使用UITextField + UIPickerview时禁用键盘输入
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此项目还会单击文本字段选择器视图打开，但上面显示的数据可以在该部分中输入。我怎么能把它关掉？所以请在下面做出我的选择。
如果单击文本字段，则打开uipickerview：
import UIKit
import NVActivityIndicatorView
struct kategoriData {
var text : String?
var id : String?
}
class KonuEkleViewController: UIViewController,UITextFieldDelegate , NVActivityIndicatorViewable , UIPickerViewDataSource , UIPickerViewDelegate{
@IBOutlet weak var txtBaslik: UITextField!
@IBOutlet weak var txtYazi: UITextView!
@IBOutlet weak var txtLink: UITextField!
@IBOutlet weak var btnKonuAc: UIButton!
@IBOutlet weak var txtKategoriSecimi: UITextField!
let size = CGSize(width: 30, height: 30)
let singleton = Global.sharedGlobal
let ConnectString = Connect.ConnectInfo
var kategoriList = [kategoriData]()
let GirisView = GirisViewController()
var secilenKategori : String?
var dbKategoriIsim : String?
var dbKategoriId:String?
override func viewDidLoad() {
super.viewDidLoad()
txtKategoriSecimi.text = "Kategoriyi Seçiniz"
KategoriGetir()
pickerGrafik()
txtYazi.layer.cornerRadius = 10
btnKonuAc.layer.cornerRadius = 10
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(GirisViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
}
func dismissKeyboard() {
view.endEditing(true)
}
@IBAction func btnKonuEkle(_ sender: Any) {
GirisView.LoadingIcon(tur: 0)
if txtBaslik.text != "" && txtYazi.text != "" && secilenKategori != nil && txtKategoriSecimi.text != "Kategoriyi Seçiniz"
{
KonuEkle(uye: singleton.username, baslik: txtBaslik.text!, mesaj: txtYazi.text, kategori: secilenKategori!, link: txtLink.text!)
}
else
{
GirisView.Bildiri(baslik: "UYARI", mesaj: "Boş Alanları Doldurunuz", tur: 1)
}
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 1.0) {
self.GirisView.LoadingIcon(tur: 1)
}
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func KonuEkle(uye:String , baslik:String ,mesaj:String , kategori:String , link:String)
{
var request = URLRequest(url: URL(string:ConnectString.conString + "/KonuEkle")!)
request.httpMethod = "POST"
var postString = "uye="+uye+"&&baslik="+baslik+"&&mesaj="+mesaj+"&&kategori="+kategori+"&&link="+link
postString = postString.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)!
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if error != nil
{
print("error")
}
if let urlContent = data
{
do
{
let jsonResult = try JSONSerialization.jsonObject(with: urlContent, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
print(jsonResult)
if let gelenDizi = jsonResult as? NSArray
{
for i in 0..<gelenDizi.count
{
if let gelenMesaj = (gelenDizi[i] as? NSDictionary)?["mesaj"] as? String
{
DispatchQueue.main.async {
self.Sonuc(mesaj:gelenMesaj)
}
}
}
}
}
catch
{
print("server hatası")
}
}
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 1.0) {
self.GirisView.LoadingIcon(tur: 1)
}
}
task.resume()
}
func Sonuc(mesaj:String)
{
var mesajSonuc = ""
var mesajBaslik = ""
if mesaj == "basarili"
{
mesajSonuc = "Konu Açıldı"
mesajBaslik = "Bilgi"
}
else
{
mesajSonuc = "Bir Hata Oluştu Lütfen Destek Bölümünden Bize Ulaşın"
mesajBaslik = "Uyarı"
}
let appearance = SCLAlertView.SCLAppearance(showCloseButton: false)
let alert = SCLAlertView(appearance: appearance)
_ = alert.addButton("Tamam") {
self.txtLink.text = ""
self.txtYazi.text = ""
self.txtBaslik.text = ""
self.navigationController!.popViewController(animated: true)
}
if mesajBaslik == "Bilgi"
{
_ = alert.showSuccess(mesajBaslik, subTitle:mesajSonuc)
}
else
{
_ = alert.showNotice(mesajBaslik, subTitle:mesajSonuc)
}
}
func pickerGrafik()
{
let pickerView = UIPickerView()
pickerView.delegate = self
txtKategoriSecimi.inputView = pickerView
let toolBar = UIToolbar(frame: CGRect(x: 0, y: self.view.frame.size.height/6, width: self.view.frame.size.width, height: 40.0))
toolBar.layer.position = CGPoint(x: self.view.frame.size.width/2, y: self.view.frame.size.height-20.0)
toolBar.barStyle = UIBarStyle.blackTranslucent
toolBar.tintColor = UIColor.white
toolBar.backgroundColor = UIColor.black
let defaultButton = UIBarButtonItem(title: "İptal", style: UIBarButtonItemStyle.plain, target: self, action: #selector(KonuEkleViewController.tappedToolBarBtn))
let doneButton = UIBarButtonItem(title: "Tamam", style: UIBarButtonItemStyle.done, target: self, action: #selector(KonuEkleViewController.donePressed))
let flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: self, action: nil)
let label = UILabel(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width / 3, height: self.view.frame.size.height))
label.font = UIFont(name: "Helvetica", size: 12)
label.backgroundColor = UIColor.clear
label.textColor = UIColor.white
label.text = "Kategoriyi Seçiniz"
label.textAlignment = NSTextAlignment.center
let textBtn = UIBarButtonItem(customView: label)
toolBar.setItems([defaultButton,flexSpace,textBtn,flexSpace,doneButton], animated: true)
txtKategoriSecimi.inputAccessoryView = toolBar
}
func donePressed(_ sender: UIBarButtonItem) {
txtKategoriSecimi.resignFirstResponder()
}
func tappedToolBarBtn(_ sender: UIBarButtonItem) {
txtKategoriSecimi.resignFirstResponder()
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return kategoriList.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return kategoriList[row].text
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
txtKategoriSecimi.text = kategoriList[row].text
secilenKategori = kategoriList[row].id
}
func KategoriGetir()
{
kategoriList.removeAll()
//SADECE 1 DEFA EKLENIYOR
self.kategoriList.append(kategoriData.init(text: "Kategoriyi Seçiniz", id: "1"))
GirisView.LoadingIcon(tur: 0)
var request = URLRequest(url: URL(string:ConnectString.conString + "/KategoriGetir")!)
request.httpMethod = "POST"
var postString = "tur=1&&kategori="
postString = postString.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)!
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if error != nil
{
print("error")
}
if let urlContent = data
{
do
{
let jsonResult = try JSONSerialization.jsonObject(with: urlContent, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
print(jsonResult)
if let gelenDizi = jsonResult as? NSArray
{
for i in 0..<gelenDizi.count
{
if let gelenKategori = (gelenDizi[i] as? NSDictionary)?["kategoriisim"] as? String
{
self.dbKategoriIsim = gelenKategori
}
if let gelenId = (gelenDizi[i] as? NSDictionary)?["id"] as? String
{
self.dbKategoriId = gelenId
}
self.kategoriList.append(kategoriData.init(text: self.dbKategoriIsim, id: self.dbKategoriId))
}
}
}
catch
{
print("error")
}
}
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now()) {
self.GirisView.LoadingIcon(tur: 1)
}
}
task.resume()
}
}
答案
您可以实现UITextFieldDelegate方法：
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool
返回false以防止手动输入任何字符。
另一答案
在真正的iPhone设备上运行时，这不是一个实际问题，因为没有键盘可用于输入:)
这在ios模拟器上运行时似乎只是一个问题，因为您也可以使用Mac键盘。
话虽如此，如果您仍想阻止文本输入到您的字段，您肯定应该使用Mr. Hedgehog answer。
如果除了阻止输入之外，您可能还想隐藏文本字段上的插入符号，请尝试以下操作：
class PickerBasedTextField: UITextField {
override func caretRect(for position: UITextPosition) -> CGRect {
return CGRect.zero
}
}
另一答案
如果你想阻止用户使用paste动作，你可以创建一个UITextField的子类来覆盖canPerformAction。
public class PickerUITextField: UITextField {
override public func canPerformAction(_ action: Selector, withSender
sender: Any?) -> Bool {
if action == #selector(UIResponderStandardEditActions.paste(_:)) {
return false
}
return super.canPerformAction(action, withSender: sender)
}
}
这是一个doc列表的行动。
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