Number of days in the current month using iOS?

Question

How can I get the current number of days in the current month using NSDate or something similar in Cocoa touch?

Answer 1

Swift 3 syntax has changed a bit from Erez's answer:

let cal = Calendar(identifier: .gregorian)
let monthRange = cal.range(of: .day, in: .month, for: Date())!
let daysInMonth = monthRange.count