I'm using the SlackTextViewController.
Before It works fine but now I got a problem.
When I tapped inputView of SlackTextViewController then Keyboard will be displayed.
But InputView is not following up keyboard. So I cant see InputView after keyboard showing up.
Here is snippet code.
class CommentVC: SLKTextViewController {
override var tableView: UITableView {
get {
return super.tableView!
}
}
override class func tableViewStyle(for decoder: NSCoder) -> UITableViewStyle {
return .plain
}
override func viewDidLoad() {
super.viewDidLoad()
//Do any additional setup after loading the view, typically from a nib.
let cellNib = UINib(nibName: "CommentTableCell", bundle: Bundle.main)
tableView.register(cellNib, forCellReuseIdentifier: "CommentTableCell")
//Set Title at the top
self.navigationController?.isNavigationBarHidden = false
self.navigationItem.title = "Comments"
self.navigationItem.hidesBackButton = true
let backButton = UIBarButtonItem(image: UIImage(named: "backBtn"), style: UIBarButtonItemStyle.plain, target: self, action: #selector(CommentVC.back(_:)))
self.navigationItem.leftBarButtonItem = backButton
self.navigationItem.leftBarButtonItem?.setBackgroundVerticalPositionAdjustment(-8, for: UIBarMetrics.default)
// SLKTVC's configuration
self.bounces = true
self.shakeToClearEnabled = true
self.isKeyboardPanningEnabled = true
self.shouldScrollToBottomAfterKeyboardShows = false
self.isInverted = false
}
override func didChangeKeyboardStatus(_ status: SLKKeyboardStatus) {
switch status {
case .willShow:
print("Will Show")
case .didShow:
print("Did Show")
case .willHide:
print("Will Hide")
case .didHide:
print("Did Hide")
}
}
}
My problem is didKeyboardChangeStatus is not called.
It does not working in iOS 10 and iOS 11.
Related
Problem
I have an application that has a user registration view. It has many UITextField, and many of these have a picker with a toolbar embedded to close the picker i.e:
myTextField.inputView = myPicker
myTextField.inputAccessoryView = myToolbar
Essentially I want to reuse these text fields in different parts of my application, so I thought of subclassing UITextField, something like PickerUITextField.
Attempt
I've tried something like this:
class PickerUITextField: UITextField {
let picker = UIPickerView()
let toolbar = UIToolbar()
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
private func setup() {
withToolbar()
self.inputView = self.picker
self.inputAccessoryView = self.toolbar
}
private func withToolbar() {
toolbar.barStyle = UIBarStyle.default
toolbar.isTranslucent = true
let space = UIBarButtonItem(barButtonSystemItem: .flexibleSpace,
target: nil, action: nil)
let doneButton = UIBarButtonItem(title: "Done", style: .done,
target: self, action: #selector(removeToolBar))
toolbar.setItems([space, doneButton], animated: false)
toolbar.isUserInteractionEnabled = true
toolbar.sizeToFit()
}
#objc func removeToolBar() {
self.resignFirstResponder()
}
}
Question
However, how can I detect in the view controller that the user has pressed the "Done" button of my PickerUITextField? In other words:
class UserRegistrationViewController: UIViewController {
#IBOutlet weak var country: PickerUITextField!
// I want this to be triggered whenever the country picker closes
func didSelectCountry() {
print("User selected \(country.text!)")
}
}
Thank you for the help.
You can create a closure in PickerUITextField to perform done button action.
class PickerUITextField: UITextField {
let picker = UIPickerView()
let toolbar = UIToolbar()
var doneBtnAction:(() -> Void)?
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}
private func setup() {
withToolbar()
self.inputView = self.picker
self.inputAccessoryView = self.toolbar
}
private func withToolbar() {
toolbar.barStyle = UIBarStyle.default
toolbar.isTranslucent = true
let space = UIBarButtonItem(barButtonSystemItem: .flexibleSpace,
target: nil, action: nil)
let doneButton = UIBarButtonItem(title: "Done", style: .done,
target: self, action: #selector(removeToolBar))
toolbar.setItems([space, doneButton], animated: false)
toolbar.isUserInteractionEnabled = true
toolbar.sizeToFit()
}
#objc func removeToolBar() {
doneBtnAction?()
self.resignFirstResponder()
}
}
And in your view controller, you can assign a closure. It will be called when you tap the done button.
class UserRegistrationViewController: UIViewController {
#IBOutlet weak var country: PickerUITextField!
override func viewDidLoad() {
super.viewDidLoad()
country.doneBtnAction = { [weak self] in
print("User selected \(self?.country.text!)")
}
}
}
You can use a protocol/delegate:
protocol PickerUITextFieldDelegate: class {
func didSelectCountry()
}
class PickerUITextField: UITextField {
// UITextField already have a 'delegate' we need a different name
weak var pickerDelegate: PickerUITextFieldDelegate?
let picker = UIPickerView()
let toolbar = UIToolbar()
#objc func removeToolBar() {
self.resignFirstResponder()
self.pickerDelegate?.didSelectCountry()
}
}
// We need to implement the PickerUITextFieldDelegate delegate here:
class UserRegistrationViewController: UIViewController, PickerUITextFieldDelegate {
#IBOutlet weak var country: PickerUITextField!
// Don't forget to set the delegate!
override func viewDidLoad() {
super.viewDidLoad()
self.country.pickerDelegate = self
}
// This will now be triggered by the delegate
func didSelectCountry() {
print("User selected \(country.text!)")
}
}
I have implemented the new SearchController with its searchBar and the searchResultsController.
Here is how I implemented it :
The resultViewController:
lazy var resultViewController: SearchResultViewController = {
let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
let searchResultViewController = storyboard.instantiateViewController(withIdentifier: "SearchResultViewController") as! SearchResultViewController
searchResultViewController.delegate = self
return searchResultViewController
}()
And this is the SearchController:
lazy var searchController: UISearchController = {
let searchController = UISearchController(searchResultsController: resultViewController)
searchController.searchBar.delegate = self
searchController.obscuresBackgroundDuringPresentation = true
searchController.searchResultsUpdater = self
searchController.searchBar.placeholder = "Search.city.label".localizable()
searchController.searchBar.tintColor = UIColor.white
searchController.searchBar.barTintColor = UIColor.white
UITextField.appearance(whenContainedInInstancesOf: [type(of: searchController.searchBar)]).tintColor = UIColor(red:0.00, green:0.47, blue:0.78, alpha:1.0)
if let textfield = searchController.searchBar.value(forKey: "searchField") as? UITextField {
if let backgroundview = textfield.subviews.first {
// Background color
backgroundview.backgroundColor = UIColor.white
// Rounded corner
backgroundview.layer.cornerRadius = 10;
backgroundview.clipsToBounds = true;
}
}
definesPresentationContext = true
return searchController
}()
In my viewWillAppear I set the navigationItem.searchController :
self.searchController.isActive = true
if #available(iOS 11.0, *) {
self.navigationItem.searchController = searchController
self.navigationItem.hidesSearchBarWhenScrolling = true
} else {
// Fallback on earlier versions
}
I have been able to handle the cancelButtonClicked :
extension HomeViewController: UISearchBarDelegate {
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBar.endEditing(true)
self.searchController.isActive = false
}
}
This is doing the "cancel" animation, hiding keyboard + inactive state on searchBar/searchController. Both at the same time, with 1 tap on cancel Button.
But I am unable to achieve this when the user tap anywhere on the view.
I tried with tap gesture but it requires me 2 tap to achieve the same behavior.
NB:
I got an UICollectionView in my UIViewController, which takes all the place in the UIView.
Here is what I have tried :
override func viewDidLoad() {
super.viewDidLoad()
handleTapAnywhereToRemoveKeyboard()
}
func handleTapAnywhereToRemoveKeyboard() {
let singleTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.singleTap(sender:)))
//singleTapGestureRecognizer.numberOfTapsRequired = 1
singleTapGestureRecognizer.cancelsTouchesInView = false
self.view.addGestureRecognizer(singleTapGestureRecognizer)
}
#objc func singleTap(sender: UITapGestureRecognizer) {
self.searchController.isActive = false
self.searchController.searchBar.resignFirstResponder()
self.searchController.searchBar.endEditing(true)
}
EDIT:
I was thinking, maybe it's because my searchBar and searchController aren't in the UIViewController's view hierarchy, but more in the NavigationController one.
So I also tried with :
navigationController?.view.endEditing(true)
I then was thinking, maybe it's because the UIScrollView within my UICollectionView is catching the tap.
So I tried to link the tap gesture on the UICollectionView instead of the UIView, but without success.
There is no need to add UITapGestureRecognizer as proposed above. UIViewContoller already conforms to UIResponder interface (legacy from Objective C), so you can override this method like this:
extension UIViewController {
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.window?.endEditing(true)
super.touchesEnded(touches, with: event)
}
}
Please create UIViewController for dismiss keyboard througout application.
extension UIViewController {
func hideKeyboardWhenTappedAround() {
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)
}
#objc func dismissKeyboard() {
view.endEditing(true)
}
}
Use above code in your UIViewController file as below.
override func viewDidLoad() {
super.viewDidLoad()
self.hideKeyboardWhenTappedAround()
}
Update:
You can also use below code to dismiss keyboard from any class.
UIApplication.shared.sendAction(#selector(UIResponder.resign‌​FirstResponder), to: nil, from: nil, for: nil)
Try the solution from Dimple Desai but add the gesture recognizer to the TableView or CollectionView or whatever is laying on top of your UIView. Then it should work.
override func viewDidLoad(){
let tapView = UITapGestureRecognizer(target: self, action: #selector(self.hideKeyboard))
self.view.addGestureRecognizer(tapView)
}
#objc func hideKeyboard(tap: UITapGestureRecognizer){
self.view.endEditing(true)
}
So Im trying to create a UIBarButtonItem with a custom UIView by subclassing it like so.
import UIKit
import SnapKit
class LocationManager: UIBarButtonItem {
let createdView = UIView()
lazy var currentCityLabel: UILabel = {
let currentCityLabel = UILabel()
currentCityLabel.text = "Philadelphia, PA"
guard let customFont = UIFont(name: "NoirPro-SemiBold", size: 20) else {
fatalError("""
Failed to load the "CustomFont-Light" font.
Make sure the font file is included in the project and the font name is spelled correctly.
"""
)
}
currentCityLabel.adjustsFontForContentSizeCategory = true
return currentCityLabel
}()
lazy var downArrow: UIImageView = {
let downArrow = UIImageView()
downArrow.contentMode = .scaleAspectFit
downArrow.image = UIImage(named: "downArrow")
return downArrow
}()
override init() {
super.init()
setupViews()
}
#objc func setupViews(){
customView = createdView
createdView.addSubview(currentCityLabel)
currentCityLabel.snp.makeConstraints { (make) in
make.left.equalTo(createdView.snp.left)
make.top.bottom.equalTo(createdView)
}
createdView.addSubview(downArrow)
downArrow.snp.makeConstraints { (make) in
make.left.equalTo(currentCityLabel.snp.right).offset(5)
}
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
However, when I create it and assign it in my viewController I see nothing
import UIKit
class ViewController: UICollectionViewController {
override func viewDidLoad() {
super.viewDidLoad()
setupViews()
}
#objc func setupViews(){
guard let collection = collectionView else {
return
}
collection.backgroundColor = .white
let customLeftBar = LocationManager()
self.navigationController?.navigationItem.leftBarButtonItem = customLeftBar
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I've looked at other post and none seem to quite match my situation. I'm beginning to think it is because I didn't give the UIView a frame but I am not exactly sure how I would do that in this instance if that is the case. Anyone see anything I don't that could potentially help me solve this problem. Also setting a target doesn't work I tried two different ways and none of them triggers a thing
#objc func setupBarButtonItems(){
let customLeftBar = LocationManager()
customLeftBar.action = #selector(self.leftBarPressed)
customLeftBar.target = self
customLeftBar.customView?.isUserInteractionEnabled = true
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.leftBarPressed))
customLeftBar.customView?.addGestureRecognizer(tapGesture)
navigationItem.leftBarButtonItem = customLeftBar
}
#objc func leftBarPressed(){
print("left bar tapped")
}
Change your adding line from
self.navigationController?.navigationItem.leftBarButtonItem = customLeftBar
to
self.navigationItem.leftBarButtonItem = customLeftBar
When add the barItem, you need to add it via navigationItem of the ViewController, not NavigationController
EDITED for add the action
Your custom UIBarButtonItem is a Custom View's BarButtonItem, so the target and selector will not working.
You can add your custom action by adding a button into your customView, and send the action via closure
Init your closure
var didSelectItem: (() -> Void)?
Add the create button code in your #objc func setupViews()
let button = UIButton(type: .custom)
createdView.addSubview(button)
button.snp.makeConstraints { (maker) in
maker.top.bottom.leading.trailing.equalTo(createdView)
}
// button.backgroundColor = UIColor.cyan // uncomment this line for understand about the barbuttonitem's frame
button.addTarget(self, action: #selector(didTap(_:)), for: .touchUpInside)
and add the function
#objc func didTap(_ button: UIButton) {
print("Did tap button")
}
In your viewController, you can get the tap action by
customLeftBar.didSelectItem = { [weak self] in
self?.leftBarPressed()
}
Unfortunately, your barbuttonitem's default frame is 30x30, so you must be set the frame for your barbuttonitem. If not, you can only catch the tap action in 30x30 area (uncomment the code for see it)
I tried calling tabBarController!.tabBar.hidden = true in viewDidLoad() and it hides the TabBar. However, I tried to set tap gesture and hide the bar on Tap. The parent viewController that has ScrollView inside it with subview (that is connected with IBOutlet as myView)
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: Selector("handleTap:"))
myView.addGestureRecognizer(tap)
}
func handleTap(sender: UITapGestureRecognizer? = nil) {
print("A") // logs successfully
if TabBarHidden == false {
print("B") // logs successfully
//I tried:
tabBarController?.tabBar.hidden = true
// I also tried
tabBarController?.tabBar.alpha = 0
tabBarController?.tabBar.frame.origin.x += 50
hidesBottomBarWhenPushed = true
} else {
...
TabBarHidden = false
}
}
hidden does work when I call it in viewDidLoad as I said, but not if I call in tap gesture function. What may be the problem? What am I missing?
this code totally works for me:
class ViewController: UIViewController {
var tabBarHidden: Bool = false {
didSet {
tabBarController?.tabBar.hidden = tabBarHidden
}
}
override func viewDidLoad() {
super.viewDidLoad()
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(tapGestureRecognized(_:)))
view.addGestureRecognizer(tapGestureRecognizer)
}
func tapGestureRecognized(sender: UITapGestureRecognizer) {
tabBarHidden = !tabBarHidden
}
}
I am trying to update a button's constraints when the keyboard is shown and hidden by adding/subtracting the keyboard's height from the constraint's constant.
I had this working previously, but after some re-factoring, it's stopped working. Previously, keyboardWillShow: and keyboardWillHide: were implemented exactly as shown below. I've since tried to use setNeedsUpdateConstraints and setNeedsLayout to try to force a refresh, to no avail.
When doing some simple print() debugging, buttonHorizontalConstraint.constant does get updated, but the changes just aren't reflected visually.
RegistrationNameView.swift
class RegistrationNameView: UIView {
let questionLabel: UILabel = {
let label = UILabel()
label.font = UIFont.systemFontOfSize(21.0)
label.text = "Hey, what's your name?"
label.textAlignment = .Center
label.textColor = UIColor.lightGrayColor()
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let nameField: UITextField = {
let field = UITextField()
field.autocorrectionType = .No
field.font = UIFont.boldSystemFontOfSize(28.0)
field.placeholder = "Full name"
field.returnKeyType = .Next
field.textAlignment = .Center
field.translatesAutoresizingMaskIntoConstraints = false
return field
}()
let nextButton: UIButton = {
let button = UIButton()
button.setTitle("Continue", forState: .Normal)
button.setTitleColor(UIColor.whiteColor(), forState: .Normal)
button.titleLabel?.font = UIFont.boldSystemFontOfSize(17.0)
button.backgroundColor = UIColor(red: 0.263, green: 0.910, blue: 0.847, alpha: 1)
button.layer.cornerRadius = Global.UISizes.CornerRadius
button.translatesAutoresizingMaskIntoConstraints = false
button.contentEdgeInsets = UIEdgeInsetsMake(16.0, 0, 16.0, 0)
return button
}()
var buttonHorizontalConstraint = NSLayoutConstraint()
override init(frame: CGRect) {
super.init(frame: frame)
self.backgroundColor = UIColor.whiteColor()
// Add subviews
self.addSubview(questionLabel)
self.addSubview(nameField)
self.addSubview(nextButton)
nameField.becomeFirstResponder()
// Constraint helpers
let spacer = Global.UISizes.SpacingUnit
let margins = self.layoutMarginsGuide
let layoutConstraints: [NSLayoutConstraint] = {
var constraints = [NSLayoutConstraint]()
// Title Label Constraints
constraints.append(
questionLabel.bottomAnchor.constraintEqualToAnchor(nameField.topAnchor, constant: -(spacer * 2)))
constraints.append(questionLabel.leadingAnchor.constraintEqualToAnchor(margins.leadingAnchor))
constraints.append(questionLabel.trailingAnchor.constraintEqualToAnchor(margins.trailingAnchor))
// Description Label Constraints
constraints.append(nameField.topAnchor.constraintEqualToAnchor(margins.centerYAnchor, constant: spacer * -12))
constraints.append(nameField.leadingAnchor.constraintEqualToAnchor(margins.leadingAnchor))
constraints.append(nameField.trailingAnchor.constraintEqualToAnchor(margins.trailingAnchor))
// Sign Up Button Constraints
self.buttonHorizontalConstraint = nextButton.bottomAnchor.constraintEqualToAnchor(margins.bottomAnchor, constant: -(spacer * 2))
constraints.append(self.buttonHorizontalConstraint)
constraints.append(nextButton.leadingAnchor.constraintEqualToAnchor(margins.leadingAnchor))
constraints.append(nextButton.trailingAnchor.constraintEqualToAnchor(margins.trailingAnchor))
return constraints
}()
NSLayoutConstraint.activateConstraints(layoutConstraints)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo! as NSDictionary).objectForKey(UIKeyboardFrameBeginUserInfoKey)?.CGRectValue.size {
self.buttonHorizontalConstraint.constant -= keyboardSize.height
}
}
func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo! as NSDictionary).objectForKey(UIKeyboardFrameBeginUserInfoKey)?.CGRectValue.size {
self.buttonHorizontalConstraint.constant += keyboardSize.height
}
}
}
RegistrationNameViewController.swift
class RegistrationNameViewController: UIViewController {
var nameView: RegistrationNameView! { return self.view as! RegistrationNameView }
override func viewDidLoad() {
super.viewDidLoad()
let nameView = RegistrationNameView(frame: CGRectZero)
nameView.nextButton.addTarget(self, action: "nextStep:", forControlEvents: .TouchUpInside)
self.view = nameView
}
func nextStep(sender: AnyObject) {
print("going to the next step \(sender)")
let credentialsViewController = RegistrationCredentialsViewController()
self.navigationController?.pushViewController(credentialsViewController, animated: true)
}
}
RegistrationNavigationController.swift
class RegistrationNavigationController: UINavigationController, UINavigationControllerDelegate {
var nameViewController: RegistrationNameViewController = RegistrationNameViewController()
var credViewController: RegistrationCredentialsViewController = RegistrationCredentialsViewController()
override init(rootViewController: UIViewController) {
super.init(rootViewController: rootViewController)
self.delegate = self
}
override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
func navigationController(navigationController: UINavigationController, willShowViewController viewController: UIViewController, animated: Bool) {
let type = String(viewController.dynamicType)
switch type {
case "RegistrationNameViewController":
// Add keyboard notifications to RegistrationNameViewController
NSNotificationCenter.defaultCenter().addObserver(nameViewController.view,
selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(nameViewController.view,
selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
case "RegistrationCredentialsViewController":
// Remove keyboard notifications to RegistrationNameViewController before
// registering for new notifications
NSNotificationCenter.defaultCenter().removeObserver(nameViewController.view)
// Add keyboard notifications to RegistrationCredentialsViewController
NSNotificationCenter.defaultCenter().addObserver(credViewController.view,
selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(credViewController.view,
selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
default:
print("Default")
}
}
}
Thank you for the help!
I solved this on my own after some digging.
I believe the problem is that the NSNotificationCenter observer registrations were happening on a background thread, which caused the methods that actually impacted UI to not actually change the UI.
Instead of registering observers in navigationController:willShowViewController:animated:, I register them in viewWillAppear and unregister them in viewWillDisappear. This happens in RegistrationNameViewController instead of RegistrationNavigationController.
RegistrationNameViewController.swift
override func viewWillAppear(animated:
NSNotificationCenter.defaultCenter().addObserver(self.view,
selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self.view,
selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
(self.view as! RegistrationNameView).nameField.becomeFirstResponder()
}
override func viewWillDisappear(animated: Bool) {
NSNotificationCenter.defaultCenter().removeObserver(self.view)
}
This makes navigationController:willShowViewController:animated: unnecessary, and it can be removed from RegistrationNavigationController.swift