Swift PresentViewController Dismisses Keyboard - ios

Question

I'm creating a Sign Up wizard with multiple UIViewControllers.
I currently have it setup so a user enter's his email, clicks the "Go" button on the keyboard and the next UIViewController slides in from the right where the user will enter his name. The problem though is that when I call presentViewController to bring the next UIViewController in, it dismisses the keyboard.
I'd like the keyboard to stay open the entire time while switching ViewControllers. If you look at Facebook's iOS app, they do what I'm trying to do with their signup page.
Any help or suggestions will be greatly appreciated. I read something about using an overlay window, but am not sure how to go about it since I will have multiple UIViewController's in my Sign Up wizard.
Here's my initial controller in the Sign Up Wizard:
class SignUpEmailViewController: UIViewController {
var titleLabel = UILabel.newAutoLayoutView()
var emailField = SignUpTextField(placeholder: "Enter your email address")
var emailLabel = UILabel.newAutoLayoutView()
var continueButton = SignUpContinueButton.newAutoLayoutView()
var footerView = SignUpFooterView.newAutoLayoutView()
let presentAnimationController = PushInFromLeftAnimationController()
let dismissAnimationController = PushInFromRightAnimationController()
override func viewDidLoad() {
super.viewDidLoad()
setupViews()
setupGestures()
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
emailField.becomeFirstResponder()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func setupViews() {
view.backgroundColor = UIColor.colorFromCode(0xe9eaed)
titleLabel.text = "Get Started"
titleLabel.font = UIFont(name: "AvenirNextLTPro-Demi", size: 18)
titleLabel.textColor = Application.greenColor
emailField.enablesReturnKeyAutomatically = true
emailField.returnKeyType = .Go
emailField.delegate = self
emailLabel.text = "You'll use this email when you log in and if you ever need to reset your password."
emailLabel.font = UIFont(name: "AvenirNextLTPro-Regular", size: 13)
emailLabel.textColor = .colorFromCode(0x4e5665)
emailLabel.numberOfLines = 0
emailLabel.textAlignment = .Center
continueButton.addTarget(self, action: "continueButtonPressed", forControlEvents: .TouchUpInside)
continueButton.hidden = true
view.addSubview(titleLabel)
view.addSubview(emailField)
view.addSubview(emailLabel)
view.addSubview(continueButton)
view.addSubview(footerView)
setupConstraints()
}
func setupGestures() {
let gestureRecognizer = UISwipeGestureRecognizer(target: self, action: "swipeHandler")
gestureRecognizer.direction = .Down
view.addGestureRecognizer(gestureRecognizer)
let tapGesture = UITapGestureRecognizer(target: self, action: "dismissKeyboard")
view.addGestureRecognizer(tapGesture)
}
func setupConstraints() {
titleLabel.autoAlignAxisToSuperviewAxis(.Vertical)
titleLabel.autoPinEdgeToSuperviewEdge(.Top, withInset: screenSize.height * 0.2)
emailField.autoAlignAxisToSuperviewAxis(.Vertical)
emailField.autoPinEdge(.Top, toEdge: .Bottom, ofView: titleLabel, withOffset: 15)
emailField.autoSetDimensionsToSize(CGSize(width: screenSize.width * 0.85, height: 40))
emailLabel.autoAlignAxisToSuperviewAxis(.Vertical)
emailLabel.autoPinEdge(.Top, toEdge: .Bottom, ofView: emailField, withOffset: 10)
emailLabel.autoSetDimension(.Width, toSize: screenSize.width * 0.85)
continueButton.autoAlignAxisToSuperviewAxis(.Vertical)
continueButton.autoPinEdge(.Top, toEdge: .Bottom, ofView: emailField, withOffset: 10)
continueButton.autoSetDimensionsToSize(CGSize(width: screenSize.width * 0.85, height: 30))
footerView.autoSetDimension(.Height, toSize: 44)
footerView.autoPinEdgeToSuperviewEdge(.Bottom)
footerView.autoPinEdgeToSuperviewEdge(.Leading)
footerView.autoPinEdgeToSuperviewEdge(.Trailing)
}
override func prefersStatusBarHidden() -> Bool {
return true
}
func swipeHandler() {
dismissViewControllerAnimated(true, completion: nil)
}
func continueButtonPressed() {
presentNextViewController()
}
func dismissKeyboard() {
view.endEditing(true)
}
func presentNextViewController() {
let toViewController = SignUpNameViewController()
toViewController.transitioningDelegate = self
toViewController.firstNameField.becomeFirstResponder()
presentViewController(toViewController, animated: true, completion: nil)
}
}
extension SignUpEmailViewController: UIViewControllerTransitioningDelegate {
func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return presentAnimationController
}
func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return dismissAnimationController
}
}
extension SignUpEmailViewController: UITextFieldDelegate {
func textFieldShouldReturn(textField: UITextField) -> Bool {
presentNextViewController()
return true
}
func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
continueButton.hidden = true
emailLabel.hidden = false
return true
}
func textFieldShouldEndEditing(textField: UITextField) -> Bool {
continueButton.hidden = false
emailLabel.hidden = true
return true
}
}
And here's the controller that I'm trying to present:
class SignUpNameViewController: UIViewController, UIViewControllerTransitioningDelegate {
var titleLabel = UILabel.newAutoLayoutView()
var textFieldContainer = UIView.newAutoLayoutView()
var firstNameField = SignUpTextField(placeholder: "First name")
var lastNameField = SignUpTextField(placeholder: "Last name")
var continueButton = SignUpContinueButton.newAutoLayoutView()
var footerView = SignUpFooterView.newAutoLayoutView()
let presentAnimationController = PushInFromLeftAnimationController()
let dismissAnimationController = PushInFromRightAnimationController()
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
firstNameField.becomeFirstResponder()
}
override func viewDidLoad() {
super.viewDidLoad()
setupViews()
setupGestures()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func setupViews() {
view.backgroundColor = UIColor.colorFromCode(0xe9eaed)
titleLabel.text = "What's your name?"
titleLabel.font = UIFont(name: "AvenirNextLTPro-Demi", size: 18)
titleLabel.textColor = Application.greenColor
firstNameField.returnKeyType = .Next
firstNameField.enablesReturnKeyAutomatically = true
lastNameField.returnKeyType = .Next
lastNameField.enablesReturnKeyAutomatically = true
continueButton.addTarget(self, action: "continueButtonPressed", forControlEvents: .TouchUpInside)
view.addSubview(titleLabel)
view.addSubview(textFieldContainer)
textFieldContainer.addSubview(firstNameField)
textFieldContainer.addSubview(lastNameField)
view.addSubview(continueButton)
view.addSubview(footerView)
setupConstraints()
}
func setupGestures() {
let gestureRecognizer = UISwipeGestureRecognizer(target: self, action: "swipeHandler")
gestureRecognizer.direction = .Right
view.addGestureRecognizer(gestureRecognizer)
let tapGesture = UITapGestureRecognizer(target: self, action: "dismissKeyboard")
view.addGestureRecognizer(tapGesture)
}
func setupConstraints() {
titleLabel.autoAlignAxisToSuperviewAxis(.Vertical)
titleLabel.autoPinEdgeToSuperviewEdge(.Top, withInset: screenSize.height * 0.2)
textFieldContainer.autoPinEdge(.Top, toEdge: .Bottom, ofView: titleLabel, withOffset: 15)
textFieldContainer.autoAlignAxisToSuperviewAxis(.Vertical)
textFieldContainer.autoSetDimensionsToSize(CGSize(width: screenSize.width * 0.8, height: 40))
let spaceBetweenTextFields: CGFloat = 5
let textFieldSize = ((screenSize.width * 0.8) - spaceBetweenTextFields) / 2
let textFields: NSArray = [firstNameField, lastNameField]
textFields.autoDistributeViewsAlongAxis(.Horizontal, alignedTo: .Horizontal, withFixedSize: textFieldSize, insetSpacing: false)
firstNameField.autoPinEdgeToSuperviewEdge(.Top)
firstNameField.autoPinEdgeToSuperviewEdge(.Bottom)
lastNameField.autoPinEdgeToSuperviewEdge(.Top)
lastNameField.autoPinEdgeToSuperviewEdge(.Bottom)
continueButton.autoAlignAxisToSuperviewAxis(.Vertical)
continueButton.autoPinEdge(.Top, toEdge: .Bottom, ofView: textFieldContainer, withOffset: 10)
continueButton.autoSetDimensionsToSize(CGSize(width: screenSize.width * 0.8, height: 30))
footerView.autoSetDimension(.Height, toSize: 44)
footerView.autoPinEdgeToSuperviewEdge(.Bottom)
footerView.autoPinEdgeToSuperviewEdge(.Leading)
footerView.autoPinEdgeToSuperviewEdge(.Trailing)
}
override func prefersStatusBarHidden() -> Bool {
return true
}
func dismissKeyboard() {
view.endEditing(true)
}
func swipeHandler() {
dismissViewControllerAnimated(true, completion: nil)
}
func continueButtonPressed() {
let toViewController = SignUpPasswordViewController()
toViewController.transitioningDelegate = self
presentViewController(toViewController, animated: true, completion: {})
}
func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return presentAnimationController
}
func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return dismissAnimationController
}
}
And here is my custom transition:
class PushInFromLeftAnimationController: NSObject, UIViewControllerAnimatedTransitioning {
func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
return 0.35
}
func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
let fromViewController = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)!
let toViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)!
let finalFrameForVC = transitionContext.finalFrameForViewController(toViewController)
let containerView = transitionContext.containerView()
let bounds = UIScreen.mainScreen().bounds
toViewController.view.frame = CGRectOffset(finalFrameForVC, bounds.size.width, 0)
containerView!.addSubview(toViewController.view)
UIView.animateWithDuration(transitionDuration(transitionContext), delay: 0.0, options: UIViewAnimationOptions.CurveLinear, animations: {
fromViewController.view.frame = CGRectOffset(finalFrameForVC, -bounds.size.width, 0)
toViewController.view.frame = finalFrameForVC
}, completion: {
finished in
transitionContext.completeTransition(true)
})
}
}

Answer 1

I think the keyboard is dismissed because the corresponding UIResponder will resign at the same time the ViewController will disappear.
Have you tried setting the next UITextField (in the next ViewController) as the first responder then? thus the keyboard will be linked to a new UIResponder before the previous one would end editing...