我是Swift的新手，我正在创建一个注册表单。我有一个电话文本字段，当我打开电话簿时，我看不到完成或返回按钮，因此我可以使用resignfirstresponder()关闭屏幕键盘。
我使用了以下链接：https://gist.github.com/jplazcano87/8b5d3bc89c3578e45c3e
现在，我得到了完成按钮，但是在按完毕后，我的应用程序崩溃了，因为选择器显示未识别。任何人都可以用其他方式帮助或指导我吗？
提前致谢
这是代码
import UIKit
class ViewController: UIViewController, UITextFieldDelegate, UIPickerViewDelegate, UIPickerViewDataSource {
@IBOutlet var registerTF: [KaustabhTF]!
// MARK:- App LifeCycle
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
}
override func viewDidDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK:- User Defined
func isValidEmail(email: String) -> Bool {
let emailRegEx = "^(?:(?:(?:(?: )*(?:(?:(?:\\t| )*\\r\\n)?(?:\\t| )+))+(?: )*)|(?: )+)?(?:(?:(?:[-A-Za-z0-9!#$%&’*+/=?^_'{|}~]+(?:\\.[-A-Za-z0-9!#$%&’*+/=?^_'{|}~]+)*)|(?:\"(?:(?:(?:(?: )*(?:(?:[!#-Z^-~]|\\[|\\])|(?:\\\\(?:\\t|[ -~]))))+(?: )*)|(?: )+)\"))(?:@)(?:(?:(?:[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)(?:\\.[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)*)|(?:\\[(?:(?:(?:(?:(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))\\.){3}(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))))|(?:(?:(?: )*[!-Z^-~])*(?: )*)|(?:[Vv][0-9A-Fa-f]+\\.[-A-Za-z0-9._~!$&'()*+,;=:]+))\\])))(?:(?:(?:(?: )*(?:(?:(?:\\t| )*\\r\\n)?(?:\\t| )+))+(?: )*)|(?: )+)?$"
let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
let result = emailTest.evaluate(with: email)
return result
}
func isValidPassword(pass:String?) -> Bool {
let passwordTest = NSPredicate(format: "SELF MATCHES %@", "(?=.*[A-Z])(?=.*[0-9])(?=.*[a-z]).{8,}")
return passwordTest.evaluate(with: pass)
}
func displayAlert(alertMessage: String) {
let alertController = UIAlertController(title: "Alert!!", message: alertMessage, preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel,handler: nil))
self.present(alertController, animated: true, completion: nil)
}
func addDoneButtonOnKeyboard()
{
let doneToolbar: UIToolbar = UIToolbar()
doneToolbar.barStyle = UIBarStyle.default
let flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
let done: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: Selector(("doneButtonAction")))
var items = [UIBarButtonItem]()
items.append(flexSpace)
items.append(done)
doneToolbar.items = items
doneToolbar.sizeToFit()
self.registerTF[5].inputAccessoryView = doneToolbar
}
func doneButtonAction()
{
self.registerTF[5].resignFirstResponder()
}
func isValidPhone(value: String) -> Bool {
let PHONE_REGEX = "^[0-9]{10}$"
let phoneTest = NSPredicate(format: "SELF MATCHES %@", PHONE_REGEX)
let result = phoneTest.evaluate(with: value)
return result
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true) //This will hide the keyboard
}
let myPickerData = [String](arrayLiteral: "+91", "+971", "+1", "+121", "+80", "+00")
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView( _ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return myPickerData.count
}
func pickerView( _ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return myPickerData[row]
}
func pickerView( _ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
registerTF[4].text = myPickerData[row]
}
func nextTextFieldToFirstResponder(textField: KaustabhTF) {
if textField.absoluteCount() == 0
{
displayAlert(alertMessage: "Please enter the apt value.")
}
let senderTag = textField.tag
if senderTag == 0 // Name
{
registerTF[senderTag + 1].becomeFirstResponder()
}
else if senderTag == 1 // Email
{
if !isValidEmail(email: textField.text!)
{
displayAlert(alertMessage: "Please input your valid email address")
}
else
{
registerTF[senderTag + 1].becomeFirstResponder()
}
}
else if senderTag == 2 // Password
{
if !isValidPassword(pass: textField.text)
{
displayAlert(alertMessage: "Please input a password with minimum of 8 characters including an upper case character, a lower case character and a digit.")
}
else
{
registerTF[senderTag + 1].becomeFirstResponder()
}
}
else if senderTag == 3 // Confirm Password
{
if !isValidPassword(pass: textField.text)
{
displayAlert(alertMessage: "Please input a password with minimum of 8 characters including an upper case character, a lower case character and a digit.")
}
else if registerTF[senderTag-1].text != registerTF[senderTag].text
{
displayAlert(alertMessage: "Password and confirm password dont match. Please try again")
}
else
{
textField.resignFirstResponder()
}
}
else if senderTag == 4 //Country Code
{
let thePicker = UIPickerView()
registerTF[4].inputView = thePicker
thePicker.delegate = self
}
else if senderTag == 5 // Phone Number
{
self.addDoneButtonOnKeyboard()
if !isValidPhone(value: textField.text!)
{
displayAlert(alertMessage: "Please make sure that the phone number is correct")
}
doneButtonAction()
}
}
答案 0 :(得分：2)
替换
Selector(("doneButtonAction"))
带
#selector(ViewController.doneButtonAction)
完整的代码将是：
let done: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: #selector(ViewController.doneButtonAction))
在@objc方法之前添加doneButtonAction，最终代码为：
@objc func doneButtonAction()
{
self.registerTF[5].resignFirstResponder()
}
有关详细信息，请参阅THIS。
答案 1 :(得分：1)
在 swift 3.0和4.0 中，您可以使用此代码。
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var txtNumber: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
self.addDoneButtonOnKeyboard()
}
func addDoneButtonOnKeyboard()
{
let doneToolbar: UIToolbar = UIToolbar(frame: CGRect.init(x: 0, y: 0, width: 320, height: 50))
doneToolbar.barStyle = UIBarStyle.default
let flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
let done: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: #selector(doneButtonAction))
var items = [UIBarButtonItem]()
items.append(flexSpace)
items.append(done)
doneToolbar.items = items
doneToolbar.sizeToFit()
self.txtNumber.inputAccessoryView = doneToolbar
}
**//button action generate following two way both are working great but use any one**
@objc func doneButtonAction()
{
self.txtNumber.resignFirstResponder()
}
@IBAction func doneButtonAction(_ sender: UIButton) {
self.txtNumber.resignFirstResponder()
}
}
答案 2 :(得分：1)
此帖子的可能重复项：How to show "Done" button on iPhone number pad
我试图添加重复标记，但是由于某些原因我不能这样做。希望对其他人有帮助。