Shin Yamamoto
56e71ac580
* Fix #628 * Add a new sample to test UICollectionView using a compositional layout
65 lines
2.2 KiB
Swift
65 lines
2.2 KiB
Swift
// Copyright 2018-Present Shin Yamamoto. All rights reserved. MIT license.
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import UIKit
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import FloatingPanel
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final class ImageViewController: UIViewController {
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class PanelLayout: FloatingPanelLayout {
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private unowned var targetGuide: UILayoutGuide
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init(targetGuide: UILayoutGuide) {
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self.targetGuide = targetGuide
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}
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let position: FloatingPanelPosition = .bottom
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let initialState: FloatingPanelState = .full
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var anchors: [FloatingPanelState : FloatingPanelLayoutAnchoring] {
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return [
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.full: FloatingPanelAdaptiveLayoutAnchor(
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absoluteOffset: 0,
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contentLayout: targetGuide,
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referenceGuide: .superview
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),
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.half: FloatingPanelAdaptiveLayoutAnchor(
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fractionalOffset: 0.5,
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contentLayout: targetGuide,
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referenceGuide: .superview
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)
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]
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}
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}
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@IBOutlet weak var headerView: UIView!
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@IBOutlet weak var footerView: UIView!
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@IBOutlet weak var scrollView: UIScrollView!
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@IBOutlet weak var stackView: UIStackView!
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enum Mode {
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case onlyImage
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case withHeaderFooter
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}
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func layoutGuideFor(mode: Mode) -> UILayoutGuide {
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switch mode {
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case .onlyImage:
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self.headerView.isHidden = true
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self.footerView.isHidden = true
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return scrollView.contentLayoutGuide
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case .withHeaderFooter:
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self.headerView.isHidden = false
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self.footerView.isHidden = false
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let guide = UILayoutGuide()
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view.addLayoutGuide(guide)
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NSLayoutConstraint.activate([
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scrollView.heightAnchor.constraint(equalTo: scrollView.contentLayoutGuide.heightAnchor),
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guide.topAnchor.constraint(equalTo: stackView.topAnchor),
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guide.leftAnchor.constraint(equalTo: stackView.leftAnchor),
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guide.bottomAnchor.constraint(equalTo: stackView.bottomAnchor),
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guide.rightAnchor.constraint(equalTo: stackView.rightAnchor),
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])
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return guide
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}
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}
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}
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