我的以下代码具有两个不同的文本字段ana和sampleTextfield。现在，sampleTextfield可以完美地调用arrray firstHit。但是我试图找出如何进行模拟调用并显示数组secondHit。现在，sampleTextfield被标记为1，而ana被标记为2。我认为标记是实现此目的的最佳方法。
import UIKit
class ViewController: UIViewController,UIPickerViewDelegate, UIPickerViewDataSource {
let myBUtton = UIButton()
@IBOutlet var ana : UITextField!
@IBOutlet var sampleTextField: UITextField!
var initialc:[NSLayoutConstraint] = []
var buttonCons:[NSLayoutConstraint] = []
var textCons:[NSLayoutConstraint] = []
var textCons2:[NSLayoutConstraint] = []
var textAna:[NSLayoutConstraint] = []
var selecteDay : String?
let firstHit = ["","X","9","8","7","6","5","4","3","2","1","0"]
let secondHit = ["\\","9","8","7","6","5","4","3","2","1","0"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
createToolBar()
createDayPicker()
sampleTextField.placeholder = "Enter text here"
sampleTextField.font = UIFont.systemFont(ofSize: 15)
sampleTextField.translatesAutoresizingMaskIntoConstraints = false
sampleTextField.borderStyle = UITextBorderStyle.roundedRect
sampleTextField.autocorrectionType = UITextAutocorrectionType.no
sampleTextField.keyboardType = UIKeyboardType.default
sampleTextField.returnKeyType = UIReturnKeyType.done
sampleTextField.clearButtonMode = UITextFieldViewMode.whileEditing;
sampleTextField.contentVerticalAlignment = UIControlContentVerticalAlignment.center
self.view.addSubview(sampleTextField)
ana.placeholder = "Enter text here"
ana.font = UIFont.systemFont(ofSize: 15)
ana.translatesAutoresizingMaskIntoConstraints = false
ana.borderStyle = UITextBorderStyle.roundedRect
ana.autocorrectionType = UITextAutocorrectionType.no
ana.keyboardType = UIKeyboardType.default
ana.returnKeyType = UIReturnKeyType.done
ana.clearButtonMode = UITextFieldViewMode.whileEditing;
ana.contentVerticalAlignment = UIControlContentVerticalAlignment.center
self.view.addSubview(ana)
sampleTextField.translatesAutoresizingMaskIntoConstraints = false
let leadingc2 = sampleTextField.widthAnchor.constraint(equalToConstant: 80)
let trailingC2 = sampleTextField.heightAnchor.constraint(equalToConstant: 40)
let topc2 = sampleTextField.centerXAnchor.constraint(equalTo: self.view.centerXAnchor, constant: -70)
let bottomc2 = sampleTextField.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -250)
textCons = [leadingc2,trailingC2,topc2,bottomc2]
let leadingc2a = ana.widthAnchor.constraint(equalToConstant: 80)
let trailingC2a = ana.heightAnchor.constraint(equalToConstant: 40)
let topc2a = ana.centerXAnchor.constraint(equalTo: self.view.centerXAnchor, constant: 70)
let bottomc2a = ana.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -250)
textAna = [leadingc2a,trailingC2a,topc2a,bottomc2a]
ana.backgroundColor = .gray
NSLayoutConstraint.activate(textCons)
NSLayoutConstraint.activate(textAna)
}
func createDayPicker () {
let dayPicker = UIPickerView()
dayPicker.tag = 0
dayPicker.delegate = self
dayPicker.backgroundColor = .black
sampleTextField.inputView = dayPicker
}
func createToolBar() {
let toolbar = UIToolbar()
toolbar.sizeToFit()
let doneButonnt = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(ViewController.cancle))
toolbar.setItems([doneButonnt], animated: false)
toolbar.isUserInteractionEnabled = true
sampleTextField.inputAccessoryView = toolbar
}
@objc func cancle() {
view.endEditing(true)
if sampleTextField.text == "X"{
ana.isHidden = true
sampleTextField.backgroundColor = .red
NSLayoutConstraint.deactivate(textCons)
NSLayoutConstraint.deactivate(textAna)
sampleTextField.translatesAutoresizingMaskIntoConstraints = false
let leadingc2 = sampleTextField.widthAnchor.constraint(equalToConstant: 80)
let trailingC2 = sampleTextField.heightAnchor.constraint(equalToConstant: 40)
let topc2 = sampleTextField.centerXAnchor.constraint(equalTo: self.view.centerXAnchor, constant: -70)
let bottomc2 = sampleTextField.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -250)
let rightCona = sampleTextField.rightAnchor.constraint(equalTo: self.view.rightAnchor)
let leftCona = sampleTextField.leadingAnchor.constraint(equalTo: self.view.leadingAnchor)
textCons2 = [leadingc2,trailingC2,topc2,bottomc2,rightCona,leftCona]
NSLayoutConstraint.activate(textCons2)
}
else {
NSLayoutConstraint.deactivate(textCons2)
ana.isHidden = false
sampleTextField.translatesAutoresizingMaskIntoConstraints = false
let leadingc2 = sampleTextField.widthAnchor.constraint(equalToConstant: 80)
let trailingC2 = sampleTextField.heightAnchor.constraint(equalToConstant: 40)
let topc2 = sampleTextField.centerXAnchor.constraint(equalTo: self.view.centerXAnchor, constant: -70)
let bottomc2 = sampleTextField.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -250)
textCons = [leadingc2,trailingC2,topc2,bottomc2]
let leadingc2a = ana.widthAnchor.constraint(equalToConstant: 80)
let trailingC2a = ana.heightAnchor.constraint(equalToConstant: 40)
let topc2a = ana.centerXAnchor.constraint(equalTo: self.view.centerXAnchor, constant: 70)
let bottomc2a = ana.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -250)
textAna = [leadingc2a,trailingC2a,topc2a,bottomc2a]
ana.backgroundColor = .gray
NSLayoutConstraint.activate(textCons)
NSLayoutConstraint.activate(textAna)
}
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return firstHit.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return firstHit[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
selecteDay = firstHit[row]
sampleTextField.text = selecteDay
}
func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
var lable: UILabel
if let view = view as? UILabel {
lable = view
} else {
lable = UILabel()
}
lable.textColor = .white
lable.textAlignment = .center
lable.font = UIFont(name: "Menlo-Regular", size: 17)
lable.text = firstHit[row]
return lable
}
}
最佳答案
我可以想到的一种方法如下：
import UIKit
//Indicator to indicate which field is currently active at the moment
enum ActiveField {
case ana
case sample
}
//protocol that different source will be using or conforms to
protocol PickerData {
var source: [String] { get }
var active: ActiveField { get }
}
//The first source
struct FirstHit: PickerData {
var source: [String]
var active: ActiveField
}
//The second source
struct SecondHit: PickerData {
var source: [String]
var active: ActiveField
}
class ViewController: UIViewController, UITextFieldDelegate {
let myBUtton = UIButton()
@IBOutlet var ana : UITextField!
@IBOutlet var sampleTextField: UITextField!
//These are the actual data received or manually set as the case here
let firstHit = FirstHit(source: ["","X","9","8","7","6","5","4","3","2","1","0"], active: .ana)
let secondHit = SecondHit(source: ["\\","9","8","7","6","5","4","3","2","1","0"], active: .sample)
//This one will be used to determine the title displayed in picker view
var pickerDataSource: PickerData!
//We will use this pickerview for all inputs view
var dayPicker: UIPickerView!
// MARK: - LifeCycle
override func viewDidLoad() {
super.viewDidLoad()
//1. create the pickerView
createDayPicker()
//2. create the toolbar
createToolBar()
//3. set the pickerview as input to textFields (same pickerview)
ana.inputView = dayPicker
sampleTextField.inputView = dayPicker
//4. set the textField delegate so that when they become active we know what source to use
ana.delegate = self
sampleTextField.delegate = self
}
func createDayPicker () {
dayPicker = UIPickerView()
dayPicker.delegate = self
dayPicker.dataSource = self
dayPicker.backgroundColor = .black
}
func createToolBar() {
let toolbar = UIToolbar()
toolbar.sizeToFit()
let doneButonnt = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(ViewController.cancle))
toolbar.setItems([doneButonnt], animated: false)
toolbar.isUserInteractionEnabled = true
sampleTextField.inputAccessoryView = toolbar
ana.inputAccessoryView = toolbar
}
@objc func cancle() {
view.endEditing(true)
//...Do stuff
}
// MARK: - TextField Delegate
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
//set the appropriate source
if textField == ana {
pickerDataSource = firstHit
} else if textField == sampleTextField {
pickerDataSource = secondHit
}
//reload picker
dayPicker.reloadAllComponents()
return true
}
}
只是将pickerView委托和dataSource分开进行扩展
extension ViewController: UIPickerViewDelegate, UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1 //since we only have one component to display
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerDataSource.source.count //the count of element inside source
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return pickerDataSource.source[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
//to know which field is active so that we can identify and set value to that field we are using ActivePicker
switch pickerDataSource.active {
case .ana:
ana.text = pickerDataSource.source[row]
case .sample:
sampleTextField.text = pickerDataSource.source[row]
}
}
func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
var lable: UILabel
if let view = view as? UILabel {
lable = view
} else {
lable = UILabel()
}
lable.textColor = .white
lable.textAlignment = .center
lable.font = UIFont(name: "Menlo-Regular", size: 17)
lable.text = pickerDataSource.source[row]
return lable
}
}