Hiding/Showing Input Accessory View - ios

Question

I have a custom inputAccessoryView and am trying to toggle hiding/showing it. I don't want to utilize .isHidden or .removeFromSuperView(), rather, use the bottom slide in/out, which seems to be native as I present other viewControllers onto the hierarchy and this animation executes.
I've tried to resignFirstResponder with no luck and there doesn't seem to be any existing commentary around this. Any thoughts would be appreciated as I am admittedly stumped.
class CustomInputAccessoryView: UIView {
let customTextView: CustomInputTextView = {
let tv = CustomInputTextView()
tv.isScrollEnabled = false
return tv
}()
override init(frame: CGRect) {
super.init(frame: frame)
backgroundColor = UIColor.white
autoresizingMask = .flexibleHeight
addSubview(customTextView)
customTextView.topAnchor.constraint(equalTo: topAnchor, constant: 12).isActive = true
customTextView.bottomAnchor.constraint(equalTo: safeAreaLayoutGuide.bottomAnchor, constant: 8).isActive = true
customTextView.leftAnchor.constraint(equalTo: leftAnchor, constant: 10).isActive = true
customTextView.rightAnchor.constraint(equalTo: rightAnchor, constant: 10).isActive = true
customTextView.heightAnchor.constraint(greaterThanOrEqualToConstant: frame.height - 20).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override var intrinsicContentSize: CGSize {
return .zero
}
}
class CustomInputTextView: UITextView {
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
}
override var canResignFirstResponder: Bool {
return true
}
override var canBecomeFirstResponder: Bool {
return true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init coder has not been implemented")
}
}
//in viewcontroller
lazy var inputContainerView: CustomInputAccessoryView = {
let frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: 60)
let customInputAccessoryView = CustomInputAccessoryView(frame: frame)
return customInputAccessoryView
}()
//onLoad
override var inputAccessoryView: UIView? {
get { return inputContainerView }
}

Answer 1

I don't know if this is really what you're going for, but give it a try.
Tapping anywhere in the view will show/hide the input accessory view:
class TestInputViewController: UIViewController {
//in viewcontroller
lazy var inputContainerView: CustomInputAccessoryView = {
let frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: 60)
let customInputAccessoryView = CustomInputAccessoryView(frame: frame)
return customInputAccessoryView
}()
override var canBecomeFirstResponder: Bool {
return true
}
//onLoad
override var inputAccessoryView: UIView? {
get { return inputContainerView }
}
override func viewDidLoad() {
super.viewDidLoad()
// so we can see the frame
inputContainerView.backgroundColor = .blue
// tap anywhere in view to show / hide input accessory view
let g = UITapGestureRecognizer(target: self, action: #selector(didTap(sender:)))
view.addGestureRecognizer(g)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
}
#objc func didTap(sender: UITapGestureRecognizer) {
if self.isFirstResponder {
resignFirstResponder()
} else {
becomeFirstResponder()
}
}
}
class CustomInputAccessoryView: UIView {
let customTextView: CustomInputTextView = {
let tv = CustomInputTextView()
tv.isScrollEnabled = false
return tv
}()
override init(frame: CGRect) {
super.init(frame: frame)
backgroundColor = UIColor.white
autoresizingMask = .flexibleHeight
addSubview(customTextView)
customTextView.translatesAutoresizingMaskIntoConstraints = false
customTextView.topAnchor.constraint(equalTo: topAnchor, constant: 12).isActive = true
customTextView.bottomAnchor.constraint(equalTo: safeAreaLayoutGuide.bottomAnchor, constant: -8).isActive = true
customTextView.leftAnchor.constraint(equalTo: leftAnchor, constant: 10).isActive = true
customTextView.rightAnchor.constraint(equalTo: rightAnchor, constant: -10).isActive = true
customTextView.heightAnchor.constraint(greaterThanOrEqualToConstant: frame.height - 20).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override var intrinsicContentSize: CGSize {
return .zero
}
}
class CustomInputTextView: UITextView {
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
}
override var canResignFirstResponder: Bool {
return true
}
override var canBecomeFirstResponder: Bool {
return true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init coder has not been implemented")
}
}
Not related to showing / hiding, but a few of your constraints were wrong, causing the text view to be misplaced.