ios - Custom View in xib not working -

i have vpmotpview custom view in `.xib' this.

class verifyotp: uiview {      @iboutlet weak var otpview: vpmotpview!      var emailid = ""     var userid = ""      @ibaction func resendotpaction(_ sender: uibutton) {         print("asdds")     }     override func awakefromnib() {         super.awakefromnib()          otpview.otpfieldscount = 4         otpview.otpfielddefaultbordercolor = uicolor.blue         otpview.otpfieldenteredbordercolor = uicolor.red         otpview.otpfieldborderwidth = 2         otpview.delegate = self          // create ui         otpview.initalizeui()      }  }  extension verifyotp: vpmotpviewdelegate {     func hasenteredallotp(hasentered: bool) {         print("has entered otp? \(hasentered)")     }      func enteredotp(otpstring: string) {         print("otpstring: \(otpstring)")     } } 

then in 'viewcontroller'

var verifyotpview: verifyotp?    self.verifyotpview = verifyotp.fromnib()     self.verifyotpview?.frame = cgrect(x: 20, y: 0, width: screensize.width - 40, height: screensize.height / 3)     self.view.addsubview(self.verifyotpview!) 

but can see resend otp button on screen otpview not displayed.

from screenshot doesn't have constraints set views?

if not try adding constraints , see if fixes problem.