Drop down button working on iPhone simulator but iPad simulator not working

Code Block button = dropDownButton.init(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
        button.setTitle("Rental For".localized, for: .normal)
        button.setTitleColor(.black, for: .normal)
        button.dropView.delegate = self
        button.dropView.layer.cornerRadius = 10
        button.dropView.layer.masksToBounds = true
        self.view.addSubview(button)
        
        //button Constraints
        button.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
        button.topAnchor.constraint(equalTo: self.collectionViewController.bottomAnchor, constant:10).isActive = true
        button.widthAnchor.constraint(equalToConstant: 200).isActive = true
        button.heightAnchor.constraint(equalToConstant: 40).isActive = true
        button.layer.cornerRadius = 10
        button.clipsToBounds = true
        button.translatesAutoresizingMaskIntoConstraints = false
        
        button.dropView.dropDownOptions = ["Work".localized,"Out".localized,"Casual".localized, "Party".localized, "Wedding".localized]