節目的UIDatePicker，當我在視圖

Question

挖掘我有UITapGestureRecognizer

我想說明的UIDatePicker，當我查看挖掘

我怎樣才能做到這一點風景嗎？

在此先感謝

Answer 1

剛剛宣佈的觸摸動作中你的選擇器的數據源。

// in viewDidload method 
let gesture = UITapGestureRecognizer(target: self, action: #selector (self.touchAction (_:))) 
self.view.addGestureRecognizer(gesture) // could be your custom view also 

// for Swift 3 
func touchAction(_ sender:UITapGestureRecognizer){ 
    // datasource 
    self.pickerData = ["data1","data2" .. ect] 

    if pickerData != nil{ 
     self.picker.delegate = self 
     self.picker.dataSource = self 
    } 
} 

注：您的控制器類應該爲了使用選擇器的代表確認UIPickerViewDelegate, UIPickerViewDataSource。

Answer 2

我不確定你想要什麼，但如果你只是有這樣的事情？

import UIKit 

class ViewController: UIViewController { 
    @IBOutlet weak var datePicker: UIDatePicker! 

    @IBAction func viewTapped(sender: Any) { // link gesture recogniser here 
     datePicker.isHidden = false 
    } 

    override func viewDidLoad() { 
     datePicker.isHidden = true // or set hidden checkbox to true in the picker's attributes inspector 
    } 
}