var measureline = L.ComputeDist.extend({
            options: {
                toolbarIcon: {
                    html: '<div class="toolbar_measuerline" title="测距"></div>',
                    tooltip: '测距'
                }
            }
        });
          var measurearea = L.ComputeArea.extend({
            options: {
                toolbarIcon: {
                    html: '<div class="toolbar_measuerarea" title="测面"></div>',
                    tooltip: '测面'
                }
            }
        });
      new L.Toolbar.Control({
            position: 'topleft',
            actions: [measureline, measurearea],
        }).addTo(map);