NetNewsWire/Multiplatform/iOS/Article/ImageViewController.swift

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2.7 KiB
Swift
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//
// ImageViewController.swift
// Multiplatform iOS
//
// Created by Maurice Parker on 7/6/20.
// Copyright © 2020 Ranchero Software. All rights reserved.
//
import UIKit
class ImageViewController: UIViewController {
@IBOutlet weak var closeButton: UIButton!
@IBOutlet weak var shareButton: UIButton!
@IBOutlet weak var imageScrollView: ImageScrollView!
@IBOutlet weak var titleLabel: UILabel!
@IBOutlet weak var titleBackground: UIVisualEffectView!
@IBOutlet weak var titleLeading: NSLayoutConstraint!
@IBOutlet weak var titleTrailing: NSLayoutConstraint!
var image: UIImage!
var imageTitle: String?
var zoomedFrame: CGRect {
return imageScrollView.zoomedFrame
}
override func viewDidLoad() {
super.viewDidLoad()
closeButton.imageView?.contentMode = .scaleAspectFit
closeButton.accessibilityLabel = NSLocalizedString("Close", comment: "Close")
shareButton.accessibilityLabel = NSLocalizedString("Share", comment: "Share")
imageScrollView.setup()
imageScrollView.imageScrollViewDelegate = self
imageScrollView.imageContentMode = .aspectFit
imageScrollView.initialOffset = .center
imageScrollView.display(image: image)
titleLabel.text = imageTitle ?? ""
layoutTitleLabel()
guard imageTitle != "" else {
titleBackground.removeFromSuperview()
return
}
titleBackground.layer.cornerRadius = 6
}
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
coordinator.animate(alongsideTransition: { [weak self] context in
self?.imageScrollView.resize()
})
}
@IBAction func share(_ sender: Any) {
guard let image = image else { return }
let activityViewController = UIActivityViewController(activityItems: [image], applicationActivities: nil)
activityViewController.popoverPresentationController?.sourceView = shareButton
activityViewController.popoverPresentationController?.sourceRect = shareButton.bounds
present(activityViewController, animated: true)
}
@IBAction func done(_ sender: Any) {
dismiss(animated: true)
}
private func layoutTitleLabel(){
let width = view.frame.width
let multiplier = UIDevice.current.userInterfaceIdiom == .pad ? CGFloat(0.1) : CGFloat(0.04)
titleLeading.constant += width * multiplier
titleTrailing.constant -= width * multiplier
titleLabel.layoutIfNeeded()
}
}
// MARK: ImageScrollViewDelegate
extension ImageViewController: ImageScrollViewDelegate {
func imageScrollViewDidGestureSwipeUp(imageScrollView: ImageScrollView) {
dismiss(animated: true)
}
func imageScrollViewDidGestureSwipeDown(imageScrollView: ImageScrollView) {
dismiss(animated: true)
}
}