问题
I have found similar questions about this and their answers were helpful but I am stuck at one last thing. I am trying to get a pickerView to appear when I tap on a field, then when data is selected, I want the pickerView to hide. I am able to get the data from the pickerView to hide, however, there is still a grey rectangle that was behind the pickerView that remains. If I tap on the screen, not on a field or the pickerView, the gray rectangle hides, then reappears when I tap on the next field, only to remain after the new data is chosen, until I tap on some blank screen.
I am including my code below and you will see that I have tried several options. These are not all I have tried but after several attempts, I began to just comment out instead of delete so I could remember what I had done. I am very new to coding so I appreciate this site as a resource and thank you for your assistance.
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)
}
}
回答1:
If you want to hide the pickerView, try this:
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))
}
回答2:
One way to hide picker view is:
self.view.endEditing(true)
This worked for me.
回答3:
i tried resigning the first responder of the text field in didSelectRow
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if activeDataArray == season {
enterSeason.text = season[row] as String
enterSeason.resignFirstResponder()
}
else if activeDataArray == sport {
enterSport.text = sport[row] as String
enterSport.resignFirstResponder()
}
}
来源：https://stackoverflow.com/questions/30495585/swift-hide-pickerview-after-value-selected