import Foundation

extension NSTimer {

// MARK: Schedule timers

/// Create and schedule a timer that will call `block` once after the specified time.

public class func after(interval: NSTimeInterval, _ block: () -> Void) -> NSTimer {

let timer = NSTimer.new(after: interval, block)

timer.start()

return timer

}

/// Create and schedule a timer that will call `block` repeatedly in specified time intervals.

public class func every(interval: NSTimeInterval, _ block: () -> Void) -> NSTimer {

let timer = NSTimer.new(every: interval, block)

timer.start()

return timer

}

/// Create and schedule a timer that will call `block` repeatedly in specified time intervals.

/// (This variant also passes the timer instance to the block)

@nonobjc public class func every(interval: NSTimeInterval, _ block: NSTimer -> Void) -> NSTimer {

let timer = NSTimer.new(every: interval, block)

timer.start()

return timer

}

// MARK: Create timers without scheduling

/// Create a timer that will call `block` once after the specified time.

///

/// - Note: The timer won't fire until it's scheduled on the run loop.

/// Create a timer that will call `block` repeatedly in specified time intervals.

///

/// - Note: The timer won't fire until it's scheduled on the run loop.

/// Use `NSTimer.every` to create and schedule a timer in one step.

/// - Note: The `new` class function is a workaround for a crashing bug when using convenience initializers (rdar://18720947)

public class func new(every interval: NSTimeInterval, _ block: () -> Void) -> NSTimer {

/// (This variant also passes the timer instance to the block)

///

/// - Note: The timer won't fire until it's scheduled on the run loop.

/// Use `NSTimer.every` to create and schedule a timer in one step.

/// - Note: The `new` class function is a workaround for a crashing bug when using convenience initializers (rdar://18720947)

@nonobjc public class func new(every interval: NSTimeInterval, _ block: NSTimer -> Void) -> NSTimer {

}

return timer

}

// MARK: Manual scheduling

/// Schedule this timer on the run loop

///