使用 UITextField + UIPickerview 时禁用键盘输入
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【中文标题】使用 UITextField + UIPickerview 时禁用键盘输入【英文标题】：Disabling keyboard input when using a UITextField + UIPickerview 【发布时间】：2017-04-28 20:12:24 【问题描述】：这个项目同样点击textfield pickerview打开，但是上面显示的数据可以在section中输入。我怎样才能关闭它？因此，请在下面进行我的选择。
如果文本框被点击，我打开pickerview：
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()
【问题讨论】：
【参考方案1】：你可以实现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。
【讨论】：
好答案，应该可以解决问题！请在下面查看我的答案以获取更多考虑。快乐的黑客攻击！ 如果您还在寻找修复该空白插入符的方法，这里是另一个修复该问题的 SO***.com/questions/39503873/…【参考方案2】：这不是真正的问题当在真正的 iPhone 设备上运行时，因为没有可用的键盘来进行打字:)
这似乎只是在 ios 模拟器上运行时出现的问题，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，您绝对应该使用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，也可以试试这个：
class PickerBasedTextField: UITextField
override func caretRect(for position: UITextPosition) -> CGRect
return CGRect.zero
【讨论】：
【参考方案3】：如果您想阻止用户使用paste 操作，您可以创建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doc 操作列表。
【讨论】：
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