ios - Only Single cell expands at a time in UITableViewCell in swift3 -

i implementing expandable , collapsable table cell on click of button in custom table cell. have tried following code expands single cell @ time. if click cell expands if click on cell expands , expanded cell collapses.

var selectedindexpath: indexpath?  func configure(cell: myproposalcustomcell, forrowatindexpath indexpath: indexpath) {     let pool = myproposalsdetails[indexpath.row]     cell.preservessuperviewlayoutmargins = false     cell.separatorinset = uiedgeinsets.zero     cell.layoutmargins = uiedgeinsets.zero     cell.proposalnumber.text = pool.proposalnumber     cell.pickuplocation.text = pool.pickuplocation     cell.droplocation.text = pool.droplocation     cell.journeytype.text = pool.journeytype     cell.firstshiftonwardtime.text = pool.firstpickuptime     cell.firstshiftreturntime.text = pool.firstendtime     if let numberofinterests = pool.noofinterest {         cell.numberofinterest.text = string(numberofinterests)     }      if let operatingdays = pool.operatingdays {         cell.daysofoperation.attributedtext = utility.getproposedoperatingdays(operatingdays: operatingdays)     }     cell.expandcollapse.tag = indexpath.row     cell.expandcollapse.addtarget(self, action: #selector(expandtablecell(sender:)), for: .touchupinside)     if selectedindexpath == indexpath {         uiview.animate(withduration: 0.3, animations: {             cell.backgroundcolor = customcolor.selectedbackground.color             cell.bottomview.backgroundcolor = customcolor.selectedbackground.color             cell.expandcollapse.setimage(uiimage(named: "collapse_arrow.png"), for: .normal)             if let proposedstartdate = pool.startdate {                 let propstartdate = date(timeintervalsince1970: proposedstartdate)                 cell.proposedstartdate.text = utility.getformatteddate(date: propstartdate)                 cell.proposedstartdatetxt.text = nslocalizedstring("proposed start date", comment: "")             }             cell.returntime.alpha = 0.0         })     } else {         uiview.animate(withduration: 0.3, animations: {             cell.backgroundcolor = uicolor.white             cell.expandcollapse.setimage(uiimage(named: "down_arrow.png"), for: .normal)             cell.proposedstartdatetxt.text = nslocalizedstring("journey type", comment: "")             cell.bottomview.backgroundcolor = uicolor.white             cell.proposedstartdate.text = pool.journeytype             cell.returntime.ishidden = false         })     } } 

this expandable button action:

func expandtablecell(sender: uibutton) {     let indexpath = indexpath(row: sender.tag, section: 0)     if selectedindexpath == indexpath {         selectedindexpath = nil     } else {         let previousselindex = selectedindexpath         selectedindexpath = indexpath         if let previousselectedindexpath = previousselindex {             if tripstatus.triptype != .splitshift {                 if let previousselectedcell = myproposals.cellforrow(at: previousselectedindexpath)   as? myproposalcustomcell {                     configure(cell: previousselectedcell, forrowatindexpath: previousselectedindexpath)                 }             } else {                 if let previousselectedcell = myproposals.cellforrow(at: previousselectedindexpath)   as? myproposalsplitshiftcell {                     configuresplitshift(cell: previousselectedcell, forrowatindexpath: previousselectedindexpath)                 }             }         }     }     updateselectedcell(indexpath: indexpath)     myproposals.beginupdates()     myproposals.endupdates() }  func updateselectedcell(indexpath: indexpath) {     if tripstatus.triptype != .splitshift {         if let selectedcell = myproposals.cellforrow(at: indexpath) as? myproposalcustomcell {             configure(cell: selectedcell, forrowatindexpath: indexpath)         }     } else {         if let selectedcell = myproposals.cellforrow(at: indexpath) as? myproposalsplitshiftcell {             configuresplitshift(cell: selectedcell, forrowatindexpath: indexpath)         }     } }  func tableview(_ tableview: uitableview, heightforrowat indexpath: indexpath) -> cgfloat {     let headingheight: cgfloat = 128     let detailsheight: cgfloat = 80     let splitshiftdetailsheight: cgfloat = 215      switch tripstatus.triptype {      case .onewaytrip, .roundtrip:         if selectedindexpath != nil && indexpath.compare(selectedindexpath! indexpath) == comparisonresult.orderedsame {             return headingheight + detailsheight         }         return headingheight      case .splitshift:         if selectedindexpath != nil && indexpath.compare(selectedindexpath! indexpath) == comparisonresult.orderedsame {             return headingheight + splitshiftdetailsheight         }         return headingheight     } } 

i want multiple cells expanded. how achieve this?

this straight forward, instead of taking selectedindexpath try keep 1 variable in custom uitableviewcell class like,

class expandablecell: uitableviewcell {      var isexpanded: bool = false      override func awakefromnib() {         super.awakefromnib()         // initialization code     }      override func setselected(_ selected: bool, animated: bool) {         super.setselected(selected, animated: animated)          // configure view selected state     }      @ibaction func morebuttontapped(_ sender: any) {     } } 

and try toggle isexpanded boolean flag, , try perform func updateselectedcell(indexpath: indexpath) {} action.