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CalendarKit

March 11, 2024

146282209-191d8550-3cfa-45f5-bd82-6a9d2b53bc6f1

CalendarKit is a Swift calendar UI library for iOS and Mac Catalyst. It looks similar to the Apple Calendar app out-of-the-box, while allowing customization when needed. CalendarKit is composed of multiple modules which can be used together or independently.

Tutorials

Create iOS Calendar App in Swift with CalendarKit

Need Help?

If you have a programming question about how to use CalendarKit in your application, ask it on StackOverflow with the CalendarKit tag. Check out the Sample App for reference.

Please, use GitHub Issues only for reporting a bug or requesting a new feature.

Examples

Video

Sample App

To try CalendarKit with CocoaPods issue the following command in the Terminal:


                                              
                                                pod try CalendarKit

Installation

CalendarKit can be installed with Swift Package Manager or with CocoaPods.

Swift Package Manager (Xcode 12 or higher)

The preferred way of installing CalendarKit is via the Swift Package Manager.

In Xcode, open your project and navigate to File → Swift Packages → Add Package Dependency…
Paste the repository URL (https://github.com/richardtop/CalendarKit.git) and click Next.
For Rules, select Version (Up to Next Major) and click Next.
Click Finish.

Adding Package Dependencies to Your App

CocoaPods

To install it, add the following line to your Podfile:


                                              
                                                pod ‘CalendarKit’

Adding Pods to an Xcode project

Usage

Subclass DayViewController
Implement EventDataSource protocol to show events.

CalendarKit requires EventDataSource to return an array of objects conforming to EventDescriptor protocol, specifying all the information needed to display a particular event. You’re free to use a default Event class as a model or create your own class conforming to the EventDescriptor protocol.


                                              
                                                // Return an array of EventDescriptors for particular date

override func eventsForDate(_ date: Date) -> [EventDescriptor] {

var models = myAppEventStore.getEventsForDate(date) // Get events (models) from the storage / API
var events = [Event]()
for model in models {

// Create new EventView

let event = Event()

// Specify DateInterval

event.dateInterval = DateInterval(start: model.startDate, end: model.endDate)

// Add info: event title, subtitle, location to the array of Strings

var info = [model.title, model.location]

info.append(“\(datePeriod.beginning!.format(with: “HH:mm”)) – \(datePeriod.end!.format(with: “HH:mm”))”)

// Set “text” value of event by formatting all the information needed for display

event.text = info.reduce(“”, {$0 + $1 + “\n”})

events.append(event)

}

return events

}

After receiving an array of events for a particular day, CalendarKit will handle view layout and display.

Usage

To respond to the user input, override mehtods of DayViewDelegate, for example:


                                              
                                                override func dayViewDidSelectEventView(_ eventView: EventView) {

print(“Event has been selected: \(eventview.data)”)

}
override func dayViewDidLongPressEventView(_ eventView: EventView) {

print(“Event has been longPressed: \(eventView.data)”)

}

Localization

CalendarKit supports localization and uses iOS default locale to display month and day names. First day of the week is also selected according to the iOS locale.

Styles

By default, CalendarKit looks similar to the Apple Calendar app and fully supports Dark Mode. If needed, CalendarKit’s look can be easily customized. Steps to apply a custom style are as follows:

Create a new CalendarStyle object (or copy existing one)
Change style by updating the properties.
Invoke updateStyle method with the new CalendarStyle.


                                              
                                                let style = CalendarStyle()

style.backgroundColor = UIColor.black

dayView.updateStyle(style)