使用UITextField + UIPickerview时禁用键盘输入
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？ 所以请在下面选择我的选择。
如果单击文本字段，则打开选择器视图：
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, 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() } } 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。
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领域，您肯定应该与Hedgehog先生一起回答 。
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 ，请尝试以下操作：
class PickerBasedTextField: UITextField { override func caretRect(for position: UITextPosition) -> CGRect { return CGRect.zero } }
如果要阻止用户使用paste操作，可以创建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) } }
这是一个行动清单的文档 。