展示

效果图

中间的网站可随时替换（自己更换域名即可）

一、新建一个index.html，把以下代码复制进去
内容更换，找到

  <iframe src="https://lanrenn.cn/"></iframe>替换https://lanrenn.cn/这个链接即可。

二、在新建文件qrcode.js引入JS代码，路径static/js/qrcode.js

var QRCode;!function(){function t(t){this.mode=r.MODE_8BIT_BYTE,this.data=t,this.parsedData=[];for(var e=0,o=this.data.length;e<o;e++){var i=[],n=this.data.charCodeAt(e);n>65536?(i[0]=240|(1835008&n)>>>18,i[1]=128|(258048&n)>>>12,i[2]=128|(4032&n)>>>6,i[3]=128|63&n):n>2048?(i[0]=224|(61440&n)>>>12,i[1]=128|(4032&n)>>>6,i[2]=128|63&n):n>128?(i[0]=192|(1984&n)>>>6,i[1]=128|63&n):i[0]=n,this.parsedData.push(i)}this.parsedData=Array.prototype.concat.apply([],this.parsedData),this.parsedData.length!=this.data.length&&(this.parsedData.unshift(191),this.parsedData.unshift(187),this.parsedData.unshift(239))}function e(t,e){this.typeNumber=t,this.errorCorrectLevel=e,this.modules=null,this.moduleCount=0,this.dataCache=null,this.dataList=[]}t.prototype={getLength:function(t){return this.parsedData.length},write:function(t){for(var e=0,r=this.parsedData.length;e<r;e++)t.put(this.parsedData[e],8)}},e.prototype={addData:function(e){var r=new t(e);this.dataList.push(r),this.dataCache=null},isDark:function(t,e){if(t<0||this.moduleCount<=t||e<0||this.moduleCount<=e)throw new Error(t+","+e);return this.modules[t][e]},getModuleCount:function(){return this.moduleCount},make:function(){this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(t,r){this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount);for(var o=0;o<this.moduleCount;o++){this.modules[o]=new Array(this.moduleCount);for(var i=0;i<this.moduleCount;i++)this.modules[o][i]=null}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(t,r),this.typeNumber>=7&&this.setupTypeNumber(t),null==this.dataCache&&(this.dataCache=e.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,r)},setupPositionProbePattern:function(t,e){for(var r=-1;r<=7;r++)if(!(t+r<=-1||this.moduleCount<=t+r))for(var o=-1;o<=7;o++)e+o<=-1||this.moduleCount<=e+o||(this.modules[t+r][e+o]=0<=r&&r<=6&&(0==o||6==o)||0<=o&&o<=6&&(0==r||6==r)||2<=r&&r<=4&&2<=o&&o<=4)},getBestMaskPattern:function(){for(var t=0,e=0,r=0;r<8;r++){this.makeImpl(!0,r);var o=g.getLostPoint(this);(0==r||t>o)&&(t=o,e=r)}return e},createMovieClip:function(t,e,r){var o=t.createEmptyMovieClip(e,r);this.make();for(var i=0;i<this.modules.length;i++)for(var n=1*i,a=0;a<this.modules[i].length;a++){var s=1*a;this.modules[i][a]&&(o.beginFill(0,100),o.moveTo(s,n),o.lineTo(s+1,n),o.lineTo(s+1,n+1),o.lineTo(s,n+1),o.endFill())}return o},setupTimingPattern:function(){for(var t=8;t<this.moduleCount-8;t++)null==this.modules[t][6]&&(this.modules[t][6]=t%2==0);for(var e=8;e<this.moduleCount-8;e++)null==this.modules[6][e]&&(this.modules[6][e]=e%2==0)},setupPositionAdjustPattern:function(){for(var t=g.getPatternPosition(this.typeNumber),e=0;e<t.length;e++)for(var r=0;r<t.length;r++){var o=t[e],i=t[r];if(null==this.modules[o][i])for(var n=-2;n<=2;n++)for(var a=-2;a<=2;a++)this.modules[o+n][i+a]=-2==n||2==n||-2==a||2==a||0==n&&0==a}},setupTypeNumber:function(t){for(var e=g.getBCHTypeNumber(this.typeNumber),r=0;r<18;r++){var o=!t&&1==(e>>r&1);this.modules[Math.floor(r/3)][r%3+this.moduleCount-8-3]=o}for(r=0;r<18;r++){o=!t&&1==(e>>r&1);this.modules[r%3+this.moduleCount-8-3][Math.floor(r/3)]=o}},setupTypeInfo:function(t,e){for(var r=this.errorCorrectLevel<<3|e,o=g.getBCHTypeInfo(r),i=0;i<15;i++){var n=!t&&1==(o>>i&1);i<6?this.modules[i][8]=n:i<8?this.modules[i+1][8]=n:this.modules[this.moduleCount-15+i][8]=n}for(i=0;i<15;i++){n=!t&&1==(o>>i&1);i<8?this.modules[8][this.moduleCount-i-1]=n:i<9?this.modules[8][15-i-1+1]=n:this.modules[8][15-i-1]=n}this.modules[this.moduleCount-8][8]=!t},mapData:function(t,e){for(var r=-1,o=this.moduleCount-1,i=7,n=0,a=this.moduleCount-1;a>0;a-=2)for(6==a&&a--;;){for(var s=0;s<2;s++)if(null==this.modules[o][a-s]){var h=!1;n<t.length&&(h=1==(t[n]>>>i&1)),g.getMask(e,o,a-s)&&(h=!h),this.modules[o][a-s]=h,-1==--i&&(n++,i=7)}if((o+=r)<0||this.moduleCount<=o){o-=r,r=-r;break}}}},e.PAD0=236,e.PAD1=17,e.createData=function(t,r,o){for(var i=m.getRSBlocks(t,r),n=new _,a=0;a<o.length;a++){var s=o[a];n.put(s.mode,4),n.put(s.getLength(),g.getLengthInBits(s.mode,t)),s.write(n)}var h=0;for(a=0;a<i.length;a++)h+=i[a].dataCount;if(n.getLengthInBits()>8*h)throw new Error("code length overflow. ("+n.getLengthInBits()+">"+8*h+")");for(n.getLengthInBits()+4<=8*h&&n.put(0,4);n.getLengthInBits()%8!=0;)n.putBit(!1);for(;!(n.getLengthInBits()>=8*h||(n.put(e.PAD0,8),n.getLengthInBits()>=8*h));)n.put(e.PAD1,8);return e.createBytes(n,i)},e.createBytes=function(t,e){for(var r=0,o=0,i=0,n=new Array(e.length),a=new Array(e.length),s=0;s<e.length;s++){var h=e[s].dataCount,l=e[s].totalCount-h;o=Math.max(o,h),i=Math.max(i,l),n[s]=new Array(h);for(var u=0;u<n[s].length;u++)n[s][u]=255&t.buffer[u+r];r+=h;var f=g.getErrorCorrectPolynomial(l),d=new p(n[s],f.getLength()-1).mod(f);a[s]=new Array(f.getLength()-1);for(u=0;u<a[s].length;u++){var c=u+d.getLength()-a[s].length;a[s][u]=c>=0?d.get(c):0}}var m=0;for(u=0;u<e.length;u++)m+=e[u].totalCount;var _=new Array(m),v=0;for(u=0;u<o;u++)for(s=0;s<e.length;s++)u<n[s].length&&(_[v++]=n[s][u]);for(u=0;u<i;u++)for(s=0;s<e.length;s++)u<a[s].length&&(_[v++]=a[s][u]);return _};for(var r={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},o={L:1,M:0,Q:3,H:2},i=0,n=1,a=2,s=3,h=4,l=5,u=6,f=7,g={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]],G15:1335,G18:7973,G15_MASK:21522,getBCHTypeInfo:function(t){for(var e=t<<10;g.getBCHDigit(e)-g.getBCHDigit(g.G15)>=0;)e^=g.G15<<g.getBCHDigit(e)-g.getBCHDigit(g.G15);return(t<<10|e)^g.G15_MASK},getBCHTypeNumber:function(t){for(var e=t<<12;g.getBCHDigit(e)-g.getBCHDigit(g.G18)>=0;)e^=g.G18<<g.getBCHDigit(e)-g.getBCHDigit(g.G18);return t<<12|e},getBCHDigit:function(t){for(var e=0;0!=t;)e++,t>>>=1;return e},getPatternPosition:function(t){return g.PATTERN_POSITION_TABLE[t-1]},getMask:function(t,e,r){switch(t){case i:return(e+r)%2==0;case n:return e%2==0;case a:return r%3==0;case s:return(e+r)%3==0;case h:return(Math.floor(e/2)+Math.floor(r/3))%2==0;case l:return e*r%2+e*r%3==0;case u:return(e*r%2+e*r%3)%2==0;case f:return(e*r%3+(e+r)%2)%2==0;default:throw new Error("bad maskPattern:"+t)}},getErrorCorrectPolynomial:function(t){for(var e=new p([1],0),r=0;r<t;r++)e=e.multiply(new p([1,d.gexp(r)],0));return e},getLengthInBits:function(t,e){if(1<=e&&e<10)switch(t){case r.MODE_NUMBER:return 10;case r.MODE_ALPHA_NUM:return 9;case r.MODE_8BIT_BYTE:case r.MODE_KANJI:return 8;default:throw new Error("mode:"+t)}else if(e<27)switch(t){case r.MODE_NUMBER:return 12;case r.MODE_ALPHA_NUM:return 11;case r.MODE_8BIT_BYTE:return 16;case r.MODE_KANJI:return 10;default:throw new Error("mode:"+t)}else{if(!(e<41))throw new Error("type:"+e);switch(t){case r.MODE_NUMBER:return 14;case r.MODE_ALPHA_NUM:return 13;case r.MODE_8BIT_BYTE:return 16;case r.MODE_KANJI:return 12;default:throw new Error("mode:"+t)}}},getLostPoint:function(t){for(var e=t.getModuleCount(),r=0,o=0;o<e;o++)for(var i=0;i<e;i++){for(var n=0,a=t.isDark(o,i),s=-1;s<=1;s++)if(!(o+s<0||e<=o+s))for(var h=-1;h<=1;h++)i+h<0||e<=i+h||0==s&&0==h||a==t.isDark(o+s,i+h)&&n++;n>5&&(r+=3+n-5)}for(o=0;o<e-1;o++)for(i=0;i<e-1;i++){var l=0;t.isDark(o,i)&&l++,t.isDark(o+1,i)&&l++,t.isDark(o,i+1)&&l++,t.isDark(o+1,i+1)&&l++,0!=l&&4!=l||(r+=3)}for(o=0;o<e;o++)for(i=0;i<e-6;i++)t.isDark(o,i)&&!t.isDark(o,i+1)&&t.isDark(o,i+2)&&t.isDark(o,i+3)&&t.isDark(o,i+4)&&!t.isDark(o,i+5)&&t.isDark(o,i+6)&&(r+=40);for(i=0;i<e;i++)for(o=0;o<e-6;o++)t.isDark(o,i)&&!t.isDark(o+1,i)&&t.isDark(o+2,i)&&t.isDark(o+3,i)&&t.isDark(o+4,i)&&!t.isDark(o+5,i)&&t.isDark(o+6,i)&&(r+=40);var u=0;for(i=0;i<e;i++)for(o=0;o<e;o++)t.isDark(o,i)&&u++;return r+=10*(Math.abs(100*u/e/e-50)/5)}},d={glog:function(t){if(t<1)throw new Error("glog("+t+")");return d.LOG_TABLE[t]},gexp:function(t){for(;t<0;)t+=255;for(;t>=256;)t-=255;return d.EXP_TABLE[t]},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)},c=0;c<8;c++)d.EXP_TABLE[c]=1<<c;for(c=8;c<256;c++)d.EXP_TABLE[c]=d.EXP_TABLE[c-4]^d.EXP_TABLE[c-5]^d.EXP_TABLE[c-6]^d.EXP_TABLE[c-8];for(c=0;c<255;c++)d.LOG_TABLE[d.EXP_TABLE[c]]=c;function p(t,e){if(void 0==t.length)throw new Error(t.length+"/"+e);for(var r=0;r<t.length&&0==t[r];)r++;this.num=new Array(t.length-r+e);for(var o=0;o<t.length-r;o++)this.num[o]=t[o+r]}function m(t,e){this.totalCount=t,this.dataCount=e}function _(){this.buffer=[],this.length=0}p.prototype={get:function(t){return this.num[t]},getLength:function(){return this.num.length},multiply:function(t){for(var e=new Array(this.getLength()+t.getLength()-1),r=0;r<this.getLength();r++)for(var o=0;o<t.getLength();o++)e[r+o]^=d.gexp(d.glog(this.get(r))+d.glog(t.get(o)));return new p(e,0)},mod:function(t){if(this.getLength()-t.getLength()<0)return this;for(var e=d.glog(this.get(0))-d.glog(t.get(0)),r=new Array(this.getLength()),o=0;o<this.getLength();o++)r[o]=this.get(o);for(o=0;o<t.getLength();o++)r[o]^=d.gexp(d.glog(t.get(o))+e);return new p(r,0).mod(t)}},m.RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12,7,37,13],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]],m.getRSBlocks=function(t,e){var r=m.getRsBlockTable(t,e);if(void 0==r)throw new Error("bad rs block @ typeNumber:"+t+"/errorCorrectLevel:"+e);for(var o=r.length/3,i=[],n=0;n<o;n++)for(var a=r[3*n+0],s=r[3*n+1],h=r[3*n+2],l=0;l<a;l++)i.push(new m(s,h));return i},m.getRsBlockTable=function(t,e){switch(e){case o.L:return m.RS_BLOCK_TABLE[4*(t-1)+0];case o.M:return m.RS_BLOCK_TABLE[4*(t-1)+1];case o.Q:return m.RS_BLOCK_TABLE[4*(t-1)+2];case o.H:return m.RS_BLOCK_TABLE[4*(t-1)+3];default:return}},_.prototype={get:function(t){var e=Math.floor(t/8);return 1==(this.buffer[e]>>>7-t%8&1)},put:function(t,e){for(var r=0;r<e;r++)this.putBit(1==(t>>>e-r-1&1))},getLengthInBits:function(){return this.length},putBit:function(t){var e=Math.floor(this.length/8);this.buffer.length<=e&&this.buffer.push(0),t&&(this.buffer[e]|=128>>>this.length%8),this.length++}};var v=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]];function C(){var t=!1,e=navigator.userAgent;if(/android/i.test(e)){t=!0;var r=e.toString().match(/android ([0-9]\.[0-9])/i);r&&r[1]&&(t=parseFloat(r[1]))}return t}var w=function(){var t=function(t,e){this._el=t,this._htOption=e};return t.prototype.draw=function(t){var e=this._htOption,r=this._el,o=t.getModuleCount();Math.floor(e.width/o),Math.floor(e.height/o);function i(t,e){var r=document.createElementNS("http://www.w3.org/2000/svg",t);for(var o in e)e.hasOwnProperty(o)&&r.setAttribute(o,e[o]);return r}this.clear();var n=i("svg",{viewBox:"0 0 "+String(o)+" "+String(o),width:"100%",height:"100%",fill:e.colorLight});n.setAttributeNS("http://www.w3.org/2000/xmlns/","xmlns:xlink","http://www.w3.org/1999/xlink"),r.appendChild(n),n.appendChild(i("rect",{fill:e.colorLight,width:"100%",height:"100%"})),n.appendChild(i("rect",{fill:e.colorDark,width:"1",height:"1",id:"template"}));for(var a=0;a<o;a++)for(var s=0;s<o;s++)if(t.isDark(a,s)){var 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