Simple NSTimer extension to support closures

NSTimer+Closure.swift

extension NSTimer {
    private class TimerClosure {
        private let closure: (NSTimer) -> Void
        init(closure: (NSTimer) -> Void) { self.closure = closure }
        @objc func selector(timer: NSTimer) { self.closure(timer) }
    }
    
    static func scheduledTimerWithTimeInterval(ti: NSTimeInterval, closure aClosure: (NSTimer) -> Void, userInfo: AnyObject?, repeats yesOrNo: Bool) -> NSTimer {
        let wrapped = TimerClosure(closure: aClosure)
        return NSTimer.scheduledTimerWithTimeInterval(ti, target: wrapped, selector: "selector:", userInfo: userInfo, repeats: yesOrNo)
    }
    
    static func scheduledTimerWithTimeInterval(ti: NSTimeInterval, userInfo: AnyObject?, repeats yesOrNo: Bool, closure aClosure: (NSTimer) -> Void) -> NSTimer {
        let wrapped = TimerClosure(closure: aClosure)
        return NSTimer.scheduledTimerWithTimeInterval(ti, target: wrapped, selector: "selector:", userInfo: userInfo, repeats: yesOrNo)
    }
}