百度地图开发：map.setViewport让标注显示在最佳视野内

        //绘制标注;
        function getMaker(markerArr) {
            var allponits=[];
            for (var i = 0; i < markerArr.length; i++) {
                var p0 = markerArr[i].poi_lng;
                var p1 = markerArr[i].poi_lat;
                var cat = 0;
                var txt = markerArr[i].poi_name;
                var pos = new window.BMap.Point(p0, p1)
                var maker = addMarker(pos, cat);
                addInfoWindow(maker, markerArr[i]);
                //文本标签;
                addLabel(pos, txt);
                //设置最佳视野POI;
                allponits.push(pos);
            }
            //console.log(allponits);
            map.setViewport(allponits);
        }

map.setViewport(allponits);