ios - Swift:按钮如何执行序列

Question

按钮如何在每次按下时取消隐藏文本字段，然后在按下 4 次后按钮变为非事件状态？到目前为止，这是我的代码。预先感谢!

import UIKit

class AddNewGameViewController: UIViewController {

    @IBOutlet weak var Player1: UITextField!
    @IBOutlet weak var Player2: UITextField!
    @IBOutlet weak var Player3: UITextField!
    @IBOutlet weak var Player4: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.


        Player1.hidden = true
        Player2.hidden = true
        Player3.hidden = true
        Player4.hidden = true



    }

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

    @IBAction func addPlayer(sender: UIButton) {
        sender.enabled = false

        Player1.hidden = false
        Player2.hidden = false
        Player3.hidden = false
        Player4.hidden = false


    }

Answer 1

将您的@IBOutlet更改为@IBOutlet Collection，如下所示:

@IBOutlet var players: [UITextField]!

然后将每个文本字段连接到它Player1->Player2-> Player3->Player4

最后在 btn 操作中:

for textField in players {

    if textField.hidden {
        textField.hidden = false
        if textField == players.last {
            sender.enabled = false
        }
        break
    }

}

更新

您可以使用 viewDidload 中的 players.forEach {$0.hidden = true} 隐藏所有它们 或将它们隐藏在 xib/storyboard 中。

连接图像: