如何通过日期选择器(或只是日期)在Swift中的文本字段上显示日期? [英] How to pass the date picker (or just the date) to show the date on textfield in Swift?
本文介绍了如何通过日期选择器(或只是日期)在Swift中的文本字段上显示日期?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在键盘上显示日期选择器视图。我正在使用UITextField扩展名进行此操作。
I want show a date picker view on keyboard. I am doing this using UITextField extension.
我的代码:
extension UITextField {
//... other functions
func showDatePicker(){
let datePicker = UIDatePicker()
datePicker.datePickerMode = .date
let toolbar = UIToolbar();
toolbar.sizeToFit()
let doneButton = UIBarButtonItem(title: "Pronto", style: UIBarButtonItemStyle.plain, target: self, action: #selector(UITextField.doneDatePicker(_:)))
let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
let cancelButton = UIBarButtonItem(title: "Cancelar", style: UIBarButtonItemStyle.plain, target: self, action: #selector(UITextField.donePicker))
toolbar.setItems([cancelButton,spaceButton,doneButton], animated: false)
self.inputAccessoryView = toolbar
self.inputView = datePicker
}
@objc func doneDatePicker(_ datePicker: UIDatePicker){
let formatter = DateFormatter()
formatter.dateFormat = "dd/MM/yyyy"
self.text = formatter.string(from: datePicker.date)
self.endEditing(true)
}
}
我的问题是当我点击 Pronto按钮时n并执行函数doneDatePicker。我需要传递UIDatePicker(或只是日期)以在文本字段上显示日期,但出现此错误:
My problem is when I tap "Pronto" button and the function doneDatePicker is executed. I need pass the UIDatePicker (or just the date) to show the date on textfield but I get this error:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIBarButtonItem date]: unrecognized selector sent to instance 0x103488850'
我该如何解决?
推荐答案
您应该简单地将UITextField子类化,并将datepicker声明为UITextField的属性,并覆盖didMoveToSuperview方法并在那里进行自定义:
You should simply subclass UITextField and declare your datepicker as a property of your UITextField, override didMoveToSuperview method and do the customisation there:
class DateField: UITextField {
var date: Date?
let datePicker = UIDatePicker()
let formatter = DateFormatter()
override func didMoveToSuperview() {
datePicker.datePickerMode = .date
formatter.dateStyle = .short
let toolbar = UIToolbar()
toolbar.sizeToFit()
let done = UIBarButtonItem(title: "Pronto", style: .plain, target: self, action: #selector(doneAction))
let space = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let cancel = UIBarButtonItem(title: "Cancelar", style: .plain, target: self, action: #selector(cancelAction))
toolbar.setItems([cancel,space,done], animated: false)
inputAccessoryView = toolbar
inputView = datePicker
}
@objc func cancelAction(_ sender: UIBarButtonItem) {
endEditing(true)
}
@objc func doneAction(_ sender: UIBarButtonItem) {
date = datePicker.date
text = formatter.string(from: datePicker.date)
endEditing(true)
}
}
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