Objective-Cのクロージャ

SomeController.m

// Make button block.
UIBarButtonItem* (^buttonWithTitle)(NSString*, SEL) = ^(NSString* title, SEL action)
{
  UIBarButtonItem* button = [UIBarButtonItem alloc];
  [button initWithTitle:title
                  style:UIBarButtonItemStyleBordered
                 target:self
                 action:action];
  [button setWidth:65.0f];
  [button autorelease];
  
  return button;
};

// Make buttons.
UIBarButtonItem* some1Button = buttonWithTitle(@"some1", @selector(onClickSome1:));
UIBarButtonItem* some2Button = buttonWithTitle(@"some2", @selector(onClickSome2:));