ios - UITEXTFIELD InputView Uipicker无法快速运行

您好，当用户单击textfield时，我正试图以编程方式弹出一个UIPickerView视图。我试过了，但没用。它不起作用。当我单击文本字段时什么都没有发生

class UserProfileTableViewController: UITableViewController,UITextFieldDelegate,UIPickerViewDelegate,UIPickerViewDataSource {
 var itemPicker: UIPickerView! = UIPickerView()

    @IBOutlet weak var genderTxtField: UITextField!


    var gender = ["MALE","FEMALE"]
    override func viewDidLoad() {
        super.viewDidLoad()


        genderTxtField.delegate = self

      itemPicker!.delegate = self
        itemPicker!.dataSource = self
        itemPicker!.backgroundColor = UIColor.blackColor()

         self.genderTxtField.inputView = itemPicker





    }




    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)
    {
        genderTxtField.text = gender[row]
        //.hidden = true;
    }

    func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
        itemPicker.hidden = false
        return false
    }

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


}

最佳答案

当前代码中的问题在于此方法：

func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
    itemPicker.hidden = false
    return false // <--- this is not letting the textField become editable
}

我建议完全取消这种方法。

关于ios - UITEXTFIELD InputView Uipicker无法快速运行，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/35057684/