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Update VisibleRatioCalculator calculating logic #17
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| // | ||
| // MatrixViewController.swift | ||
| // SushiBelt_Example | ||
| // | ||
| // Created by david on 5/16/24. | ||
| // Copyright © 2024 CocoaPods. All rights reserved. | ||
| // | ||
|
|
||
| import UIKit | ||
|
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| import SushiBelt | ||
|
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| fileprivate final class MatrixCell: UICollectionViewCell { | ||
|
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| static let identifier = "MatrixCell" | ||
|
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| private let imageView = UIImageView() | ||
|
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| override init(frame: CGRect) { | ||
| super.init(frame: frame) | ||
| self.contentView.addSubview(self.imageView) | ||
| self.contentView.backgroundColor = UIColor(red: 1.0, green: 0.83, blue: 0.47, alpha: 1.0) | ||
| } | ||
|
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| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
|
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| override func prepareForReuse() { | ||
| super.prepareForReuse() | ||
| self.imageView.image = nil | ||
| } | ||
|
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| override func layoutSubviews() { | ||
| super.layoutSubviews() | ||
| self.imageView.frame.size = CGSize(width: 200.0, height: 200.0) | ||
| self.imageView.center = self.contentView.center | ||
| self.contentView.layer.cornerRadius = 24.0 | ||
| } | ||
|
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| func configure(sushi: Sushi) { | ||
| self.imageView.image = sushi.image | ||
| } | ||
| } | ||
|
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| class MatrixViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate { | ||
|
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| var collectionView: UICollectionView! | ||
| private let tracker = SushiBeltTracker() | ||
| private let debugger = SushiBeltDebugger.shared | ||
| private let sections: [[Sushi]] = [ | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10), | ||
| Sushi.いらっしゃいませ(count: 10) | ||
| ] | ||
|
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| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
| let layout = UICollectionViewCompositionalLayout { (sectionIndex, _) -> NSCollectionLayoutSection? in | ||
| let itemSize = NSCollectionLayoutSize(widthDimension: .absolute(300), heightDimension: .absolute(300)) | ||
| let item = NSCollectionLayoutItem(layoutSize: itemSize) | ||
| item.contentInsets = .init(top: 20, leading: 20, bottom: 20, trailing: 20) | ||
| let groupSize = NSCollectionLayoutSize(widthDimension: .absolute(300 * 10), heightDimension: .absolute(300)) | ||
| let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitem: item, count: 10) | ||
| let section = NSCollectionLayoutSection(group: group) | ||
| return section | ||
| } | ||
|
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| collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout) | ||
| collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight] | ||
| collectionView.backgroundColor = .white | ||
| collectionView.dataSource = self | ||
| collectionView.delegate = self | ||
| collectionView.register(MatrixCell.self, forCellWithReuseIdentifier: MatrixCell.identifier) | ||
| view.addSubview(collectionView) | ||
| self.tracker.delegate = self | ||
| self.tracker.dataSource = self | ||
| self.tracker.scrollContext = SushiBeltTrackerUIScrollContext(scrollView: self.collectionView) | ||
| self.tracker.registerDebugger(debugger: self.debugger) | ||
| self.debugger.show() | ||
| } | ||
|
|
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| override func viewDidAppear(_ animated: Bool) { | ||
| super.viewDidAppear(animated) | ||
| trackingVisibleCellsIfNeeded() | ||
| } | ||
|
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| override func viewDidDisappear(_ animated: Bool) { | ||
| super.viewDidDisappear(animated) | ||
| tracker.calculateItemsIfNeeded(items: []) | ||
| } | ||
|
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| func numberOfSections(in collectionView: UICollectionView) -> Int { | ||
| return sections.count | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { | ||
| return sections[section].count | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { | ||
| guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: MatrixCell.identifier, for: indexPath) as? MatrixCell else { | ||
| return .init() | ||
| } | ||
|
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| let section = sections[indexPath.section] | ||
| let item = section[indexPath.item] | ||
| cell.configure(sushi: item) | ||
| return cell | ||
| } | ||
|
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| func scrollViewDidScroll(_ scrollView: UIScrollView) { | ||
| trackingVisibleCellsIfNeeded() | ||
| } | ||
|
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| private func trackingVisibleCellsIfNeeded() { | ||
| let trackingItems = self.collectionView.visibleCells.compactMap { cell -> SushiBeltTrackerItem? in | ||
| guard let indexPath = self.collectionView.indexPath(for: cell) else { return nil } | ||
|
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| return SushiBeltTrackerItem( | ||
| id: .indexPath(indexPath), | ||
| rect: cell.sushiBeltTrackerItemRect() | ||
| ) | ||
| } | ||
| self.tracker.calculateItemsIfNeeded(items: trackingItems) | ||
| } | ||
| } | ||
|
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| extension MatrixViewController: SushiBeltTrackerDataSource { | ||
|
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| func trackingRect(_ tracker: SushiBeltTracker) -> CGRect { | ||
| collectionView.frame | ||
| } | ||
|
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| func visibleRatioForItem(_ tracker: SushiBeltTracker, item: SushiBeltTrackerItem) -> CGFloat { | ||
| guard case let .indexPath(indexPath) = item.id else { return 0.0 } | ||
| return sections[indexPath.section][indexPath.item].kind.visibleRatio | ||
| } | ||
| } | ||
|
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| extension MatrixViewController: SushiBeltTrackerDelegate { | ||
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| func willBeginTracking(_ tracker: SushiBeltTracker, item: SushiBeltTrackerItem) { | ||
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| print("🚀 begin tracking: \(item.debugDescription)") | ||
| } | ||
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| func didTrack(_ tracker: SushiBeltTracker, item: SushiBeltTrackerItem) { | ||
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| print("🎯 tracked: \(item.debugDescription)") | ||
| } | ||
|
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| func didEndTracking(_ tracker: SushiBeltTracker, item: SushiBeltTrackerItem) { | ||
|
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| print("👋 end tracking: \(item.debugDescription)") | ||
| } | ||
| } | ||
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すごいですね 😂