我发现了与此相关的类似问题，他们的回答很有帮助，但我对最后一件事感到困惑。我试图让 pickerView 在我点击一个字段时出现，然后在选择数据时，我希望 pickerView 隐藏。我能够从 pickerView 获取数据以隐藏，但是，pickerView 后面仍然有一个灰色矩形。如果我点击屏幕，而不是字段或 pickerView，灰色矩形会隐藏，然后在我点击下一个字段时重新出现，只有在选择新数据后才会保留，直到我点击某个空白屏幕。

我在下面包含了我的代码，您会看到我已经尝试了几种选择。这些并不是我尝试过的全部，但经过几次尝试后，我开始只是注释掉而不是删除，这样我就可以记住我做了什么。我对编码还很陌生，所以我很欣赏这个网站作为一种资源，并感谢您的帮助。

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITextFieldDelegate {

    @IBOutlet var enterSeason: UITextField!

    @IBOutlet var enterSport: UITextField!

    var dataPickerView = UIPickerView()    
    var season = ["2013", "2014", "2015"] //multi-season
    var sport = ["Baseball", "Football", "Basketball", "Hockey"]
    var activeDataArray = []

    override func viewDidLoad() {
        super.viewDidLoad()

        enterSeason.inputView = dataPickerView
        enterSport.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 == enterSeason {
            activeDataArray = season
        } else
            if textField == enterSport {
                activeDataArray = sport
            }
        dataPickerView.reloadAllComponents()
        dataPickerView.hidden = false
    }

    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return activeDataArray.count
    }

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

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if activeDataArray == season {
            enterSeason.text = season[row] as String
        }
        else if activeDataArray == sport {
            enterSport.text = sport[row] as String
        }
        //trying to hide the dataPicker
        dataPickerView.hidden = true
        //dataPickerView.reloadAllComponents()
        //self.dataPickerView.resignFirstResponder()
        //self.dataPickerView.frameForAlignmentRect(CGRectMake(0, 900, 375, 219))

    }

    //function to hide data in
    func textFieldShouldReturn(textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }

    //funtion to hide keyboard when screen is tapped
    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
        self.view.endEditing(true)
    }

}

最佳答案

如果你想隐藏 pickerView，试试这个:

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    if activeDataArray == season {
        enterSeason.text = season[row] as String
    }
    else if activeDataArray == sport {
        enterSport.text = sport[row] as String
    }
    //trying to hide the dataPicker
    self.view.endEditing(true)
    //dataPickerView.reloadAllComponents()
    //self.dataPickerView.resignFirstResponder()
    //self.dataPickerView.frameForAlignmentRect(CGRectMake(0, 900, 375, 219))

}

关于ios - Swift - 选择值后隐藏pickerView，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30495585/