ios - 在 Swift 中使用复选框

Question

我试图弄清楚如何仅获取已选中的复选框的值。我将有大约十个带有提交 UIButton 的复选框。当按下“提交”按钮时，我将仅保存所选复选标记的所有值。我现在拥有的代码不会打印“拳击和空手道”，它只会在选择拳击时打印“拳击”。 screenshot

class SignUpSecondViewController: UIViewController, BEMCheckBoxDelegate {


@IBOutlet weak var wrestling: BEMCheckBox!
@IBOutlet weak var karate: BEMCheckBox!
@IBOutlet weak var boxing: BEMCheckBox!

override func viewWillAppear(_ animated: Bool) {
    navigationController?.setNavigationBarHidden(false, animated: true)
}
override func viewDidLoad() {
    super.viewDidLoad()

    boxing.delegate = self
    karate.delegate = self
    wrestling.delegate = self

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

  func didTap(_ checkBox: BEMCheckBox) {

    if (checkBox.tag == 1 && checkBox.on){
        print("BOXING")
    }else if (checkBox.tag == 1 && checkBox.on) && (checkBox.tag == 2 && checkBox.on){
        print("Boxing and karate")

    }

}

Answer 1

每次您只是检查 checkBox 时，都会同时比较 checkBox 标记 1 和 2。它总是给你虚假的。根据需求，创建一个Array类型的全局变量 options ，使用这几行代码:

    var options = [String]()
func didTap(_ checkBox: BEMCheckBox) {
    switch checkBox {
    case wrestling:
      addRemoveOption(forState: checkBox.on, option: "WRESTLING")
    case karate :
        addRemoveOption(forState: checkBox.on, option: "KARATE")
    default:
        addRemoveOption(forState: checkBox.on, option: "BOXING")
    }

}
func addRemoveOption(forState : Bool , option : String)
{
    switch forState
    {
    case true:
        options += [option]
    case false:
        if let index = options.index(of: option)
        {
            options.remove(at: index)
        }

    }
}
@IBAction func actionSubmit(_ sender : Any)
{
    print(options.joined(separator: "&"))
}

希望这对你有帮助