I am experiencing memory leaks in my iOS app that seem to be related to an issue between UIInputView and _UIInputViewContent. After using the memory graph, I'm seeing that instances of these objects aren't being deallocated properly.
The UIInputViewController whichs holds the inputView is being deallocated properly along with its subviews.I have tried to remove all of UIInputViewController's subviews and their functions but the uiInputView is not being deallocated.
The current setup of my app is a collectionView with multiple cell,each possessing a textfield with holds a UIInputViewController.When i scroll up or down,the views are being reused as expected and the number of UIInputViewController stays consistent with the number of textfields.However the number of inputView keeps increasing referencing solely _UIInputViewContent.
class KeyboardViewController: UIInputViewController {
// Callbacks
var key1: ((String) -> Void)?
var key2: (() -> Void)?
var key3: (() -> Void)?
var key4: (() -> Void)?
private lazy var buttonTitles = [
["1", "2", "3"],
["4", "5", "6"],
["7", "8", "9"]
]
override func viewDidLoad() {
super.viewDidLoad()
setupKeyboard()
}
lazy var mainStackView: UIStackView = {
let mainStackView = UIStackView()
mainStackView.axis = .vertical
mainStackView.distribution = .fillEqually
mainStackView.spacing = 16
mainStackView.translatesAutoresizingMaskIntoConstraints = false
return mainStackView
}()
private func setupKeyboard() {
let keyboardView = UIView(frame:CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 279.0))
keyboardView.addSubview(mainStackView)
NSLayoutConstraint.activate([
mainStackView.topAnchor.constraint(equalTo: keyboardView.topAnchor, constant: 16),
mainStackView.leadingAnchor.constraint(equalTo: keyboardView.leadingAnchor, constant: 0),
mainStackView.trailingAnchor.constraint(equalTo: keyboardView.trailingAnchor, constant: -24),
mainStackView.bottomAnchor.constraint(equalTo: keyboardView.bottomAnchor, constant: -35)
])
// Create rows
for (_, _) in buttonTitles.enumerated() {
let rowStackView = UIStackView()
rowStackView.axis = .horizontal
rowStackView.distribution = .fillEqually
rowStackView.spacing = 1
// Create buttons for each row
for title in rowTitles {
let button = createButton(title: title)
rowStackView.addArrangedSubview(button)
}
mainStackView.addArrangedSubview(rowStackView)
}
self.view = keyboardView
}
private func createButton(title: String) -> UIButton {
switch title {
///returns a uibutton based on title
}
}
// MARK: - Button Actions
@objc private func numberTapped(_ sender: UIButton) {
if let number = sender.title(for: .normal) {
key1?(number)
}
}
@objc private func key2Called() {
key2?()
}
@objc private func key3Called() {
key3?()
}
@objc private func key4Called() {
key4?()
}
deinit {
// Clear any strong references
key1 = nil
key2 = nil
key3 = nil
key4 = nil
for subview in mainStackView.arrangedSubviews {
if let stackView = subview as? UIStackView {
for button in stackView.arrangedSubviews {
(button as? UIButton)?.removeTarget(self, action: nil, for: .allEvents)
}
}
}
mainStackView.removeFromSuperview()
}
}
Environment
iOS 16.3
Xcode 18.3.1
Any insights would be greatly appreciated as this is causing noticeable memory growth in my app over time.
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