将从UIPicker中选择的值分配给Swift中的UITextField(也包括如何显示和隐藏它)

The title says it all. I am trying to assign a value (gender) that the user will select from a UIPicker and then the value will appear as the UITextField input using Swift.

标题说明了一切。我正在尝试分配一个值(性别)，用户将从一个UIPicker中选择，然后这个值将作为UITextField输入使用Swift来显示。

Here is my code:

这是我的代码:

class RegistrationViewController: UIViewController, UIPickerViewDelegate, UITextFieldDelegate {

@IBOutlet var getGender: UIPickerView! = UIPickerView()

@IBOutlet var genderTextField: UITextField! = nil

let gender = ["Male", "Female", "Other"]

override func viewDidLoad() {
    super.viewDidLoad()

    self.genderTextField.inputView = pickerView

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

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

// returns the number of 'columns' to display.
func numberOfComponentsInPickerView(pickerView: UIPickerView!) -> Int{
    return 1
}

// returns the # of rows in each component..
func pickerView(pickerView: UIPickerView!, numberOfRowsInComponent component: Int) -> Int{
    return gender.count
}

func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int) -> String! {
    return gender[row]
}

func pickerView(pickerView: UIPickerView!, didSelectRow row: Int, inComponent component: Int)
{
    genderTextField.text = "\(gender[row])"

}

I am aware that this could be achieved if instead of a textfield I use a label and format it to look as a textfield. Then changing the value of the label.

我知道，如果我使用标签而不是textfield，并将其格式化为textfield，这是可以实现的。然后改变标签的值。

I would also like to know how to show/hide the UIPicker when the label/textfield is clicked. Could anyone help me out with that?

我还想知道如何在标签/textfield被单击时显示/隐藏UIPicker。谁能帮我一下吗?

Thank you so much for your advice!

非常感谢您的建议!

Cheers.

欢呼。

Update:

更新:

I have done everything but the only thing that the compiler complains about is the line with the comment //ERROR. As I mentioned, it does not accept only this:

我已经做了所有的事情，但是编译器唯一要抱怨的是带有注释//错误的行。正如我所提到的，它不仅接受这一点:

self.genderTextField.inputView = pickerView   //ERROR -> Requires more declarations! Read update section below!

It asks me to provide extra declarations such as:

它要求我提供额外的声明，例如:

pickerView!(pickerView: UIPickerView?, didSelectRow: Int, inComponent: Int) 

pickerView!(pickerView: UIPickerView?, numberOfRowsInComponent: Int)

There are a couple other suggestions from Xcode but I do not know which one to use and how.

Xcode中还有其他一些建议，但我不知道该使用哪一个以及如何使用。

Help please!

请帮助!

Thanks!

谢谢!

2 个解决方案

#1

func pickerView(pickerView: UIPickerView!, didSelectRow row: Int, inComponent component: Int)
{
    textField.text = "\(gender[row])"
}

And to show/hide the picker (in viewDidLoad)

并显示/隐藏picker(在viewDidLoad中)

self.textField.inputView = pickerView

#2

-1

Try this: self.txtSelectareRate.inputView = UIPickerView()

试试这个:self.txtSelectareRate。视图=另UIPickerView()

#1

func pickerView(pickerView: UIPickerView!, didSelectRow row: Int, inComponent component: Int)
{
    textField.text = "\(gender[row])"
}