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我得到這個消息的消息：[保留的UITextField]：發送到釋放實例
[UITextField retain]: message sent to deallocated instance.
我瞭解的消息，但我不知道什麼是「消息」被髮送以及如何阻止它發生...... 。
此代碼產生錯誤：
func dismissController() {
self.view.endEditing(true)
self.dismissViewControllerAnimated(false, completion: nil)
}
雖然下面的作品「精」我不知道爲什麼我有駁回控制器之前延遲：
func dismissController() {
self.view.endEditing(true)
let delay = 0.75 * Double(NSEC_PER_SEC)
let time = dispatch_time(DISPATCH_TIME_NOW, Int64(delay))
dispatch_after(time, dispatch_get_main_queue()) {() -> Void in
self.dismissViewControllerAnimated(false, completion: nil)
}
}
編輯：（幾乎全碼）：
@IBOutlet weak var locationTextView: UITextField!
@IBOutlet weak var userIDTextView: UITextField!
var treeLocationArray = NSMutableArray()
var treeUserIDArray = NSMutableArray()
讓pickerView = UIPickerView（） VAR pickerButton =的UIButton（） VAR keyboardButton =的UIButton（） VAR locationIsSelected =真
override func viewDidLoad() {
super.viewDidLoad()
//....
locationTextView.delegate = self
userIDTextView.delegate = self
//Get the Plist... etc
treeLocationArray = dict?.objectForKey("Location") as! NSMutableArray
treeUserIDArray = dict?.objectForKey("UserID") as! NSMutableArray
locationTextView.text = userPrefs.objectForKey("DefaultLocation") as? String
userIDTextView.text = userPrefs.objectForKey("DefaultName") as? String
locationTextView.text = userPrefs.objectForKey("DefaultLocation") as? String
/// Create a view for the Accessory View
let customView = UIView(frame: CGRectMake(0, 0, 10, 50))
customView.backgroundColor = UIColor.lightGrayColor()
/// Setup the picker button
pickerButton = UIButton(frame: CGRectMake(60 , 8, 32, 32))
pickerButton.setImage(UIImage(named:"dropIcon"), forState: .Normal)
pickerButton.tintColor = UIColor.blueColor()
pickerButton.addTarget(self, action: #selector(UserDefaultsViewController.pickerTapped), forControlEvents: UIControlEvents.TouchUpInside)
customView.addSubview(pickerButton)
/// Setup the keyboard button
keyboardButton = UIButton(frame: CGRectMake(10 , 8, 32, 32))
keyboardButton.setImage(UIImage(named:"keyboardIcon"), forState: .Normal)
keyboardButton.tintColor = UIColor.blueColor()
keyboardButton.addTarget(self, action: #selector(UserDefaultsViewController.keyboardTapped), forControlEvents: UIControlEvents.TouchUpInside)
customView.addSubview(keyboardButton)
locationTextView.inputAccessoryView = customView
userIDTextView.inputAccessoryView = customView
}
func textFieldDidBeginEditing(textField: UITextField) {
if textField == locationTextView {
locationIsSelected = true
}
if textField == userIDTextView {
locationIsSelected = false
}
self.pickerView.reloadAllComponents()
}
func keyboardTapped(){
if locationIsSelected {
locationTextView.resignFirstResponder()
locationTextView.inputView = nil
locationTextView.becomeFirstResponder()
}
else {
userIDTextView.resignFirstResponder()
userIDTextView.inputView = nil
userIDTextView.becomeFirstResponder()
}
}
func pickerTapped(){
if locationIsSelected {
locationTextView.resignFirstResponder()
locationTextView.inputView = nil
locationTextView.inputView = pickerView
locationTextView.becomeFirstResponder()
}
else {
userIDTextView.resignFirstResponder()
userIDTextView.inputView = nil
userIDTextView.inputView = pickerView
userIDTextView.becomeFirstResponder()
}
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
var numberOfComponents = Int()
if locationIsSelected {
numberOfComponents = treeLocationArray.count
}
else {
numberOfComponents = treeUserIDArray.count
}
return numberOfComponents
}
func pickerView(pickerView: UIPickerView, numberOfRowsInSection section: Int) -> Int {
var numberOfComponents = Int()
if locationIsSelected {
numberOfComponents = treeLocationArray.count
}
else {
numberOfComponents = treeUserIDArray.count
}
return numberOfComponents
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
var componetString = String()
if locationIsSelected {
componetString = (treeLocationArray[row] as? String)!
}
else {
componetString = (treeUserIDArray[row] as? String)!
}
return componetString
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if locationIsSelected {
if treeLocationArray.count >= 1 {
locationTextView.text = treeLocationArray[row] as? String
}
}
else {
if treeUserIDArray.count >= 1 {
userIDTextView.text = treeUserIDArray[row] as? String
}
}
}
您是否在其他地方使用延遲，以後訪問該文本字段變量？ – Shubhank
沒有其他地方......我只是因爲崩潰而在這裏添加了延遲 –
你能創建一個樣本程序來重現這個嗎？並在github上查看 – Shubhank