ios - Delete button not showing on UITableViewCell with rounded corners -

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in tableview, have logic in tableview(tableview: uitableview, willdisplaycell cell: uitableviewcell, forrowatindexpath indexpath: nsindexpath) determine if cell has rounded corners on top, bottom, or no rounded corners @ all. 

override func tableview(tableview: uitableview, willdisplaycell cell: uitableviewcell, forrowatindexpath indexpath: nsindexpath) {          if indexpath.row == 0 {             // round top 2 corners             let masklayer = cashapelayer()             masklayer.path = uibezierpath(roundedrect: cell.bounds, byroundingcorners: [uirectcorner .topleft, uirectcorner .topright], cornerradii: cgsizemake(4, 4)).cgpath             cell.layer.mask = masklayer         }          if indexpath.section != 1 {              if indexpath.row == self.tableview.numberofrowsinsection(indexpath.section) - 1 {                 let masklayer = cashapelayer()                 masklayer.path = uibezierpath(roundedrect: cell.bounds, byroundingcorners: [uirectcorner .bottomleft, uirectcorner .bottomright], cornerradii: cgsizemake(4, 4)).cgpath                 cell.layer.mask = masklayer             }         }      }

this works, after have implemented editing tableview, strange things happen delete button.

with rounded corners code:

with rounded corners

when remove rounded corners:

without rounded corners

this confuses me because i'm not sure i'm doing wrong. can help?

override func tableview(tableview: uitableview, willdisplaycell cell: uitableviewcell, forrowatindexpath indexpath: nsindexpath) {          if indexpath.row == 0 {             // round top 2 corners             let masklayer = cashapelayer()             masklayer.path = uibezierpath(roundedrect: cell.bounds, byroundingcorners: [uirectcorner .topleft, uirectcorner .topright], cornerradii: cgsizemake(4, 4)).cgpath             cell.contentview.layer.mask = masklayer         }          if indexpath.section != 1 {              if indexpath.row == self.tableview.numberofrowsinsection(indexpath.section) - 1 {                 let masklayer = cashapelayer()                 masklayer.path = uibezierpath(roundedrect: cell.bounds, byroundingcorners: [uirectcorner .bottomleft, uirectcorner .bottomright], cornerradii: cgsizemake(4, 4)).cgpath                 cell.contentview.layer.mask = masklayer             }         }      }

use cell.contentview.layer.mask = masklayer


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