ios - 无法识别的选择器发送到实例日期选择器 - swift

Question

模拟器在从选取器中选择日期后崩溃。不知道为什么(菜鸟在这里)

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var dateLabel: UILabel!
@IBOutlet weak var datePicker: UIDatePicker!

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

    datePicker.addTarget(self, action: Selector("dataPickerChanged:"), forControlEvents: UIControlEvents.ValueChanged)
}

func datePickerChanged(datePicker:UIDatePicker){
    var dateFormatter = NSDateFormatter()

    dateFormatter.dateStyle = NSDateFormatterStyle.ShortStyle
    dateFormatter.timeStyle = NSDateFormatterStyle.ShortStyle

    var strDate = dateFormatter.stringFromDate(datePicker.date)
    dateLabel.text = strDate

}

Answer 1

您的方法称为“datePickerChanged”，但在您的 addTarget 调用中您将其称为“dataPickerChanged”。应该是:

datePicker.addTarget(self, action: Selector("datePickerChanged:"), forControlEvents: UIControlEvents.ValueChanged)