我有 uiviewcontroller 和 uitextfields，当用户点击文本字段时 uipickerview 出现，如附件所示。
如何制作多个uipickerview？例如，当用户点击国家文本字段时，pickerview 会显示国家数组数据，当用户点击性别文本字段时，uipickerview 会显示性别数组数据等。我试过但只能对一个数组执行此操作，该数组是我的代码中显示的国家/地区。如果您能告诉我如何为其余的 uitextfield 执行此操作，我将不胜感激。
import UIKit
class testVC: UIViewController,UITextViewDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate,UIPickerViewDelegate,UIPickerViewDataSource {
var countries = ["USA","UK","Spain" ]
var gender = ["Male","Female","Both"]
var language = ["English","French","Spanish","Other"]
override func viewDidLoad() {
super.viewDidLoad()
var pickerView = UIPickerView(frame: CGRectMake(0, 200, view.frame.width, 100))
pickerView.backgroundColor = .whiteColor()
pickerView.showsSelectionIndicator = true
var toolBar = UIToolbar()
toolBar.barStyle = UIBarStyle.Default
toolBar.translucent = true
toolBar.tintColor = UIColor(red: 76/255, green: 217/255, blue: 100/255, alpha: 1)
toolBar.sizeToFit()
pickerView.delegate = self
pickerView.dataSource = self
[![enter image description here][1]][1]
var doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Plain, target: self, action: "donePicker")
var spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
var cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "canclePicker")
toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
toolBar.userInteractionEnabled = true
genderTxt.inputView = pickerView
genderTxt.inputAccessoryView = toolBar
countriesTxt.inputView = pickerView
countriesTxt.inputAccessoryView = toolBar
categoriesTxt.inputView = pickerView
categoriesTxt.inputAccessoryView = toolBar
startDateTxt.inputView = pickerView
startDateTxt.inputAccessoryView = toolBar
endDateTxt.inputView = pickerView
endDateTxt.inputAccessoryView = toolBar
languageTxt.inputView = pickerView
languageTxt.inputAccessoryView = toolBar
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return countries.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return countries[row]
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
var itemselected = countries[row]
countriesTxt.text = itemselected
}
最佳答案
您不需要多个 UIPickerView。相反，您需要根据第一响应者 TextView 设置选择器 View 数据源。您还应该实现 textFieldShouldBeginEditing 委托(delegate)方法，通过调用其 reloadAllComponents 方法来重新加载选择器 View 的内容
var pickerView : UIPickerView!
override func viewDidLoad() {
self.pickerView = UIPickerView(frame: CGRectMake(0, 200, view.frame.width, 100))
NSNotificationCenter.defaultCenter().addObserver(self, selector: ("updatePicker"), name: UITextFieldTextDidBeginEditingNotification, object: nil)
}
func updatePicker(){
self.pickerView.reloadAllComponents()
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if countriesTxt.isFirstResponder(){
return countries.count
}else if genderTxt.isFirstResponder(){
return gender.count
}
// continue this way and implement all cases
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
if countriesTxt.isFirstResponder(){
return countries[row]
}else if genderTxt.isFirstResponder(){
return gender[row]
}
// continue this way and implement all cases
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if countriesTxt.isFirstResponder(){
var itemselected = countries[row]
countriesTxt.text = itemselected
}else if genderTxt.isFirstResponder(){
var itemselected = gender[row]
genderTxt.text = itemselected
}
// ...
}
关于swift - 如何在 Swift 中为多个 UIpickerview 设置数据？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32010730/