How to add event on an array of dates in swift

if i have an array of String values storing dates, how do i display a dot marker on the calendar for these dates

array looks like this

array workoutSchedule = ["22-04-2016", "26-04-2016", "27-04-2016"]

thanks

[WenchaoD]

Hi there. Please download and see the example.

[IOSDeveloperProgrammer]

@WenchaoD I am getting same issue , how can i resolve it. please help me.

var days = [String]()
self.days = ["2017/10/10", "2017/10/10", "2017/10/14", "2017/10/16"]
self.calendar.select(self.dateFormatter1.date(from: days) !)