ios - 带有 DatePicker 的 UITextField 崩溃

Question

我是 iOS/Swift 的新手，所以请多多包涵。

我有一个 TextField、timeTextField，并希望在单击时显示一个 TimePicker。 All this is working property but when another element is selected the app crashes why does it crash?更新 1:更新代码代码:

func setupTimePicker(){
    datePickerView.datePickerMode = UIDatePickerMode.time
    datePickerView.removeFromSuperview()
    timeTextField.inputView = datePickerView
    datePickerView.addTarget(self, action: #selector(self.datePickerValueChanged(sender:)), for: .valueChanged)
}

func datePickerValueChanged(sender:UIDatePicker) {
    var date = Date()
    let calendar = Calendar.current

    date = sender.date;

    let hour = calendar.component(.hour, from: date)
    let minutes = calendar.component(.minute, from: date)

    timeTextField.text = String(format: "%02d", hour) + ":" + String(format: "%02d", minutes)
}

错误:

[TestApp.ViewController pickTime:]: unrecognized selector sent to instance 0x7f9305e08e20

Answer 1

自 iOS8/iOS9 , 当您将 View 添加为 inputView至 UITextField应用程序崩溃。要解决崩溃问题，请在添加 datePicker 之前作为inputView至 UITextField调用[<pickerView> removeFromSuperView] .这将解决崩溃问题。