RubyMotion UIView animation wrapper

animation.rb

class Animation

  def initialize(duration, animations, completion=nil, delay=0, additionalOptions=nil)
    if duration + delay == 0
      animations.call
      completion.call if completion
      return
    end

    options = UIViewAnimationOptionBeginFromCurrentState | UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionCurveEaseOut

    if additionalOptions
      options = options | additionalOptions
    end

    UIView.animateWithDuration(duration,
      delay: delay,
      options: options,
      animations: lambda { animations.call },
      completion: lambda { |finished| completion.call if finished && completion }
    )
  end

end


# Simple usage
Animation.new 0.2, -> {
  myLabel.alpha = 1.0
}

# Advanced usage
Animation.new 0.2, -> {
  myLabel.alpha = 1.0
}, -> {
  myLabel.text = 'complete'
}, 0.5, UIViewAnimationOptionCurveEaseIn