openlayers4中用font设置图标样式

<link rel="stylesheet" type="text/css" href="css/iconfont.css"/>

@charset "utf-8";

@font-face {font-family: "iconfont";
  src: url('./iconfont.woff?t=1502264184772') format('woff'); 
}

        function styleFunc (feature, resolution) {
            var iconFont = 'iconfont';
            var iconFontText = "\S"; // equates to fa-trash icon
            var iconSize = 6 * map.getView().getZoom();
            var col = '#00f';

            var styleIcon = new ol.style.Style({
                text: new ol.style.Text({
                    font: 'Normal ' + iconSize + 'px ' + iconFont,
                    text: iconFontText,
                    fill: new ol.style.Fill({ color: col }),
                    textBaseline: 'bottom'
                })
            });
            return styleIcon;
        }