我已将 View Controller 设置为具有 5 个带有 5 个标签的按钮和一个选择器 View 。我希望将其设置为单击每个按钮后，它将根据选择的按钮拉起选取器 View ，然后选择的选项将显示在按钮旁边的标签中。
为了解决这个问题，我所做的就是我将所有按钮和标签都通过 io socket 连接到我的 swift 文件上，然后我真的不知道之后还能做什么。
我研究过是否有其他指南可以连接按钮+pickerview+标签的所有三个变量，但没有一个指南使用按钮作为触发器。
import UIKit
class CalculatorViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
@IBOutlet weak var firstButton: UIButton!
@IBOutlet weak var secondButton: UIButton!
@IBOutlet weak var thirdButton: UIButton!
@IBOutlet weak var fourthButton: UIButton!
@IBOutlet weak var fifthButton: UIButton!
@IBOutlet weak var firstTextField: UITextField!
@IBOutlet weak var secondTextField: UITextField!
@IBOutlet weak var thirdTextField: UITextField!
@IBOutlet weak var fourthTextField: UITextField!
@IBOutlet weak var fifthTextField: UITextField!
@IBOutlet weak var pickerView: UIPickerView!
var lastPressedButton: UIButton
override func viewDidLoad() {
super.viewDidLoad()
firstButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
secondButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
thirdButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
fourthButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
fifthButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
self.pickerView.dataSource = self;
self.pickerView.delegate = self;
}
func buttonAction(sender:UIButton!) {
lastPressedButton = sender
if lastPressedButton == firstButton {
firstTextField.inputView = pickerView
} else if lastPressedButton == secondButton {
secondTextField.inputView = pickerView
}
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if lastPressedButton == firstButton {
return firstButtonDataSource.count
} else if lastPressedButton == secondButton {
return secondButtonDataSource.count
}
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
if lastPressedButton == firstButton {
return firstButtonDataSource[row]
} else if lastPressedButton == secondButton {
return secondButtonDataSource[row]
}
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if lastPressedButton == first {
self.firstTextField.text = firstButtonDataSource[row]
} else if lastPressedButton == secondButton {
self.secondTextField.text = firstButtonDataSource[row]
}
}
}
最佳答案
我认为您正在寻找类似于以下内容的内容:
更新:
class CalculatorViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
@IBOutlet weak var firstButton: UIButton!
@IBOutlet weak var secondButton: UIButton!
@IBOutlet weak var thirdButton: UIButton!
@IBOutlet weak var fourthButton: UIButton!
@IBOutlet weak var fifthButton: UIButton!
@IBOutlet weak var firstTextField: UITextField!
@IBOutlet weak var secondTextField: UITextField!
@IBOutlet weak var thirdTextField: UITextField!
@IBOutlet weak var fourthTextField: UITextField!
@IBOutlet weak var fifthTextField: UITextField!
@IBOutlet weak var pickerView: UIPickerView!
var firstButtonDataSource = ["1", "2", "3", "4"];
var secondButtonDataSource = ["White", "Red", "Green", "Blue"];
var thirdButtonDataSource = ["Mike", "Steve", "Ben", "Peter"];
var fourthButtonDataSource = ["Large", "Medium", "Small", "Extra-small"];
var fithButtonDataSource = ["USA", "UK", "France", "Germany"];
var lastPressedButton: UIButton?
override func viewDidLoad() {
super.viewDidLoad()
firstButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
secondButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
thirdButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
fourthButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
fifthButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
self.pickerView.dataSource = self;
self.pickerView.delegate = self;
}
@objc func buttonClicked(sender:UIButton!) {
lastPressedButton = sender
if lastPressedButton == firstButton {
firstTextField.inputView = pickerView
} else if lastPressedButton == secondButton {
secondTextField.inputView = pickerView
} else if lastPressedButton == thirdButton {
thirdTextField.inputView = pickerView
} else if lastPressedButton == fourthButton {
fourthTextField.inputView = pickerView
} else if lastPressedButton == fifthButton {
fifthTextField.inputView = pickerView
}
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if lastPressedButton == firstButton {
return firstButtonDataSource.count;
} else if lastPressedButton == secondButton {
return secondButtonDataSource.count;
} else if lastPressedButton == thirdButton {
return thirdButtonDataSource.count;
} else if lastPressedButton == fourthButton {
return fourthButtonDataSource.count;
} else if lastPressedButton == fifthButton {
return fithButtonDataSource.count;
}
return 0
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if lastPressedButton == firstButton {
return firstButtonDataSource[row];
} else if lastPressedButton == secondButton {
return secondButtonDataSource[row];
} else if lastPressedButton == thirdButton {
return thirdButtonDataSource[row];
} else if lastPressedButton == fourthButton {
return fourthButtonDataSource[row];
} else if lastPressedButton == fifthButton {
return fithButtonDataSource[row];
}
return ""
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if lastPressedButton == firstButton {
self.firstTextField.text = firstButtonDataSource[row]
} else if lastPressedButton == secondButton {
self.secondTextField.text = secondButtonDataSource[row]
} else if lastPressedButton == thirdButton {
self.thirdTextField.text = thirdButtonDataSource[row]
} else if lastPressedButton == fourthButton {
self.fourthTextField.text = fourthButtonDataSource[row]
} else if lastPressedButton == fifthButton {
self.fifthTextField.text = fithButtonDataSource[row]
}
}
}
注意:我在 Playground 上做了这个，所以它没有经过适当的测试，但它应该为你指明正确的方向(希望如此)
关于ios - 单击按钮，使选择器 View 出现，然后选项出现在标签中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48585874/