我为UIDatePicker编写了这段代码到UITextField中:@IBOutletweakvardateTextField:UITextField!@IBActionfunctextFieldEditing(sender:UITextField){letdatePickerView:UIDatePicker=UIDatePicker()datePickerView.datePickerMode=UIDatePickerMode.Datesender.inputView=datePickerViewdatePickerView.addTarget(self,action:ViewC

我看了很多教程甚至苹果官方文档，一定不明白这段代码有什么问题。vardueDatePicker=UIDatePicker()@IBOutletweakvartextField:UITextField!overridefuncviewDidLoad(){super.viewDidLoad()textField.inputView=dueDatePickerdueDatePicker.addTarget(self,action:#selector(datePickerValueChanged(_:)),for:UIControlEvents.valueChanged)}funcdatePi

我看了很多教程甚至苹果官方文档，一定不明白这段代码有什么问题。vardueDatePicker=UIDatePicker()@IBOutletweakvartextField:UITextField!overridefuncviewDidLoad(){super.viewDidLoad()textField.inputView=dueDatePickerdueDatePicker.addTarget(self,action:#selector(datePickerValueChanged(_:)),for:UIControlEvents.valueChanged)}funcdatePi