單擊UITextField時如何顯示聯系人？

Question

我已經嘗試過多次創建一個UITextField ，當單擊該UITextField時應顯示設備上可用的聯系人，並檢索電話號碼並將其顯示在文本字段中。 但是我一直無法做到這一點。 我能做的最好的就是使用一個按鈕來接收數字並將其顯示在文本字段上。 這可行！ 單擊UITextField時該如何做？

我在Xcode 10上運行

private let contactPicker = CNContactPickerViewController()
    override func viewDidLoad() {
        super.viewDidLoad()
        configureTextFields()
        configureTapGesture()
        phonenumber.textContentType = .telephoneNumber

     }


    private func configureTextFields() {
        phonenumber.delegate = self

    }

    private func configureTapGesture(){
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(SelfTestTimer.handleTap))
        viewcontact.addGestureRecognizer(tapGesture)

    }

    @objc private func handleTap(){
        viewcontact.endEditing(true)

    }



    @IBAction func pbbbbb(_ sender: Any) {
        contactPicker.delegate = self
        self.present(contactPicker, animated: true, completion: nil)


    }

}
    extension SelfTestTimer: CNContactPickerDelegate {

        func contactPicker(_ picker: CNContactPickerViewController, didSelect contact: CNContact) {


            let phoneNumberCount = contact.phoneNumbers.count

            guard phoneNumberCount > 0 else {
                dismiss(animated: true)

                return
            }

            if phoneNumberCount == 1 {
                setNumberFromContact(contactNumber: contact.phoneNumbers[0].value.stringValue)

            }else{

                let alertController = UIAlertController(title: "Select one of the numbers", message: nil, preferredStyle: .alert)

                for i in 0...phoneNumberCount-1 {
                    let phoneAction = UIAlertAction(title: contact.phoneNumbers[i].value.stringValue, style: .default, handler: {
                        alert -> Void in
                        self.setNumberFromContact(contactNumber: contact.phoneNumbers[i].value.stringValue)
                    })
                    alertController.addAction(phoneAction)
                }
                let cancelAction = UIAlertAction(title: "Cancel", style: .destructive, handler: {
                    alert -> Void in

                })
                alertController.addAction(cancelAction)

                dismiss(animated: true)
                self.present(alertController, animated: true, completion: nil)
            }
        }

        func setNumberFromContact(contactNumber: String) {


            var contactNumber = contactNumber.replacingOccurrences(of: "-", with: "")
            contactNumber = contactNumber.replacingOccurrences(of: "(", with: "")
            contactNumber = contactNumber.replacingOccurrences(of: ")", with: "")
            guard contactNumber.count >= 10 else {
                dismiss(animated: true) {
                    self.presentAlert(alertTitle: "", alertMessage: "A maximum of 10 contacts allowed per session", lastAction: nil)
                }
                return
            }
            phonenumber.text = String(contactNumber.suffix(10))

        }

        func contactPickerDidCancel(_ picker: CNContactPickerViewController) {

        }




}

extension SelfTestTimer: UITextFieldDelegate {
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }


}

我想要這樣，以便在單擊UITextField時出現聯系人，並且在選擇一個聯系人時，該號碼應出現在文本字段中

Answer 1

您應該使用textFieldShouldBeginEditing方法。 使用此方法打開通訊錄控制器，然后返回false ，無需添加手勢識別器。