swift - how to set cornerRadius for only bottom-left,bottom-right and top-left corner textview? -

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how set corner radius only bottom-left,bottom-right , top-left corner textview?

let rectshape = cashapelayer()     rectshape.backgroundcolor = uicolor.redcolor().cgcolor     rectshape.bounds = messages.frame     rectshape.position = messages.center     rectshape.path = uibezierpath(roundedrect: messages.bounds, byroundingcorners: .bottomleft | .topright, cornerradii: cgsize(width: 20, height: 20)).cgpath      messages.layer.addsublayer(rectshape)

this code create 2 rect. dont know why.

you need mask layer shown below:

for swift 3: 

    let rectshape = cashapelayer()     rectshape.bounds = self.myview.frame     rectshape.position = self.myview.center     rectshape.path = uibezierpath(roundedrect: self.myview.bounds, byroundingcorners: [.bottomleft , .bottomright , .topleft], cornerradii: cgsize(width: 20, height: 20)).cgpath       self.myview.layer.backgroundcolor = uicolor.green.cgcolor     //here i'm masking textview's layer rectshape layer      self.myview.layer.mask = rectshape

lower version:

let rectshape = cashapelayer() rectshape.bounds = self.myview.frame rectshape.position = self.myview.center rectshape.path = uibezierpath(roundedrect: self.myview.bounds, byroundingcorners: .bottomleft | .bottomright | .topleft, cornerradii: cgsize(width: 20, height: 20)).cgpath   self.myview.layer.backgroundcolor = uicolor.greencolor().cgcolor //here i'm masking textview's layer rectshape layer  self.myview.layer.mask = rectshape

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