如何使一个下拉菜单中的斯威夫特3

Question

如何使用SWIFT 3来实现iOS中的下拉菜单图如下图所示：

我寻觅SO问题，但他们更喜欢利用UIPicker的但我希望实现这一目标。是否可以通过使用表视图来实现这种类型？

这给我需要从下拉菜单中选择日期：

如何显示在表视图的日期，如下图所示？

Answer 1

有一堆Demo和DropDown示例，当用户单击按钮时，可以通过使用tableView只是tableview来实现此目的。 或者您可以使用此 https://cocoapods.org/pods/DropDown

let dropDown = DropDown() 

// The view to which the drop down will appear on 
dropDown.anchorView = view // UIView or UIBarButtonItem 

// The list of items to display. Can be changed dynamically 
dropDown.dataSource = ["Car", "Motorcycle", "Truck"] 

Optional properties: 

// Action triggered on selection 
dropDown.selectionAction = { [unowned self] (index: Int, item: String) in 
    print("Selected item: \(item) at index: \(index)") 
} 

// Will set a custom width instead of the anchor view width 
dropDownLeft.width = 200 
Display actions: 

dropDown.show() 
dropDown.hide() 

Answer 2

（SWIFT 3）添加文本框和uipickerview故事板再加入委托和数据源uipickerview并添加委托给文本框。按照视频寻求帮助 https://youtu.be/SfjZwgxlwcc

import UIKit 

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITextFieldDelegate { 


@IBOutlet weak var textBox: UITextField! 
@IBOutlet weak var dropDown: UIPickerView! 


var list = ["1", "2", "3"] 

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

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


public func numberOfComponents(in pickerView: UIPickerView) -> Int{ 
    return 1 

} 

public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int{ 

    return list.count 

} 

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 

    self.view.endEditing(true) 
    return list[row] 

} 

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 

    self.textBox.text = self.list[row] 
    self.dropDown.isHidden = true 

} 

func textFieldDidBeginEditing(_ textField: UITextField) { 

    if textField == self.textBox { 
     self.dropDown.isHidden = false 
     //if you dont want the users to se the keyboard type: 

     textField.endEditing(true) 
    } 

} 
}