In my application I need to get keyboard size for after move the others components to correctly position, now i'm using that code to get height
let info:NSDictionary = aNotification.userInfo! as NSDictionary
let kbSize:CGSize = (info.object(forKey: UIResponder.keyboardFrameEndUserInfoKey)! as AnyObject).cgRectValue.size
print(kbSize.height)
In the first time when keyboard is open the result is 260.0, but this value is size default, without the suggestions/passwords bar height, when I click out and click in the input again the result is 304.0 the value I want...
How I can get 304 since the first click in the input?
You should be listening for changes in the keyboard's size and adjusting the rest of your content that way, since, as you found out, iOS keyboards can change size. You should subscribe to UIResponder.keyboardWillChangeFrameNotification and/or UIResponder.keyboardDidChangeFrameNotification which are notifications which trigger when the keyboard's frame will, or did, change. Here's an example of it in use:
// Somewhere in set up code
NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidChangeFrame),
name: UIResponder.keyboardDidChangeFrameNotification, object: nil)
// Function elsewhere in your class
#objc func keyboardDidChangeFrame(_ notification: Notification) {
guard let kbSize = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey]
as? CGRect else {
return;
}
// Use kbRect as you initially did
}
Note that you can use either the Will or the Did notifications depending on how you want the layout change to look. You can also query both UIResponder.keyboardFrameBeginUserInfoKey UIResponder.keyboardFrameEndUserInfoKey to get the keyboard frame before and after the size change, which may be useful if you want to animate your layout along with the keyboard.
You can try this;
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
}
deinit {
NotificationCenter.default.removeObserver(UIResponder.keyboardWillShowNotification)
NotificationCenter.default.removeObserver(UIResponder.keyboardWillHideNotification)
NotificationCenter.default.removeObserver(UIResponder.keyboardWillChangeFrameNotification)
}
#objc func keyboardWillChange(notification: Notification) {
guard let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else { return }
if notification.name == UIResponder.keyboardWillChangeFrameNotification || notification.name == UIResponder.keyboardWillShowNotification {
view.frame.origin.y = -keyboardSize.height
} else {
view.frame.origin.y = 0
}
}
}
HERE is the Github gist
Related
I'm trying to update the constraints of my view when the keyboard appears and disappears
I have notifications for keyboardWillShow and keyboardWillHide and corresponding functions to call them:
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name:UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
#objc private func keyboardWillShow(notification: NSNotification) {
if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
let keyboardFrameEnd = keyboardFrame.cgRectValue
let convertedKeyboardFrameEnd = self.view.convert(keyboardFrameEnd, from: nil)
let intersection = convertedKeyboardFrameEnd.intersection(listView.frame)
if intersection.size.height > 0 {
self.listView.snp.makeConstraints { make in
make.top.leading.trailing.equalTo(0)
make.bottom.equalTo(-intersection.height)
}
self.view.setNeedsLayout()
self.view.layoutIfNeeded()
}
}
}
#objc private func keyboardWillHide() {
self.listView.snp.makeConstraints { make in
make.edges.equalTo(0)
make.bottom.equalTo(0)
}
self.listView.setNeedsUpdateConstraints()
self.listView.updateConstraints()
self.view.setNeedsLayout()
self.view.layoutIfNeeded()
}
It seems that keyboardWillShow gets called and updates the size of my listView to be the visible size outside of the keyboard. However, keyboardWillHide gets called and it doesn't seem to update the bottom back to have value 0 so I end up with a case where my view is not resized back to its original size. Any ideas what might be wrong here?
This is my view.
When I click inside the text view the keyboard was coming on top. so I added made a class and in that class, I added these functions.
var objectObserver:UIViewController?
func setKeyboardResponsiviness(observer:UIViewController){
objectObserver = observer
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if objectObserver!.view.frame.origin.y == 0 {
objectObserver!.view.frame.origin.y -= keyboardSize.height
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if objectObserver!.view.frame.origin.y != 0 {
objectObserver!.view.frame.origin.y = 0
}
}
After adding the code the whole screen slides up which was the intended goal but as a side effect, half of the text view is out of the screen. Any idea how I can fix this?
The simple solution is to use IQKeyboardManagerSwift.
pod 'IQKeyboardManagerSwift' // add this in your pod file.
Add the following code in didFinishLaunchingWithOptions.
IQKeyboardManager.shared.enable = true
I hope this helps.
Like so many other threads here I need to move a view up so its visible while they keyboard is visible and the correct answer seems to be this in most cases:
var isKeyboardVisible = false
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if !isKeyboardVisible {
if let keyboardRectValue = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight = keyboardRectValue.height
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardHeight
}
}
isKeyboardVisible = true
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if isKeyboardVisible {
if let keyboardRectValue = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight = keyboardRectValue.height
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y += keyboardHeight
}
}
isKeyboardVisible = false
}
}
This however doesn't work if the user uses a custom keyboard.
keyboardHeight is 0 if a custom keyboard is used. But if the stock keyboard is used the height seems correct.
Can be reproduced if you install Google GBoard and try to get the height of the keyboard.
I'm quite certain I'm not the only one using a custom keyboard, so I guess there should be some kind of solution for this problem which is dynamic and doesn't include a long if/else list.
Addition 1: I found this answer which suggests to add an inputAccessoryView to the textfield. This makes perfect sense to me as this view will always be exactly above the keyboard. There is how ever two problems with this.
One, content is still being hidden behind the keyboard.
Two, if the textfield which is currently focused is behind the keyboard, should I add a duplicate of it to the ´ inputAccessoryView´ so whatever is written is shown in both? This seems like a lot of extra work.
What does apps like whatsapp do to solve this? There must be a universal way to adapt the content to fit above any keyboard (stock or custom) and also not disappear above the top part of the screen!?!?
So this is the cleanest way I've found.
Swift 4.2
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardShowHide), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardShowHide), name: UIResponder.keyboardWillHideNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardShowHide), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
}
#objc func keyboardShowHide(notification: NSNotification) {
if let keyboardRectValue = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
self.view.frame.size.height = UIScreen.main.bounds.height - keyboardRectValue.height
}
}
Many solutions for getting the the necessary view above the keyboard is to move all the content up and beyond the screen limit. I consider this bad practice there the will be content totally inaccessible to the user outside of the screen as long as the keyboard is visible.
As in my solution above I prefer to adjust the size of the content instead of moving it. So if the content is in a tableview or a scrollview everything will still be available while the keyboard is visible.
If you however prefer that approach just change this line:
self.view.frame.size.height = UIScreen.main.bounds.height - keyboardRectValue.height
for this:
self.view.frame.origin.y = -keyboardRectValue.height
In my app, I wanted a notification for UIResponder.keyboardWillShowNotification in order to update the y position of my text field. It was working prior to iOS 12; now, it is not called in one of my view controllers (it works for other ones).
Here is my code to do this:
#objc func keyboardWillShow(_ notification: Notification) {
print("keyboard will show 2")
guard let frameValue: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else {
return
}
let keyboardFrame = frameValue.cgRectValue
UIView.animate(withDuration: animationTime) {
self.addViewBottomConstraint.constant = keyboardFrame.size.height
self.view.layoutIfNeeded()
print("Bottom contraint height = \(self.addViewBottomConstraint.constant)")
}
}
#objc func keyboardWillHide(_ notification: Notification) {
UIView.animate(withDuration: animationTime) {
self.addViewBottomConstraint.constant = 0
self.view.layoutIfNeeded()
}
}
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
Here, "keyboard will show 2" is not printed, but it is printed for other view controllers with the same notifications. Is there anything new in iOS 12 that caused this? Otherwise, is there a particular reason why it is not being called?
This can be related to simulator setup, see menu "Hardware > Keyboard > Connect Keyboard Hardware". If this option is ON, you will get UIKeyboardWillHideNotification, but never UIKeyboardWillShowNotification.
I have a view which is resize a constraint when the keyboard appear. So I have notifications when the keyboard appears and disappears.
The above behaviour occurs when the keyboard is already shown and I rotate the screen. Then the next actions occurs:
UIKeyboardWillHideNotification called
UIKeyboardWillShowNotification called (with the old height of the keyboard)
UIKeyboardWillShowNotification called (with the new height of the keyboard)
So, the updateView function receives first one height and later a different height. This results in a weird movements of the view adjusting twice the value.
override func viewDidLoad() {
super.viewDidLoad()
// Creates notification when keyboard appears and disappears
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}
func keyboardWillShow(notification: NSNotification) {
self.adjustingHeight(true, notification: notification)
}
func keyboardWillHide(notification: NSNotification) {
self.adjustingHeight(false, notification: notification)
}
private func adjustingHeight(show: Bool, notification: NSNotification) {
// Gets notification information in an dictionary
var userInfo = notification.userInfo!
// From information dictionary gets keyboard’s size
let keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()
// Gets the time required for keyboard pop up animation
let animationDurarion = userInfo[UIKeyboardAnimationDurationUserInfoKey] as! NSTimeInterval
// Animation moving constraint at same speed of moving keyboard & change bottom constraint accordingly.
if show {
self.bottomConstraint.constant = (CGRectGetHeight(keyboardFrame) + self.bottomConstraintConstantDefault / 2)
} else {
self.bottomConstraint.constant = self.bottomConstraintConstantDefault
}
UIView.animateWithDuration(animationDurarion) {
self.view.layoutIfNeeded()
}
self.hideLogoIfSmall()
}
Finally I found the solution. When I get keyboardFrame, I was using UIKeyboardFrameBeginUserInfoKey which returns the frame of the keyboard before the animation begins. The correct way of do that is with UIKeyboardFrameEndUserInfoKeywhich returns the frame of the keyboard after the animation has completed.
let keyboardFrame: CGRect = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()