【解决办法】这是Leaflet原生库的问题。在加载图层前，添加以下代码：(function(){
var originalInitTile = L.GridLayer.prototype._initTile
L.GridLayer.include({
_initTile: function (tile) {
originalInitTile.call(this, tile);
var tileSize = this.getTileSize();
tile.style.width = tileSize.x + 1+ 'px';
tile.style.height = tileSize.y +1+ 'px';
}
});
})()
