拖拽时怎么设置当前拖拽项目数？

Question

如题：拖拽时怎么设置当前拖拽项目数？

Answer 1

可以参照以下示例，需要显示多少项，就通过addrecord添加多少项

          .onDragStart((event)=>{
            let video: UDC.Video = new UDC.Video();
            video.videoUri = '/resources/rawfile/01.mp4';
            let data: UDC.UnifiedData = new UDC.UnifiedData(video);
            data.addRecord(video);
            (event as DragEvent).setData(data);
            return this.pixelMapBuilder;
          })