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Merge pull request #78 from boostcampwm-2022/feature/CalendarView
Feature/calendar view
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DailyQuest/DailyQuest/Presentation/Common/CalendarView.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,227 @@ | ||
| // | ||
| // CalendarView.swift | ||
| // DailyQuest | ||
| // | ||
| // Created by wickedRun on 2022/11/15. | ||
| // | ||
|
|
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| import UIKit | ||
| import SnapKit | ||
|
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| class CalendarView: UIView { | ||
|
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| lazy var yearMonthLabel: UILabel = { | ||
| let view = UILabel() | ||
| view.adjustsFontSizeToFitWidth = true | ||
| view.font = .systemFont(ofSize: 32, weight: .bold) | ||
| view.text = dateFormatter.string(from: currentDay) | ||
| return view | ||
| }() | ||
|
|
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| lazy var weekdayLabels: UIStackView = { | ||
| let view = UIStackView() | ||
| view.axis = .horizontal | ||
| view.distribution = .fillEqually | ||
| var calendar = Calendar.current | ||
| calendar.locale = .init(identifier: "ko_KR") | ||
|
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| calendar.shortWeekdaySymbols.forEach { | ||
| let label = UILabel() | ||
| label.adjustsFontSizeToFitWidth = true | ||
| label.text = $0 | ||
| label.textAlignment = .center | ||
| view.addArrangedSubview(label) | ||
| } | ||
|
|
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| return view | ||
| }() | ||
|
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| lazy var monthCollectionView: UICollectionView = { | ||
| let layout = setupCollectionViewLayout() | ||
| let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout) | ||
| collectionView.showsHorizontalScrollIndicator = false | ||
| collectionView.showsVerticalScrollIndicator = false | ||
| collectionView.bounces = false | ||
| collectionView.isPagingEnabled = true | ||
| collectionView.register(CalendarCell.self, forCellWithReuseIdentifier: CalendarCell.reuseIdentifier) | ||
| collectionView.delegate = self | ||
| return collectionView | ||
| }() | ||
|
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| private let dateFormatter = { | ||
| let formatter = DateFormatter() | ||
| formatter.dateFormat = "yyyy년 MM월" | ||
| return formatter | ||
| }() | ||
|
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| private var currentDay: Date { | ||
| didSet { | ||
| yearMonthLabel.text = dateFormatter.string(from: currentDay) | ||
| } | ||
| } | ||
|
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| var dataSource: UICollectionViewDiffableDataSource<Int, DisplayDate>! | ||
|
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| var itemsBySection: [[CalendarView.DisplayDate]] = [[], [], []] | ||
|
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| override init(frame: CGRect = .zero) { | ||
| self.currentDay = Date.now | ||
|
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| super.init(frame: frame) | ||
| self.itemsBySection = self.setupMonths() | ||
|
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| addSubviews() | ||
| setupConstraints() | ||
| setupDataSource() | ||
| } | ||
|
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| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
|
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| override func draw(_ rect: CGRect) { | ||
| super.draw(rect) | ||
|
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| monthCollectionView.scrollToItem(at: IndexPath(item: 0, section: 1), at: .centeredHorizontally, animated: false) | ||
| } | ||
|
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| private func addSubviews() { | ||
| addSubview(yearMonthLabel) | ||
| addSubview(weekdayLabels) | ||
| addSubview(monthCollectionView) | ||
| } | ||
|
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| private func setupConstraints() { | ||
| yearMonthLabel.snp.makeConstraints { make in | ||
| make.top.equalToSuperview().inset(5) | ||
| make.horizontalEdges.equalToSuperview().inset(20) | ||
| } | ||
|
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| weekdayLabels.snp.makeConstraints { make in | ||
| make.top.equalTo(yearMonthLabel.snp.bottom).offset(10) | ||
| make.horizontalEdges.equalToSuperview().inset(5) | ||
| } | ||
|
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| monthCollectionView.snp.makeConstraints { make in | ||
| make.top.equalTo(weekdayLabels.snp.bottom).offset(10) | ||
| make.bottom.horizontalEdges.equalToSuperview().inset(5) | ||
| } | ||
| } | ||
|
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| private func setupCollectionViewLayout() -> UICollectionViewLayout { | ||
| let itemWidth: CGFloat = 1 / 7 | ||
| let groupHeight: CGFloat = 1 / 6 | ||
|
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| let itemSize = NSCollectionLayoutSize( | ||
| widthDimension: .fractionalWidth(itemWidth), | ||
| heightDimension: .fractionalHeight(1) | ||
| ) | ||
| let item = NSCollectionLayoutItem(layoutSize: itemSize) | ||
|
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| let groupSize = NSCollectionLayoutSize( | ||
| widthDimension: .fractionalWidth(1), | ||
| heightDimension: .fractionalHeight(groupHeight) | ||
| ) | ||
| let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, repeatingSubitem: item, count: 7) | ||
|
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| let section = NSCollectionLayoutSection(group: group) | ||
| section.orthogonalScrollingBehavior = .groupPaging | ||
|
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| let configuration = UICollectionViewCompositionalLayoutConfiguration() | ||
| configuration.scrollDirection = .horizontal | ||
|
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| let layout = UICollectionViewCompositionalLayout(section: section, configuration: configuration) | ||
|
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| return layout | ||
| } | ||
|
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| private func setupDataSource() { | ||
| self.dataSource = UICollectionViewDiffableDataSource(collectionView: monthCollectionView) { collectionView, indexPath, item in | ||
| guard | ||
| let cell = collectionView.dequeueReusableCell(withReuseIdentifier: CalendarCell.reuseIdentifier, for: indexPath) as? CalendarCell | ||
| else { | ||
| preconditionFailure() | ||
| } | ||
|
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| cell.configure(state: item.state, day: item.date.day) | ||
|
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| return cell | ||
| } | ||
|
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| var snapshot = NSDiffableDataSourceSnapshot<Int, DisplayDate>() | ||
| itemsBySection.indices.forEach { index in | ||
| snapshot.appendSections([index]) | ||
| snapshot.appendItems(itemsBySection[index], toSection: index) | ||
| } | ||
| dataSource.apply(snapshot) | ||
| } | ||
|
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| private func applySnapshot() { | ||
| var snapshot = NSDiffableDataSourceSnapshot<Int, DisplayDate>() | ||
| let allSectionIndex = itemsBySection.indices.map { Int($0) } | ||
| snapshot.appendSections(allSectionIndex) | ||
| allSectionIndex.forEach { index in | ||
| snapshot.appendItems(itemsBySection[index], toSection: index) | ||
| } | ||
| dataSource.apply(snapshot, animatingDifferences: false) | ||
| } | ||
| } | ||
|
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| extension CalendarView: UICollectionViewDelegate { | ||
|
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| func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) { | ||
| guard let indexPath = monthCollectionView.indexPathsForVisibleItems.first else { | ||
| return | ||
| } | ||
|
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| if indexPath.section > 1 { | ||
| nextMonth() | ||
| } else if indexPath.section < 1 { | ||
| lastMonth() | ||
| } else { | ||
| return | ||
| } | ||
|
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| applySnapshot() | ||
| monthCollectionView.scrollToItem(at: IndexPath(item: 0, section: 1), at: .centeredHorizontally, animated: false) | ||
| } | ||
|
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| private func fetchDisplayDaysOfMonth(for date: Date?) -> [DisplayDate] { | ||
| guard let date else { return [] } | ||
|
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| return date.rangeFromStartWeekdayOfLastMonthToEndDayOfCurrentMonth.map { DisplayDate(date: $0, state: .none) } + date.rangeDaysOfMonth.map { DisplayDate(date: $0, state: .normal) } | ||
| } | ||
|
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| private func setupMonths() -> [[DisplayDate]] { | ||
| let startDayOfPrevMonth = currentDay.startDayOfLastMonth | ||
| let startDayOfNextMonth = currentDay.startDayOfNextMonth | ||
|
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| return [startDayOfPrevMonth, currentDay, startDayOfNextMonth].map(fetchDisplayDaysOfMonth(for:)) | ||
| } | ||
|
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| private func nextMonth() { | ||
| currentDay = currentDay.nextMonthOfCurrentDay! | ||
| let monthAfterNext = currentDay.nextMonthOfCurrentDay! | ||
| let monthAfterNextDisplayDays = fetchDisplayDaysOfMonth(for: monthAfterNext) | ||
|
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| self.itemsBySection.removeFirst() | ||
| self.itemsBySection.append(monthAfterNextDisplayDays) | ||
| } | ||
|
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| private func lastMonth() { | ||
| currentDay = currentDay.lastMonthOfCurrentDay! | ||
| let monthBeforeLast = currentDay.lastMonthOfCurrentDay! | ||
| let monthBeforeLastDisplayDays = fetchDisplayDaysOfMonth(for: monthBeforeLast) | ||
|
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| self.itemsBySection.removeLast() | ||
| self.itemsBySection.insert(monthBeforeLastDisplayDays, at: 0) | ||
| } | ||
| } | ||
|
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| extension CalendarView { | ||
|
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| struct DisplayDate: Hashable { | ||
| let date: Date | ||
| let state: CalendarCell.State | ||
| } | ||
| } |
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