Events Calendar is a light-weight iOS Swift library that helps you easily create customizable Calendar UI with events mapping. It supports both sync and async events loading. It is very light and optimized that it allows to achieve ~60 fps rendering easily. Achieves smooth scrolling and takes less memory. The attributes of calendar UI are completely customizable.
CalendarView is available in both Week format and Month format. Usage of both the format is similar. Initialize a MonthCalendarView by:
lazy var monthCalendarView = {
let view = MonthCalendarView(
startDate: Date(fromFormattedString: "2000 01 01")!,
endDate: Date(fromFormattedString: "2050 12 01")!
)
view.allowsDateSelection = true // default value: true
view.selectedDate = Date()
view.isPagingEnabled = true // default value: true
view.scrollDirection = .horizontal // default value: .horizontal
view.viewConfiguration = CalendarConfig() // default valut: .default
return view
}()WeekCalendarView can be initialized the same way.
The UI of the calendar is determined by CalendarConfig object, which is passed to viewConfiguration property of CalendarView. CalendarConfig consists of more than 25 customizable properties. The properties are:
backgroundColor: UIColor // background color of calendar
selectionColor: UIColor // selected date background color
dotColor: UIColor // event dot color
selectedDotColor: UIColor // event dot color of selected date
weekendLabelColor: UIColor // weekend date text color
validLabelColor: UIColor // valid date text color
invalidLabelColor: UIColor // invalid date text color
selectedLabelColor: UIColor // selected date text color
todayLabelColor: UIColor // today date text color
otherMonthLabelColor: UIColor // other month date text color
dateLabelFont: UIFont // font of date text
cellMaxWidth: CGFloat? // maximum width of each date cell
cellMaxHeight: CGFloat? // maximum height of each date cell
invalidatePastDates: Bool // shows past dates invalid date and unselectable
shouldConsiderSaturdayAsWeekend: Bool // considers saturday as weekend
monthTitleFont: UIFont // month title text font
monthTitleHeight: CGFloat // month title text height
monthTitleTextColor: UIColor // month title text color
monthTitleAlignment: NSTextAlignment // month title text alignment
monthTitleBackgroundColor: UIColor // month title background color
monthTitleStyle: MonthTitleStyle // month title style (short, full, ...)
monthTitleIncludesYear: Bool // displays year along with month title
weekdayTitles: [String] // week day titles
weekdayTitleFont: UIFont // week day title text font
weekdayTitleColor: UIColor // week day title text color
weekdayTitleHeight: CGFloat // week day title height
weekdayTitlesBackgroundColor: UIColor // week day title background colorCallbacks from CalendarView are called to delegate. Conform your object to CalendarViewDelegate and assign to delegate property of CalendarView
monthCalendarView.delegate = self // self should conform to CalendarViewDelegate
Each time a date selection is changed, the below method of CalendarViewDelegate is called.
func calendarView(_ calendarView: CalendarProtocol, didChangeSelectionDateTo date: Date, at indexPath: IndexPath)
EventsCalendar handles events population both syncronously and asyncronously. CalendarViewDelegate has two optional methods for event handling:
func calendarView(_ calendarView: CalendarProtocol, eventDaysForCalendar type: CalendarViewType, with calendarInfo: CalendarInfo, and referenceDate: Date) -> Set<Int>?
func calendarView(_ calendarView: CalendarProtocol, eventDaysForCalendar type: CalendarViewType, with calendarInfo: CalendarInfo, and referenceDate: Date, completion: @escaping (Result<Set<Int>, Error>)->())
Use the first method if the event days for the current month is readily available.
Use the second method if the event days for the current month must be retreived through a network call or any heavy calculation is required before deciding events for the month. It is advised to do the heavy calculations without blocking the main thread.
Events caching comes by default in EventsCalendar while using events population asyncronously. This helps to reduce redudant network calls or redundant operation for a specific month and improves fast event population in the calendar. Anyways to turn off event caching, you can use,
monthCalendarView.allowsEventsCaching = false // Default value: true
To run the example project, clone the repo, and run pod install from the Example directory first.
iOS 9.0+
EventsCalendar is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'EventsCalendar'Akaash Dev, heatblast.akaash@gmail.com
EventsCalendar is available under the MIT license. See the LICENSE file for more info.