UITextField inside UIColletionViewCell becomeFirstResponder - swift

Question

I know this question might have a lot of answers on SO. But after trying every solution found on the interweb (+ some of my custom inventions ..) I still can't do what I want to achieve.
Here is the story :
I have a UICollectionViewCell with a Subclass of a UITextField embeded in it.
Here is my Subclass :
class CustomTextField: UITextField {
private let padding = UIEdgeInsets(top: 6.0, left: 0.0, bottom: 0.0, right: 2.0)
private lazy var lineView: UIView = {
let lineView = UIView()
lineView.translatesAutoresizingMaskIntoConstraints = false
lineView.isUserInteractionEnabled = false
lineView.frame.size.height = 2
lineView.backgroundColor = UIColor.tiara
return lineView
}()
override func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.inset(by: padding)
}
override func placeholderRect(forBounds bounds: CGRect) -> CGRect {
return bounds.inset(by: padding)
}
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return bounds.inset(by: padding)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
func toggleColors() {
if isFirstResponder {
lineView.backgroundColor = .black
} else {
lineView.backgroundColor = UIColor.tiara
}
}
}
private extension CustomTextField {
func commonInit() {
addSubview(lineView)
constraintLineView()
textColor = UIColor.tiara
}
func constraintLineView() {
lineView.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
lineView.widthAnchor.constraint(equalTo: widthAnchor).isActive = true
lineView.centerXAnchor.constraint(equalTo: centerXAnchor).isActive = true
lineView.heightAnchor.constraint(equalToConstant: 2.0).isActive = true
}
}
And here is the code I use in my UICollectionViewCell :
#discardableResult
func setFirstResponder() -> Bool {
return customTextField.becomeFirstResponder()
}
func endEditing() {
customTextField.resignFirstResponder()
}
The result of customTextField.becomeFirstResponder is always false.
It's called from my UIViewController :
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
guard indexPath.row != 0 else { return }
dispatchService.stop()
let topIndexPath = IndexPath(item: 0, section: 0)
let topCell: Cell = collectionView.dequeueReusableCell(for: topIndexPath)
topCell.endEditing()
service.data.rearrange(from: indexPath.row, to: 0)
update()
collectionView.performBatchUpdates({
collectionView.moveItem(at: indexPath, to: topIndexPath)
collectionView.scrollToItem(at: topIndexPath, at: .top, animated: true)
}) { (_) in
let secondCell: Cell = collectionView.dequeueReusableCell(for: topIndexPath)
secondCell.setFirstResponder()
self.dispatchService.reset()
}
}
I really don't know where to start, this is the last solution I came with and it stills stays without any keyboard displayed.
I am working on a real device, iPhone X iOS 12.1.

Answer 1

I may not have the quiet right answer but, I think the problem comes from the way you are getting your cell inside collectionView(didSelectItemAt:).
You are using the dequeueReusableCell instead of using cellForItem(at:) for getting your cells. So you are creating a reusable cell and not getting the one you are interested in.