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要實(shí)現(xiàn)一個(gè)自定義的日歷視圖組件,可以使用UICollectionView來(lái)顯示日期,并根據(jù)實(shí)際需求自定義日期的樣式和功能。
以下是一個(gè)簡(jiǎn)單的示例代碼:
import UIKit
class CustomCalendarView: UIView, UICollectionViewDataSource, UICollectionViewDelegate {
private var collectionView: UICollectionView!
private var dates: [Date] = []
override init(frame: CGRect) {
super.init(frame: frame)
setupCollectionView()
setupDates()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func setupCollectionView() {
let layout = UICollectionViewFlowLayout()
layout.itemSize = CGSize(width: frame.width/7, height: frame.width/7)
collectionView = UICollectionView(frame: frame, collectionViewLayout: layout)
collectionView.dataSource = self
collectionView.delegate = self
collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
addSubview(collectionView)
}
private func setupDates() {
// 獲取當(dāng)前月份的所有日期
let currentDate = Date()
let calendar = Calendar.current
let range = calendar.range(of: .day, in: .month, for: currentDate)!
dates = range.compactMap { calendar.date(byAdding: .day, value: $0-1, to: calendar.startOfDay(for: currentDate)) }
collectionView.reloadData()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return dates.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)
let date = dates[indexPath.item]
let formatter = DateFormatter()
formatter.dateFormat = "d"
let label = UILabel(frame: cell.contentView.bounds)
label.textAlignment = .center
label.text = formatter.string(from: date)
cell.contentView.addSubview(label)
// 自定義日期樣式
if calendar.isDateInToday(date) {
cell.backgroundColor = .red
label.textColor = .white
} else {
cell.backgroundColor = .clear
label.textColor = .black
}
return cell
}
}
在使用時(shí),只需要將CustomCalendarView
添加到視圖中即可:
let calendarView = CustomCalendarView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
view.addSubview(calendarView)
這樣就可以實(shí)現(xiàn)一個(gè)簡(jiǎn)單的自定義日歷視圖組件,可以根據(jù)需求進(jìn)一步擴(kuò)展和優(yōu)化。
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