Can't get keyboard height when using Interactive keyboard dismissal - ios

Question

I have been trying to implement interactive keyboard like in 'iMessages' app Something like this;
I need to continuously get exact frame of keyboard when sliding it up or down.
I have already tried; keyboardWillChangeFrame, keyboardDidChangeFrame, keyboardWillShowForResizing, keyboardWillHideForResizing, keyboardWillShow, keyboardWillBeHidden None of them continuously return the frame. What is the best way to catch that frame?

Answer 1

That's a tricky & Simple.
ViewController inherits UIResponder
open class UIViewController : UIResponder, NSCoding, UIAppearanceContainer, UITraitEnvironment, UIContentContainer, UIFocusEnvironment
So it can become first responder since it can have input accessory view too.
What you have to do is
1) Go to Storyboard -> ViewController and then select your tableview and change keyboard dismiss type to
2) In your Viewcontroller
Add following code
var viewAcc : UIView? // That contains TextFied and send button
override var inputAccessoryView: UIView? {
return viewAcc
}
override var canBecomeFirstResponder: Bool {
return true
}
For you I have created simple Textfield and send button as example you can modify it with your's
func setupView () {
self.tblChatDetail.contentInset = UIEdgeInsetsMake(0, 0, 20, 0)
viewAcc = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 44))
viewAcc?.backgroundColor = UIColor.white
textView = UITextView (frame: CGRect(x:0, y:0, width:0,height: 44 - 0.5))
textView.textContainerInset = UIEdgeInsetsMake(4, 3, 3, 3)
textView.delegate = self
viewAcc?.backgroundColor = .lightGray
viewAcc?.addSubview(textView);
sendButton = UIButton(type: .system)
sendButton.isEnabled = true
sendButton.titleLabel?.font = UIFont.boldSystemFont(ofSize: 17)
sendButton.setTitle("Send", for: .normal)
sendButton.contentEdgeInsets = UIEdgeInsets(top: 6, left: 6, bottom: 6, right: 6)
sendButton.addTarget(self, action: #selector(ChatDetailViewController.sendMessage), for: UIControlEvents.touchUpInside)
viewAcc?.addSubview(sendButton)
textView.translatesAutoresizingMaskIntoConstraints = false
sendButton.translatesAutoresizingMaskIntoConstraints = false
viewAcc?.addConstraint(NSLayoutConstraint(item: textView, attribute: .left, relatedBy: .equal, toItem: viewAcc, attribute: .left, multiplier: 1, constant: 8))
viewAcc?.addConstraint(NSLayoutConstraint(item: textView, attribute: .top, relatedBy: .equal, toItem: viewAcc, attribute: .top, multiplier: 1, constant: 7.5))
viewAcc?.addConstraint(NSLayoutConstraint(item: textView, attribute: .right, relatedBy: .equal, toItem: sendButton, attribute: .left, multiplier: 1, constant: -2))
viewAcc?.addConstraint(NSLayoutConstraint(item: textView, attribute: .bottom, relatedBy: .equal, toItem: viewAcc, attribute: .bottom, multiplier: 1, constant: -8))
viewAcc?.addConstraint(NSLayoutConstraint(item: sendButton, attribute: .right, relatedBy: .equal, toItem: viewAcc, attribute: .right, multiplier: 1, constant: 0))
viewAcc?.addConstraint(NSLayoutConstraint(item: sendButton, attribute: .bottom, relatedBy: .equal, toItem: viewAcc, attribute: .bottom, multiplier: 1, constant: -4.5))
}
Just run and Bang on !!