这个用的下面的代码添加的遮罩出现的问题
var vectorLayer = new ol.layer.VectorTile({
source: new ol.source.VectorTileSuperMapRest(vectorTileOptions),
style: function (feature, resolution) {
return new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'rgba(255, 255, 255, 0.8)',
width: 1
}),
fill: new ol.style.Fill({
color: "rgba(255, 255, 255,0.7)"
})
})
}
})