Cool pop ups assembled using interface builder and minimal code.
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final class ViewController: UIViewController {
private let sheet = Sheet(animation: .slideLeft)
@objc
func tapGestureRecognized(_ sender: UITapGestureRecognizer) {
let storyboard = UIStoryboard(name: "WelcomeSheet", bundle: nil)
let viewController = storyboard.instantiateInitialViewController()!
sheet.show(viewController, above: self)
}
}To handle touch events outside of the action sheett.
sheet.chromeTapped = { [unowned self] in
self.dismiss(animated: true)
}To handle dismiss at the end of the workflow, set up an observer at the beginning and post a notification at the end.
extension Notification.Name {
static let dismiss = Notification.Name(rawValue: "Dismiss")
}
NotificationCenter.default.addObserver(
forName: .dismiss,
object: nil,
queue: nil) { [weak self] _ in
self?.dismiss(animated: true)
}This will also give you the opportunity to dismiss from other locations, should you deem it necessary.
func applicationDidEnterBackground(_ application: UIApplication) {
NotificationCenter.default.post(
name: .dismiss,
object: self,
userInfo: [dismissSheetAnimatedKey : false]
)
}Responding to size class changes or dynamic type is the responsibility of your view controllers.
final class CompleteSheetViewController: UIViewController {
@IBOutlet weak var iconImageView: UIImageView!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
iconImageView.isHidden = (traitCollection.verticalSizeClass == .compact)
}
override var prefersHomeIndicatorAutoHidden: Bool {
return true
}
override func willTransition(to newCollection: UITraitCollection, with coordinator: UIViewControllerTransitionCoordinator) {
super.willTransition(to: newCollection, with: coordinator)
iconImageView.isHidden = (newCollection.verticalSizeClass == .compact)
coordinator.animate(alongsideTransition: { [unowned self] _ in
self.view.layoutIfNeeded()
}, completion: nil)
}
}If your view controller workflow uses func show(_ vc: UIViewContoller, sender: Any?), then you're good to go.
@IBAction func startButtonPressed(_ sender: UIButton) {
let viewController = UIStoryboard(name: "CompleteSheet", bundle: nil).instantiateInitialViewController()!
show(viewController, sender: self)
}If you would like to use custom transition animations, instantiate Sheet with .custom and sublcass StoryboardSegue.
final class FlipFromLeftSegue: StoryboardSegue {
override func executeTransition(_ completion: @escaping () -> Void) {
UIView.transition(
from: source.view!,
to: destination.view!,
duration: 0.3,
options: [.transitionFlipFromLeft]) { (_) in
completion()
}
}
}
final class DropSegue: StoryboardSegue {
override func executeTransition(_ completion: @escaping () -> Void) {
destination.view.layoutIfNeeded()
destination.view.transform = CGAffineTransform(translationX: 0, y: destination.view.bounds.height)
let height = source.view.bounds.height
UIView.animate(withDuration: 0.3, animations: {
self.source.view.transform = CGAffineTransform(translationX: 0, y: height)
self.destination.view.transform = CGAffineTransform.identity
}) { _ in
completion()
}
}
}