Created
April 5, 2023 19:52
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import UIKit | |
struct Colors { | |
static let background = #colorLiteral(red: 0.657153666, green: 0.8692060113, blue: 0.6173200011, alpha: 1) | |
static let draggedBackground = #colorLiteral(red: 0.462745098, green: 0.7843137255, blue: 0.5764705882, alpha: 1) | |
static let tint = #colorLiteral(red: 0.1019607843, green: 0.4588235294, blue: 0.6235294118, alpha: 1) | |
} | |
protocol SlideToActionButtonDelegate: AnyObject { | |
func didFinish() | |
} | |
class SlideToActionButton: UIView { | |
let handleView: UIView = { | |
let view = UIView() | |
view.translatesAutoresizingMaskIntoConstraints = false | |
view.backgroundColor = Colors.draggedBackground | |
view.layer.cornerRadius = 12 | |
view.layer.masksToBounds = true | |
view.layer.borderWidth = 3 | |
view.layer.borderColor = Colors.tint.cgColor | |
return view | |
}() | |
let handleViewImage: UIImageView = { | |
let view = UIImageView() | |
view.translatesAutoresizingMaskIntoConstraints = false | |
view.image = UIImage(systemName: "chevron.right.2", withConfiguration: UIImage.SymbolConfiguration(font: .systemFont(ofSize: 40, weight: .bold)))?.withRenderingMode(.alwaysTemplate) | |
view.contentMode = .scaleAspectFit | |
view.tintColor = Colors.tint | |
return view | |
}() | |
let draggedView: UIView = { | |
let view = UIView() | |
view.translatesAutoresizingMaskIntoConstraints = false | |
view.backgroundColor = Colors.draggedBackground | |
view.layer.cornerRadius = 12 | |
return view | |
}() | |
let titleLabel: UILabel = { | |
let label = UILabel() | |
label.translatesAutoresizingMaskIntoConstraints = false | |
label.textAlignment = .center | |
label.textColor = Colors.tint | |
label.font = .systemFont(ofSize: 24, weight: .semibold) | |
label.text = "Slide me!" | |
return label | |
}() | |
private var leadingThumbnailViewConstraint: NSLayoutConstraint? | |
private var panGestureRecognizer: UIPanGestureRecognizer! | |
weak var delegate: SlideToActionButtonDelegate? | |
private var xEndingPoint: CGFloat { | |
return (bounds.width - handleView.bounds.width) | |
} | |
private var isFinished = false | |
init() { | |
super.init(frame: .zero) | |
setup() | |
} | |
required init?(coder: NSCoder) { | |
super.init(coder: coder) | |
setup() | |
} | |
func setup() { | |
backgroundColor = Colors.background | |
layer.cornerRadius = 12 | |
addSubview(titleLabel) | |
addSubview(draggedView) | |
addSubview(handleView) | |
handleView.addSubview(handleViewImage) | |
//MARK: - Constraints | |
leadingThumbnailViewConstraint = handleView.leadingAnchor.constraint(equalTo: leadingAnchor) | |
NSLayoutConstraint.activate([ | |
leadingThumbnailViewConstraint!, | |
handleView.topAnchor.constraint(equalTo: topAnchor), | |
handleView.bottomAnchor.constraint(equalTo: bottomAnchor), | |
handleView.widthAnchor.constraint(equalToConstant: 80), | |
draggedView.topAnchor.constraint(equalTo: topAnchor), | |
draggedView.bottomAnchor.constraint(equalTo: bottomAnchor), | |
draggedView.leadingAnchor.constraint(equalTo: leadingAnchor), | |
draggedView.trailingAnchor.constraint(equalTo: handleView.trailingAnchor), | |
handleViewImage.topAnchor.constraint(equalTo: handleView.topAnchor, constant: 10), | |
handleViewImage.bottomAnchor.constraint(equalTo: handleView.bottomAnchor, constant: -10), | |
handleViewImage.centerXAnchor.constraint(equalTo: handleView.centerXAnchor), | |
titleLabel.leadingAnchor.constraint(equalTo: leadingAnchor), | |
titleLabel.trailingAnchor.constraint(equalTo: trailingAnchor), | |
titleLabel.centerYAnchor.constraint(equalTo: centerYAnchor) | |
]) | |
panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(self.handlePanGesture(_:))) | |
panGestureRecognizer.minimumNumberOfTouches = 1 | |
handleView.addGestureRecognizer(panGestureRecognizer) | |
} | |
@objc private func handlePanGesture(_ sender: UIPanGestureRecognizer) { | |
if isFinished { return } | |
let translatedPoint = sender.translation(in: self).x | |
switch sender.state { | |
case .changed: | |
if translatedPoint <= 0 { | |
updateHandleXPosition(0) | |
} else if translatedPoint >= xEndingPoint { | |
updateHandleXPosition(xEndingPoint) | |
} else { | |
updateHandleXPosition(translatedPoint) | |
} | |
case .ended: | |
if translatedPoint >= xEndingPoint { | |
self.updateHandleXPosition(xEndingPoint) | |
isFinished = true | |
delegate?.didFinish() | |
} else { | |
UIView.animate(withDuration: 1) { | |
self.reset() | |
} | |
} | |
default: | |
break | |
} | |
} | |
private func updateHandleXPosition(_ x: CGFloat) { | |
leadingThumbnailViewConstraint?.constant = x | |
} | |
func reset() { | |
isFinished = false | |
updateHandleXPosition(0) | |
} | |
} |
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