A few handy snippets when working with MacRuby.

core_ext.rb

class Symbol

  def to_selector
    "#{self}:".to_sym
  end
  
end

class NSObject
  
  # Usage:
  #   bind 'Rollin', :start_server, from: obj
  def bind name, method, opts={}
    NSNotificationCenter.defaultCenter.addObserver self,
      selector: method.to_selector,
      name: name,
      object: opts[:from]
  end
  
  # Usage:
  #   trigger 'Rollin'
  def trigger name, object=nil
    NSNotificationCenter.defaultCenter.postNotificationName name,
      object: object || self
  end
  
  # Defers the method to be called until the next event pass
  def defer method, arg=nil
    performSelector method.to_selector, withObject:arg, afterDelay:0 
  end
  
end