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Improve large image/gallery animation handling when images aren't loaded

This commit is contained in:
Shadowfacts 2020-01-25 22:29:12 -05:00
parent d1913d7e69
commit f2e08e96f3
Signed by untrusted user: shadowfacts
GPG Key ID: 94A5AB95422746E5
8 changed files with 58 additions and 39 deletions
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10
Tusker/Extensions/UIViewController+Delegates.swift
View File

@ -10,20 +10,22 @@ import UIKit
extension UIViewController: UIViewControllerTransitioningDelegate {
public func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
if presented is LargeImageViewController {
if let presented = presented as? LargeImageViewController,
presented.sourceInfo?.image != nil {
return LargeImageExpandAnimationController()
} else if let presented = presented as? GalleryViewController,
presented.sourcesInfo[presented.startIndex] != nil {
presented.sourcesInfo[presented.startIndex]?.image != nil {
return GalleryExpandAnimationController()
}
return nil
}
public func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
if let dismissed = dismissed as? LargeImageViewController {
if let dismissed = dismissed as? LargeImageViewController,
dismissed.imageForDismissalAnimation() != nil {
return LargeImageShrinkAnimationController(interactionController: dismissed.dismissInteractionController)
} else if let dismissed = dismissed as? GalleryViewController,
dismissed.sourcesInfo[dismissed.currentIndex] != nil {
dismissed.imageForDismissalAnimation() != nil {
return GalleryShrinkAnimationController(interactionController: dismissed.dismissInteractionController)
}
return nil

8
Tusker/Screens/Gallery/GalleryViewController.swift
View File

@ -97,6 +97,14 @@ class GalleryViewController: UIPageViewController, UIPageViewControllerDataSourc
}
}
func imageForDismissalAnimation() -> UIImage? {
if let sourceImage = sourcesInfo[currentIndex]?.image {
return sourceImage
} else {
return (pages[currentIndex] as? AttachmentViewController)?.largeImageVC?.image
}
}
// MARK: - Page View Controller Data Source
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {

13
Tusker/Screens/Gallery/Transitions/GalleryExpandAnimationController.swift
View File

@ -20,8 +20,12 @@ class GalleryExpandAnimationController: NSObject, UIViewControllerAnimatedTransi
return
}
let containerView = transitionContext.containerView
containerView.addSubview(toVC.view)
let finalVCFrame = transitionContext.finalFrame(for: toVC)
guard let (image, sourceFrame, sourceCornerRadius) = toVC.sourcesInfo[toVC.startIndex] else {
guard let sourceInfo = toVC.sourcesInfo[toVC.startIndex],
let image = sourceInfo.image else {
toVC.view.frame = finalVCFrame
transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
return
@ -29,8 +33,6 @@ class GalleryExpandAnimationController: NSObject, UIViewControllerAnimatedTransi
let attachment = toVC.attachments[toVC.startIndex]
let containerView = transitionContext.containerView
let ratio = image.size.width / image.size.height
var width = finalVCFrame.width
var height = width / ratio
@ -42,21 +44,20 @@ class GalleryExpandAnimationController: NSObject, UIViewControllerAnimatedTransi
}
let finalFrame = CGRect(x: finalVCFrame.midX - width / 2, y: finalVCFrame.midY - height / 2, width: width, height: height)
let imageView = GIFImageView(frame: sourceFrame)
let imageView = GIFImageView(frame: sourceInfo.frame)
imageView.image = image
if attachment.url.pathExtension == "gif",
let data = ImageCache.attachments.get(attachment.url) {
imageView.animate(withGIFData: data)
}
imageView.contentMode = .scaleAspectFill
imageView.layer.cornerRadius = sourceCornerRadius
imageView.layer.cornerRadius = sourceInfo.cornerRadius
imageView.layer.masksToBounds = true
let blackView = UIView(frame: finalVCFrame)
blackView.backgroundColor = .black
blackView.alpha = 0
containerView.addSubview(toVC.view)
containerView.addSubview(blackView)
containerView.addSubview(imageView)

7
Tusker/Screens/Gallery/Transitions/GalleryShrinkAnimationController.swift
View File

@ -26,7 +26,8 @@ class GalleryShrinkAnimationController: NSObject, UIViewControllerAnimatedTransi
return
}
guard let (image, sourceFrame, sourceCornerRadius) = fromVC.sourcesInfo[fromVC.currentIndex] else {
guard let sourceInfo = fromVC.sourcesInfo[fromVC.currentIndex],
let image = fromVC.imageForDismissalAnimation() else {
transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
return
}
@ -66,8 +67,8 @@ class GalleryShrinkAnimationController: NSObject, UIViewControllerAnimatedTransi
let duration = transitionDuration(using: transitionContext)
UIView.animate(withDuration: duration, animations: {
imageView.frame = sourceFrame
imageView.layer.cornerRadius = sourceCornerRadius
imageView.frame = sourceInfo.frame
imageView.layer.cornerRadius = sourceInfo.cornerRadius
blackView.alpha = 0
}, completion: { _ in
blackView.removeFromSuperview()

6
Tusker/Screens/Large Image/LargeImageViewController.swift
View File

@ -13,7 +13,7 @@ import Gifu
class LargeImageViewController: UIViewController, UIScrollViewDelegate {
typealias SourceInfo = (image: UIImage, frame: CGRect, cornerRadius: CGFloat)
typealias SourceInfo = (image: UIImage?, frame: CGRect, cornerRadius: CGFloat)
var sourceInfo: SourceInfo?
var dismissInteractionController: LargeImageInteractionController?
@ -133,6 +133,10 @@ class LargeImageViewController: UIViewController, UIScrollViewDelegate {
}
}
func imageForDismissalAnimation() -> UIImage? {
return sourceInfo?.image ?? image
}
func setControlsVisible(_ controlsVisible: Bool, animated: Bool) {
self.controlsVisible = controlsVisible
if animated {

14
Tusker/Screens/Large Image/Transitions/LargeImageExpandAnimationController.swift
View File

@ -21,33 +21,35 @@ class LargeImageExpandAnimationController: NSObject, UIViewControllerAnimatedTra
return
}
let containerView = transitionContext.containerView
containerView.addSubview(toVC.view)
let finalVCFrame = transitionContext.finalFrame(for: toVC)
guard let (image, originFrame, originCornerRadius) = toVC.sourceInfo else {
guard let sourceInfo = toVC.sourceInfo,
let image = sourceInfo.image else {
toVC.view.frame = finalVCFrame
transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
return
}
let containerView = transitionContext.containerView
let ratio = image.size.width / image.size.height
let width = finalVCFrame.width
let height = width / ratio
let finalFrame = CGRect(x: finalVCFrame.midX - width / 2, y: finalVCFrame.midY - height / 2, width: width, height: height)
let imageView = GIFImageView(frame: originFrame)
imageView.image = toVC.imageView.image!
let imageView = GIFImageView(frame: sourceInfo.frame)
imageView.image = image
if let gifData = toVC.gifData {
imageView.animate(withGIFData: gifData)
}
imageView.contentMode = .scaleAspectFill
imageView.layer.cornerRadius = originCornerRadius
imageView.layer.cornerRadius = sourceInfo.cornerRadius
imageView.layer.masksToBounds = true
let blackView = UIView(frame: finalVCFrame)
blackView.backgroundColor = .black
blackView.alpha = 0
containerView.addSubview(toVC.view)
containerView.addSubview(blackView)
containerView.addSubview(imageView)

7
Tusker/Screens/Large Image/Transitions/LargeImageShrinkAnimationController.swift
View File

@ -27,7 +27,8 @@ class LargeImageShrinkAnimationController: NSObject, UIViewControllerAnimatedTra
return
}
guard let (image, finalFrame, finalCornerRadius) = fromVC.sourceInfo else {
guard let sourceInfo = fromVC.sourceInfo,
let image = fromVC.imageForDismissalAnimation() else {
transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
return
}
@ -59,8 +60,8 @@ class LargeImageShrinkAnimationController: NSObject, UIViewControllerAnimatedTra
let duration = transitionDuration(using: transitionContext)
UIView.animate(withDuration: duration, animations: {
imageView.frame = finalFrame
imageView.layer.cornerRadius = finalCornerRadius
imageView.frame = sourceInfo.frame
imageView.layer.cornerRadius = sourceInfo.cornerRadius
blackView.alpha = 0
}, completion: { _ in
blackView.removeFromSuperview()

4
Tusker/TuskerNavigationDelegate.swift
View File

@ -148,7 +148,7 @@ extension TuskerNavigationDelegate where Self: UIViewController {
}
private func sourceViewInfo(_ sourceView: UIImageView?) -> LargeImageViewController.SourceInfo? {
guard let sourceView = sourceView, let image = sourceView.image else { return nil }
guard let sourceView = sourceView else { return nil }
var sourceFrame = sourceView.convert(sourceView.bounds, to: view)
if let scrollView = view as? UIScrollView {
@ -159,7 +159,7 @@ extension TuskerNavigationDelegate where Self: UIViewController {
let y = sourceFrame.minY * scale - scrollView.contentOffset.y + scrollView.frame.minY
sourceFrame = CGRect(x: x, y: y, width: width, height: height)
}
return (image: image, frame: sourceFrame, cornerRadius: sourceView.layer.cornerRadius)
return (image: sourceView.image, frame: sourceFrame, cornerRadius: sourceView.layer.cornerRadius)
}
func largeImage(_ image: UIImage, description: String?, sourceView: UIImageView) -> LargeImageViewController {