Unrecognized selector sent to instance NSTimer Swift

Question

I\'m trying to developing an app that includes a simple Stopwatch feature. I\'m using Xcode 6 and the Swift language. Here is the code in FirstViewController

Answer 1

Another possibility: make sure your selector function doesn't throw, as that will also give you an unrecognized selector exception:

func mySelector(timer: NSTimer) throws {
}