🤔 CalendarViewDeleage를 사용하여 특정 날짜에 대한 데코레이션!

CalendarViewController에서 CalendarViewDelegate를 사용하여 특정 날짜에 대한 데코레이션을 적용하려면, CalendarViewDelegate의 인스턴스를 생성하고 calendarView.delegate로 설정

import UIKit

// Define a calendar view delegate.

class CalendarViewDelegate: NSObject, UICalendarViewDelegate {
    
    var decorations: [Date?: UICalendarView.Decoration] = [:]
    
    override init() {
        super.init()
        setupDecorations()
    }
    
    private func setupDecorations() {
        let calendar = Calendar(identifier: .gregorian)
        
        // 날짜 추가 (생일)
        let specialDates: [(Int, Int, String)] = [
            (3, 17, "🚗"),
            (3, 19, "🚒")
        ]
        
        for (month, day, string) in  specialDates {
            let components = DateComponents(calendar: calendar,
                                            year: 2025,
                                            month: month,
                                            day: day
            )
            
            if let date = components.date {
                let decoration = UICalendarView.Decoration.customView {
                    let label = UILabel(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
                    label.text = string
                    label.textColor = .red
                    label.font = .systemFont(ofSize: 15, weight: .black)
                    return label
                }
                decorations[date] = decoration
            }
        }
    }
    
    func calendarView(_ calendarView: UICalendarView, decorationFor dateComponents: DateComponents) -> UICalendarView.Decoration? {
        let day = DateComponents(
            calendar: dateComponents.calendar,
            year: dateComponents.year,
            month: dateComponents.month,
            day: dateComponents.day
        )
        return decorations[day.date]
    }
}

// MARK: - CalendarViewController
class CalendarViewController: UIViewController {
    
    private let calendarView: UICalendarView = UICalendarView()
    private let calendarDelegate = CalendarViewDelegate()
    
    // MARK: - Life Cycle
    override func viewDidLoad() {
        super.viewDidLoad()
        print("지금 시간: ", Date())
        view.backgroundColor = .white
        
        let gregorianCalendar = Calendar(identifier: .gregorian)
        calendarView.calendar = gregorianCalendar
        calendarView.locale = Locale(identifier: "ko_KR")
        calendarView.fontDesign = .rounded
        
        // 오늘 날짜 대입
        let today = Date()
        let todayComponents = gregorianCalendar.dateComponents([.year, .month, .day], from: today)
        calendarView.visibleDateComponents = todayComponents
        
        // ✅ 커스텀 데코레이션 Delegate 적용
        calendarView.delegate = calendarDelegate
        
        setupUI()
    }
    
    private func setupUI() {
        view.addSubview(calendarView)
        calendarView.translatesAutoresizingMaskIntoConstraints = false
        
        NSLayoutConstraint.activate([
            calendarView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 10),
            calendarView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -10),
            calendarView.topAnchor.constraint(equalTo: view.topAnchor),
            calendarView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -150)
        ])
    }
}

 

✅ 추가된 기능

1. 특정 날짜에 아이콘을 표시
   • UICalendarView.Decoration.image() 사용하여 날짜별 아이콘 지정
   • 예제:
     • 3월 17일 : "🚗"
     • 3월 19일 :"🚒"
2. UICalendarView의 delegate 적용
   • calendarView.delegate = calendarDelegate
3. 추후 날짜 추가 가능
   • setupDecorations() 내에서 특정 날짜 추가 가능