RangeChanged 事件 删除sheet的时候获取不到对应单元格了。
spread.sheets.forEach(sheetObj=>{
sheetObj.bind(GC.Spread.Sheets.Events.RangeChanged,function(e,args){
let sheetName=args.sheetName
let sheet=args.sheet;
let changedCells=args.changedCells
if(changedCells){
changedCells.forEach(c=>{
let cell=sheet.getCell(c.row,c.col);
let cellTag=cell.tag()||{};