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Tweaks for transparent content views

This commit is contained in:
Shadowfacts 2019-09-24 23:08:20 -04:00
parent 36a63e1e23
commit df65b785ef
Signed by: shadowfacts
GPG Key ID: 94A5AB95422746E5
4 changed files with 35 additions and 13 deletions
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6
SheetImagePicker/SheetContainerDismissAnimationController.swift
View File

@ -22,7 +22,8 @@ class SheetContainerDismissAnimationController: NSObject, UIViewControllerAnimat
fromVC.view.alpha = 1.0
fromVC.dimmingView.isHidden = true
let dimmingView = UIView(frame: fromVC.view.frame)
// match the frame to the original dimming view's frame so that it doesn't go under the content
let dimmingView = UIView(frame: fromVC.dimmingView.bounds)
dimmingView.backgroundColor = fromVC.dimmingView.backgroundColor
dimmingView.alpha = fromVC.dimmingView.alpha
@ -32,8 +33,9 @@ class SheetContainerDismissAnimationController: NSObject, UIViewControllerAnimat
let duration = transitionDuration(using: transitionContext)
UIView.animate(withDuration: duration, animations: {
dimmingView.frame = container.bounds
dimmingView.alpha = 0
fromVC.view.transform = CGAffineTransform(translationX: 0, y: fromVC.view.bounds.height)
fromVC.view.transform = CGAffineTransform(translationX: 0, y: fromVC.content.view.bounds.height)
}, completion: { (finished) in
dimmingView.removeFromSuperview()

5
SheetImagePicker/SheetContainerPresentationAnimationController.swift
View File

@ -31,10 +31,13 @@ class SheetContainerPresentationAnimationController: NSObject, UIViewControllerA
container.addSubview(dimmingView)
container.addSubview(toVC.view)
toVC.view.transform = CGAffineTransform(translationX: 0, y: toVC.view.bounds.height)
toVC.view.transform = CGAffineTransform(translationX: 0, y: toVC.initialConstant)
let duration = transitionDuration(using: transitionContext)
UIView.animate(withDuration: duration, animations: {
// we animate the dimming view's frame so that it doesn't go under the content view, in case there's a transparent background
// we also extend the dimming view under any rounded corners the content view has
dimmingView.frame = CGRect(x: 0, y: 0, width: dimmingView.bounds.width, height: toVC.initialConstant + toVC.content.view.layer.cornerRadius)
dimmingView.alpha = toVC.dimmingView.alpha
toVC.view.transform = .identity
}, completion: { (finished) in

16
SheetImagePicker/SheetContainerViewController.swift
View File

@ -66,22 +66,22 @@ public class SheetContainerViewController: UIViewController {
dimmingView.backgroundColor = .black
dimmingView.alpha = (maximumDimmingAlpha - minimumDimmingAlpha) / 2
view.addSubview(dimmingView)
NSLayoutConstraint.activate([
dimmingView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
dimmingView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
dimmingView.topAnchor.constraint(equalTo: view.topAnchor),
dimmingView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
])
addChild(content)
content.didMove(toParent: self)
view.addSubview(content.view)
topConstraint = content.view.topAnchor.constraint(equalTo: view.topAnchor, constant: initialConstant)
NSLayoutConstraint.activate([
content.view.leadingAnchor.constraint(equalTo: view.leadingAnchor),
content.view.trailingAnchor.constraint(equalTo: view.trailingAnchor),
topConstraint,
content.view.bottomAnchor.constraint(equalTo: view.bottomAnchor)
content.view.bottomAnchor.constraint(equalTo: view.bottomAnchor),
dimmingView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
dimmingView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
dimmingView.topAnchor.constraint(equalTo: view.topAnchor),
// we add the content's corner radius here, so that the dimming view extends under the transparent parts of the content view's rounded corners
dimmingView.bottomAnchor.constraint(equalTo: content.view.topAnchor, constant: content.view.layer.cornerRadius)
])
let panGesture = UIPanGestureRecognizer(target: self, action: #selector(panGestureRecognized(_:)))

21
SheetImagePickerTest/ViewController.swift
View File

@ -20,9 +20,26 @@ class ViewController: UIViewController {
@IBAction func buttonPressed(_ sender: Any) {
let content = UIViewController()
content.view.translatesAutoresizingMaskIntoConstraints = false
content.view.backgroundColor = .red
content.view.layer.masksToBounds = true
content.view.layer.cornerRadius = view.bounds.width * 0.05
content.view.layer.cornerRadius = view.bounds.width * 0.02
let blurEffect = UIBlurEffect(style: .systemChromeMaterial)
let blurView = UIVisualEffectView(effect: blurEffect)
blurView.translatesAutoresizingMaskIntoConstraints = false
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.text = "Hello, sheet!"
blurView.contentView.addSubview(label)
content.view.addSubview(blurView)
NSLayoutConstraint.activate([
content.view.leadingAnchor.constraint(equalTo: blurView.contentView.leadingAnchor),
content.view.trailingAnchor.constraint(equalTo: blurView.contentView.trailingAnchor),
content.view.topAnchor.constraint(equalTo: blurView.contentView.topAnchor),
content.view.bottomAnchor.constraint(equalTo: blurView.contentView.bottomAnchor),
label.centerXAnchor.constraint(equalTo: blurView.contentView.centerXAnchor),
label.centerYAnchor.constraint(equalTo: blurView.contentView.centerYAnchor)
])
let sheet = SheetContainerViewController(content: content)
sheet.delegate = self
sheet.detents = [.bottom, .middle, .top]