bubblewrap_kvo_fix.rb

# hotfix for ios 9.3.1 KVO issue (perhaps specifically for observering NSDefaults)
# reference
# http://stackoverflow.com/questions/36193503/kvo-broken-in-ios-9-3
module BubbleWrap
  module KVO
    class Registry
      attr_accessor :observer_last_called_at

      def observeValueForKeyPath(key_path, ofObject: target, change: change, context: context)
        key_paths = callbacks[target] || {}
        blocks = key_paths[key_path] || []

        args = change.values_at(*keys)
        args << key_path
        
        @observer_last_called_at ||= 0.0
        
        blocks.each do |block|
          block.call(*args)
        end if CFAbsoluteTimeGetCurrent() - 0.005 > @observer_last_called_at 

        @observer_last_called_at = CFAbsoluteTimeGetCurrent()
        
      end

    end
  end
end