Quelle est la vitesse d'animation du clavier apparaissant dans iOS8?

La réponse avec la variable de durée de droite et de travailler iOS 3 à 8, mais avec la nouvelle version de Swift, la réponse du code ne fonctionne plus.
Peut-être que c'est une erreur de mon côté, mais je dois écrire:

let duration = aNotification.userInfo![UIKeyboardAnimationDurationUserInfoKey] as Double
let curve = aNotification.userInfo![UIKeyboardAnimationCurveUserInfoKey] as UInt

self.view.setNeedsLayout()
//baseConstraint.constant = 211
self.view.setNeedsUpdateConstraints()

UIView.animateWithDuration(duration, delay: 0.0, options: UIViewAnimationOptions(curve), animations: { _ in
    //self.view.layoutIfNeeded()
}, completion: { aaa in
    //(value: Bool) in println()
})

Ressemble objectForKey ne fonctionne plus et la conversion est plus stricte.

Swift 4 mise à jour, iOS 11+

Inscrire pour la notification d'abord en vue du cycle de vie de la méthode :

override func viewDidLoad() {
    super.viewDidLoad()
    NotificationCenter.default.addObserver(self, selector: #selector(keyBoardWillShow(notification:)), name: .UIKeyboardWillShow, object: nil)
}

Puis dans keyBoardWillShow méthode :

@objc func keyBoardWillShow(notification: NSNotification) {
    guard let duration = notification.userInfo?[UIKeyboardAnimationDurationUserInfoKey] as? Double else {return}
    print(duration) //you got animation's duration safely unwraped as a double
}

Enfin, n'oubliez pas de retirer le statut d'observateur dans deinit méthode :

deinit {
    NotificationCenter.default.removeObserver(self)
}

Tout d'abord, la réponse sélectionnée est la bonne façon de faire.

Plus peuvent être fournis ici est ce que l'animation est vraiment. Si vous imprimez tous CAAnimations dans le UIViewAnimation bloc, vous trouverez que c'est un CASpringAnimation lors de la configuration de la courbe d'animation à celui qui est prévu dans le clavier de notification. La durée est de 0,5, et les autres paramètres sont:

let ani = CASpringAnimation(keyPath: someKey)
ani.damping = 500
ani.stiffness = 1000
ani.mass = 3
ani.duration = 0.5

Le code ci-dessus peut reproduire l'animation précisément.

Une fois l'animation de la courbe est définie sur le clavier, UIView animation ignore la durée dans le paramètre. (Si vous voulez vraiment changer la durée, ajuster la mass valeur.)

//--------------------------------------------------------------
//MARK: -
//MARK: - UITextFieldDelegate
//--------------------------------------------------------------
//To trigger event when user types in fields
//right click in IB and choose EditingChanged >> textField_EditingChanged
//NOTE IF KEYBOARD NOT SHOWING IN SIMULATOR and no view appearing ITS TURNED OFF BY DEFAULT SO YOU CAN TYPE WITH YOUR MAC KEYBOARD - HIT CMD+K or Simulator > Menu > Toggle Software Keyboard...
@IBAction func textField_EditingChanged(textField: UITextField) {
//if more than one search
if(textField == self.textFieldAddSearch){
appDelegate.log.error("self.textFieldAddSearch: '\(self.textFieldAddSearch.text)'")
if textField.text == ""{
}else{
callJSONWebservices(textField.text)
}
}else{
appDelegate.log.error("textFieldDidBeginEditing: unhandled textfield")
}
}
//TWO WAYS TO HIDE THE VIEW
//textFieldShouldReturn
//buttonCancel_Action
//USER HIT RETURN BUTTON ON keyboard >> resignFirstResponder >> triggers  keyboardWillHide
func textFieldShouldReturn(textField: UITextField)-> Bool{
//triggers keyboardWillHide: which also fades out view
self.textFieldAddSearch.resignFirstResponder()
return false
}
//--------------------------------------------------------------
//MARK: -
//MARK: - KEYBORAD
//--------------------------------------------------------------
private func subscribeToKeyboardNotifications() {
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}
private func unsubscribeFromKeyboardNotifications() {
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}
func keyboardWillShow(notification: NSNotification) {
if let userInfo = notification.userInfo {
if let heightKeyboard = userInfo[UIKeyboardFrameEndUserInfoKey]?.CGRectValue().height {
if let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey]?.doubleValue {
self.viewAddNewSearchResults.alpha = 0.0
self.viewAddNewSearchResults.hidden = false
if let curve = userInfo[UIKeyboardAnimationDurationUserInfoKey]?.integerValue {
appDelegate.log.info("keyboardWillShow: duration:\(duration)")
UIView.animateWithDuration(duration, delay:0.0, options: .CurveEaseInOut,
animations: {
//self.view.frame = CGRectMake(0, 0, Geo.width(), Geo.height() - height)
self.viewAddNewSearchResults_BottomConstraint.constant = heightKeyboard;
self.viewAddNewSearchResults.alpha = 1.0
},
completion: nil)
}
}
}
}
}
func keyboardWillHide(notification: NSNotification) {
if let userInfo = notification.userInfo {
if let heightKeyboard = userInfo[UIKeyboardFrameEndUserInfoKey]?.CGRectValue().height {
if let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey]?.doubleValue {
if let curve = userInfo[UIKeyboardAnimationDurationUserInfoKey]?.integerValue {
appDelegate.log.info("keyboardWillHide: duration:\(duration)")
UIView.animateWithDuration(duration, delay:0.0, options: .CurveEaseInOut,
animations: {
self.viewAddNewSearchResults_BottomConstraint.constant = 0;
self.viewAddNewSearchResults.alpha = 0.0
},
completion: nil)
}
}
}
}
}
//Add button shows search result panel below search text fields
//just set focus in the textField
//then the keyboardWillShow will fade in the view and resize it to fit above the keyboard
//and match fade in duration to animation of keyboard moving up
@IBAction func buttonAdd_Action(sender: AnyObject) {
//triggers keyboardWillHide: which also fades out view
self.textFieldAddSearch.resignFirstResponder()
}
//TWO WAYS TO HIDE THE VIEW
//textFieldShouldReturn
//buttonCancel_Action
//Cancel on the search results - just resignFirstResponder >> triggers keyboardWillHide: which also fades out view
@IBAction func buttonCancel_Action(sender: AnyObject) {
//triggers keyboardWillHide: which also fades out view
self.textFieldAddSearch.resignFirstResponder()
}