jquery-qrcode在线生成二维码

通过bower进行获取：

y@y:ydkt$ bower install jquery-qrcode --save
bower not-cached    git://github.com/gcusnieux/jquery-qrcode.git#*
bower resolve       git://github.com/gcusnieux/jquery-qrcode.git#*
bower checkout      jquery-qrcode#master
bower resolved      git://github.com/gcusnieux/jquery-qrcode.git#31e056e747
bower install       jquery-qrcode#31e056e747

jquery-qrcode#31e056e747 client/bower_components/jquery-qrcode
y@y:ydkt$ 

使用：

.modal.fade(id="qrcode" role="dialog")
  .modal-dialog
    .modal-content
      .modal-header
        button.close(type="button" data-dismiss="modal" aria-label="Close")
          span(aria-hidden="true") ×
        h4.modal-title 在线生成二维码
      .modal-body
        form(name="qrcodeForm")
          input.form-control(placeholder="请输入内容..." required="true" ng-change="createQrCode()" ng-model="qrcodeInfo")
        br
        #qrcodeCanvas.text-center
      .modal-footer
        button.btn.btn-default(data-dismiss="modal") 关闭

//在线生成二维码
    $scope.createQrCode = function(){
      //首先清除
      jQuery('#qrcodeCanvas').html("");

      if($scope.qrcodeInfo!==undefined){
        jQuery('#qrcodeCanvas').qrcode({
           256,
          height: 256,
          text    : toUtf8($scope.qrcodeInfo)
        });
      }
    };

    //解决二维码中的中文乱码问题
    function toUtf8(str) {
      var out, i, len, c;
      out = "";
      len = str.length;
      for(i = 0; i < len; i++) {
        c = str.charCodeAt(i);
        if ((c >= 0x0001) && (c <= 0x007F)) {
          out += str.charAt(i);
        } else if (c > 0x07FF) {
          out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
          out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));
          out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
        } else {
          out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));
          out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
        }
      }
      return out;
    }