UITextField InputView 需要一个完成按钮

Posted 2023-02-24

【中文标题】UITextField InputView 需要一个完成按钮

【英文标题】：UITextField InputView needs a done button

【发布时间】：2016-03-25 03:33:40

【问题描述】：

所以我觉得我在这方面花了很多时间。我有一个UIPickerView，它是通过带有UITextField 的InputView 以编程方式制作的。

我的问题是，我需要这些 UIPickerViews 在辞职第一响应者时有一个完成按钮！

如您所见，我尝试在工具栏上将 var climateToolBar 放在顶部，然后在 viewDidLoad 部分调用climateToolBar。

感谢您的帮助。

这是我的代码：

import UIKit

class ViewController: UIViewController,UIPickerViewDataSource,UIPickerViewDelegate 

    @IBOutlet weak var climateText: UITextField!
    @IBOutlet weak var environmentText: UITextField!
    @IBOutlet weak var regionText: UITextField!
    @IBOutlet weak var budgetText: UITextField!

    var climatePicker = UIPickerView()
    var environmentPicker = UIPickerView()
    var regionPicker = UIPickerView()
    var budgetPicker = UIPickerView()

    var climateToolBar = UIToolbar()



    //MARK: Arrays for PickerViews
    var climates = ["Hot","Warm","Cold","Anywhere"]
    var environment = ["Beach","City","Mountain","Rural", "Anywhere"]
    var region = ["Central America","Carribean","Europe","North America","South America", "Anywhere"]
    var budget = ["$0-$500","$501-$1000","$1001-$1500","$1501-$2500","$2501 and up"]


    override func viewDidLoad() 
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        climatePicker.tag = 0
        environmentPicker.tag = 1
        regionPicker.tag = 2
        budgetPicker.tag = 3

        climateText.inputView = climatePicker
        climateText.inputAccessoryView = climateToolBar
        environmentText.inputView = environmentPicker
        regionText.inputView = regionPicker
        budgetText.inputView = budgetPicker

        climatePicker.delegate = self
        environmentPicker.delegate = self
        regionPicker.delegate = self
        budgetPicker.delegate = self

        climatePicker.dataSource = self
        environmentPicker.dataSource = self
        regionPicker.dataSource = self
        budgetPicker.dataSource = self


       climateToolBar = UIToolbar()
        climateToolBar.barStyle = UIBarStyle.Default
        climateToolBar.translucent = true
        climateToolBar.sizeToFit()

    


    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int 
        return 1
    


    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int 
        if climatePicker.tag == 0 
            return climates.count
         else if environmentPicker.tag == 1 
            return environment.count
         else if regionPicker.tag == 2 
            return region.count
         else if budgetPicker.tag == 3 
            return budget.count
        
        return 1
    

    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? 
        if pickerView.tag == 0 
            return climates[row]
         else if pickerView.tag == 1 
            return environment[row]
         else if pickerView.tag == 2 
            return region[row]
         else if pickerView.tag == 3 
            return budget[row]
        
        return ""
    


    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) 
        if pickerView.tag == 0 
            climateText.text = climates[row]
         else if pickerView.tag == 1 
            environmentText.text = environment[row]
         else if pickerView.tag == 2 
            regionText.text = region[row]
         else if pickerView.tag == 3 
            budgetText.text = budget[row]
        
    

    override func didReceiveMemoryWarning() 
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    

【参考方案1】：

像这样添加：

let pickerView = UIPickerView(frame: CGRectMake(0, 200, view.frame.width, 300))
pickerView.backgroundColor = .whiteColor()
pickerView.showsSelectionIndicator = true

let 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()


let doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Bordered, target: self, action: "donePicker")
let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
let cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Bordered, target: self, action: "canclePicker")

toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
toolBar.userInteractionEnabled = true

textField.inputView = pickerView
textField.inputAccessoryView = toolBar

【讨论】：

我不久前在另一个字符串中看到了这段代码，我不确定如何将 let 值实现为 swift。

另外，我是否声称视图上方的工具栏将部分加载为 var？

是的，你可以，但因为它是一个常数，它应该是'让'。

明白了。好吧，这个问题对我来说很轻松，因为我对这一切还很陌生，并试图重新学习编码，但我是否将所有这些都放在视图下加载？

是的，可以放在viewDidLoad中