@Boris: To nie powinno być przedłużeniem.
Tutaj jest w szybkim 3, z ulepszonym kodem: wyłącza przycisk, działa z obrazami i tytułami.
class LoadingButton: UIButton {
struct ButtonState {
var state: UIControlState
var title: String?
var image: UIImage?
}
private (set) var buttonStates: [ButtonState] = []
private lazy var activityIndicator: UIActivityIndicatorView = {
let activityIndicator = UIActivityIndicatorView()
activityIndicator.hidesWhenStopped = true
activityIndicator.color = self.titleColor(for: .normal)
self.addSubview(activityIndicator)
activityIndicator.translatesAutoresizingMaskIntoConstraints = false
let xCenterConstraint = NSLayoutConstraint(item: self, attribute: .centerX, relatedBy: .equal, toItem: activityIndicator, attribute: .centerX, multiplier: 1, constant: 0)
let yCenterConstraint = NSLayoutConstraint(item: self, attribute: .centerY, relatedBy: .equal, toItem: activityIndicator, attribute: .centerY, multiplier: 1, constant: 0)
self.addConstraints([xCenterConstraint, yCenterConstraint])
return activityIndicator
}()
func showLoading() {
activityIndicator.startAnimating()
var buttonStates: [ButtonState] = []
for state in [UIControlState.disabled] {
let buttonState = ButtonState(state: state, title: title(for: state), image: image(for: state))
buttonStates.append(buttonState)
setTitle("", for: state)
setImage(UIImage(), for: state)
}
self.buttonStates = buttonStates
isEnabled = false
}
func hideLoading() {
activityIndicator.stopAnimating()
for buttonState in buttonStates {
setTitle(buttonState.title, for: buttonState.state)
setImage(buttonState.image, for: buttonState.state)
}
isEnabled = true
}
}
Czyste i proste, dzięki! – clemkoa
Do podstawowego użytku, który wygląda świetnie. +1 –