openlayers限制地图拖动的区域

初始化地图的时候加入extent的参数，取最大经纬度，最小经纬度

let maxExtent = ol.extent.boundingExtent([[117.8671000000,39.4475000000]，[116.6747132111,38.9370636460]]);
 map = new ol.Map({
                layers: [...args],
                target: target,
                view: new ol.View({
                    center: ol.proj.transform(mapCenter, "EPSG:4326", "EPSG:3857"),
                    zoom: zoom,
                    minZoom: minZoom,
                    maxZoom: maxZoom,
                    extent: ol.proj.transformExtent(maxExtent, 'EPSG:4326', 'EPSG:3857')
                })
            });

转载自：https://blog.csdn.net/qq_34164814/article/details/85761137