RYRCalendar

RYRCalendar tries to bring a simple approach to implement a calendar in any iOS app using Swift 2.2

Instalation

Cocoapods

To integrate RYRCalendar into your Xcode project using Cocoapods, specify it in your Podfile:

target 'TargetName' do
	pod 'RYRCalendar'
end

Carthage

Work in progress!

Manually

Download the .zip in your computer and import all the files contained in RYRCalendar/RYRCalendar to your project.

Note that with *Cocoapods* or *Carthage* the minimum required version will be iOS 8. 
If you want to support iOS 7, just import the files manually to your project. 

Requirements

Supports iOS 7 and up, written in Swift.

Implementation

Using Storyboard:

Create a new view, set the class to RYRCalendar and make an IBOutlet to it.

@IBOutlet weak var calendar: RYRCalendar!

Using code:

let calendar = RYRCalendar(frame: CGRectMake(0, 0, 100, 100))

calendar.delegate = self
calendar.selectionType = .Multiple
calendar.totalMonthsFromNow = 6
calendar.update()

• selectionType: Will determine the behaviour of the calendar on selection.

   enum RYRCalendarSelectionType: Int {
  		case None, Single, Multiple
   }
  

• totalMonthsFromNow: In other words, how many months will the calendar show. If you update it, call calendar.update().

• baseDate: It is defaulted to NSDate(). Modify it if you want the calendar start in a different date than this.

• style: Defaulted to 'Ryanair app' style, it can be modified. Check Customization below for more info.

Delegate

You will need to implement RYRCalendarDelegate protocol to be able to get info from it:

protocol RYRCalendarDelegate: class {
   func calendarDidSelectDate(calendar: RYRCalendar, selectedDate: NSDate)
   func calendarDidSelectMultipleDate(calendar: RYRCalendar, selectedStartDate startDate: NSDate, endDate: NSDate)
   func isDateAvailableToSelect(date: NSDate) -> Bool
   func calendarDidScrollToMonth(calendar: RYRCalendar, monthDate: NSDate)
}

• calendarDidSelectDate(calendar: RYRCalendar, selectedDate: NSDate): It will be called every time the user selects a date. If the .selectionType property is set to .Multiple, this method will not be called when multiple dates are selected (only for the first one).

• calendarDidSelectMultipleDate(calendar: RYRCalendar, startDate: NSDate, endDate: NSDate): It will be called when both dates are selected, so you don't have to handle the logic of checking if both dates are selected.

• isDateAvailableToSelect(date: NSDate) -> Bool: If you don't implement it, it will return true by default. Override it if there are any dates you don't want them to be selectable (and apply the disabled style).

• calendarDidScrollToMonth(calendar: RYRCalendar, monthDate: NSDate): It is called when some new section is displayed. You can use it when you need to refresh or get more data for further months.

##Customization Every view inside the calendar supports customized UI elements (fonts, colors, sizes, images...). You can override the default style by setting a new style in the calendar.style property:

calendar.style.calendarHeaderStyle = RYRCalendarHeaderStyle(workDayFont:
	UIFont(name: "Arial", size: 15)!, 
	workDayTextColor: UIColor.yellowColor(), 
	weekendDayFont: UIFont(name: "Arial", size: 18)!, 
	weekendDayTextColor: UIColor.orangeColor(), 
	backgroundColor: UIColor.whiteColor()
)

Here is the main style enum from the calendar, and explanation for each property:

struct RYRCalendarStyle {
   // CollectionView properties
   var monthHeaderHeight: Double
   var monthHeaderStyle: RYRMonthHeaderStyle
   var calendarHeaderStyle: RYRCalendarHeaderStyle
   
   // Cell styles
   var cellStyleEnabled: RYRDayCellStyle
   var cellStyleDisabled: RYRDayCellStyle
   var cellStyleToday: RYRDayCellStyle
   var cellStyleEmpty: RYREmptyCellStyle
   
   // Single selection cell style
   var cellStyleSelected: RYRDayCellStyle
   var cellStyleSelectedMultiple: RYRDayCellStyle
   
   // Multiple selection cell styles
   var cellStyleFirstSelected: RYRDayCellStyle
   var cellStyleLastSelected: RYRDayCellStyle
   var cellStyleMiddleSelected: RYRDayCellStyle
}

• monthHeaderHeight: Height of the header for each month (section) of the calendar
• monthHeaderStyle: Style for the header for each month (section) of the calendar
• calendarHeaderStyle: Style for the header of the calendar (the view in the top with week days)
• cellStyleEnabled: Style for the normal state of a cell
• cellStyleDisabled: Style for the disabled cell (when delegate returns false for isDateAvailableToSelect)
• cellStyleToday: Style for the cell that has the same date as today
• cellStyleEmpty: Style for the empty spaces before the month start (just set it's background colour to the view background colour)
• cellStyleSelected: If the selection is .Single, this will be the style for the selected cell
• cellStyleSelectedMultiple: If the selection is .Multiple and user has selected two times the same date, this will be it's style.
• cellStyleFirstSelected: Style for the first selection with .Multiple selection enabled.
• cellStyleLastSelected: Style for the last selection with .Multiple selection enabled.
• cellStyleMiddleSelected: Style for the middle cells between the first date selected and the second date selected (if any).

Check RYRCalendarStyle and it's properties for more information.