ios - 点击文本字段时未调用 textFieldDidBeginEditing 函数

Question

我有一个包含三个 View 的项目，它们都是多个文本字段，在点击时调用 UIPickerView。我有两个 View 工作得很好，但是当我开始第三个 View 时，我无法调用 textFieldDidBeginEditing 函数。我通过在函数的第一行放置一个断点来确认这一点。当我运行时，断点永远不会命中，即使我点击 View 中的任何字段也是如此。我复制并粘贴了其他 View 中的代码，更改了变量名称。

每个文本字段都在 viewDidLoad 方法中初始化为我在之前代码中定义的 dataPickerView 变量。 dataPickerView.delegate = self 和 dataPickerView.dataSource = self 也是。

这是我认为是相关的代码。我确定我缺少一些简单的东西

@IBOutlet var enterDispPhys: UITextField!
@IBOutlet var enterUser: UITextField!
@IBOutlet var enterInsurance: UITextField!
@IBOutlet var enterBodyPart: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()

    self.userLabel.text = userName
    self.teamLabel.text = teamName

    //initialize the inputView of the dispensing physician field to the PickerView
    enterDispPhys.inputView = dataPickerView

    //initialize the inputView of the user name field to the PickerView
    enterUser.inputView = dataPickerView

    //initialize the inputView of the insurance field to the PickerView
    enterInsurance.inputView = dataPickerView

    //initialize the inputView of the body part field to the PickerView
    enterBodyPart.inputView = dataPickerView

    dataPickerView.delegate = self
    dataPickerView.dataSource = self
}

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

func textFieldDidBeginEditing(textField: UITextField) {
    activeDataArray == [] //clear out the clicked field data array
    if textField == enterDispPhys {
        activeDataArray = dispPhys
    } else
        if textField == enterUser {
            activeDataArray = userNameList
    } else
        if textField == enterInsurance {
            activeDataArray = insCode
    } else
        if textField == enterBodyPart {
            activeDataArray = bodyPart
    }
    dataPickerView.reloadAllComponents()
    dataPickerView.hidden = false
    println(activeDataArray)
}

Answer 1

您是否设置类声明来实现文本字段委托(delegate)？您是否还为每个字段设置了委托(delegate)？我喜欢使用观察者作为电子邮件字段 bellor，但您也可以将其添加到 viewDidLoad 中，就像在密码字段中一样。

class ViewController: UIViewController, UITextFieldDelegate {
    @IBOutlet weak var email: UITextField!{
        didSet{email.delegate = self}
    }
    @IBOutlet weak var password: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
        password.delegate = self
    }
}