ios - "unrecognized selector sent to instance error"当首先编辑地址字段然后返回日期时间选择器时

Question

我正在开发一个像这样的简单界面:

时间、时长、电话、地址都是UITextfield，当点击Time UITextField时，会出现UIDatePicker的inputview，可以选择日期和时间。

问题是，如果我编辑地址文本字段，然后返回将弹出 UIDatepicker 的时间文本字段，应用程序将因错误而崩溃:

    *** Terminating app due to uncaught 
exception         'NSInvalidArgumentException', 
reason: '-[WantFun.AddEventViewController dateTImeInputPressed:]
:   unrecognized selector sent to instance 0x137001f30'

如果我编辑显示为数字的持续时间或电话，则不会出错，但是每次我编辑地址时，如果尝试输入时间表单，我就会出错。

这是我的代码:

class AddEventViewController: UIViewController {

// MARK: Properties

@IBOutlet weak var datePicker: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()

    let dateFormatter = NSDateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm"
    let timeString = dateFormatter.stringFromDate(NSDate())

    datePicker.text = timeString

    // Do any additional setup after loading the view.
}

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

// MARK: Action

@IBAction func dateTimeInputPressed(sender: UITextField) {
    let inputView = UIView(frame: CGRectMake(0, 0, self.view.frame.width, 240))


    let datePickerView  : UIDatePicker = UIDatePicker(frame: CGRectMake(0, 40, 0, 0))
    datePickerView.datePickerMode = UIDatePickerMode.DateAndTime
    datePickerView.minuteInterval = 5

    inputView.addSubview(datePickerView) // add date picker to UIView

    let doneButton = UIButton(frame: CGRectMake((self.view.frame.size.width/2) - (100/2), 0, 100, 50))
    doneButton.setTitle("Done", forState: UIControlState.Normal)
    doneButton.setTitle("Done", forState: UIControlState.Highlighted)
    doneButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
    doneButton.setTitleColor(UIColor.grayColor(), forState: UIControlState.Highlighted)

    inputView.addSubview(doneButton) // add Button to UIView

    doneButton.addTarget(self, action: "doneButton:", forControlEvents: UIControlEvents.TouchUpInside) // set button click event

    sender.inputView = inputView
    datePickerView.addTarget(self, action: Selector("handleDatePicker:"), forControlEvents: UIControlEvents.ValueChanged)

    handleDatePicker(datePickerView) // Set the date on start.
}
func handleDatePicker(sender: UIDatePicker) {
    let dateFormatter = NSDateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm"
    datePicker.text = dateFormatter.stringFromDate(sender.date)
}

func doneButton(sender:UIButton?)
{
    datePicker.resignFirstResponder() // To resign the inputView on clicking done.
}

/*
// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    // Get the new view controller using segue.destinationViewController.
    // Pass the selected object to the new view controller.
}
*/

该错误的任何原因？谢谢。

Answer 1

您的代码/xib/ Storyboard中是否有错字？异常表示它找不到选择器 -[WantFun.AddEventViewController dateTImeInputPressed:](时间中的大写 I)并且您的类有方法 dateTimeInputPressed