MyButton.h

#import <Foundation/Foundation.h>


@interface MyButton : UIButton
{
	NSDictionary *dict;
}

@property (nonatomic, retain) NSDictionary *dict;


- (id)initWithDict:(NSDictionary *)aDict;

@end

MyButton.m

#import "MyButton.h"


@implementation MyButton

@synthesize dict;

- (id)initWithDict:(NSDictionary *)aDict {
	if (self = [super init]) {
		dict = aDict;
	}
	return self;
}

- (void)dealloc
{
	[dict release];
    [super dealloc];
}


@end

Usage.m

- (void)showDetails:(id)sender
{
    [self.navigationController setToolbarHidden:YES animated:NO];
	
	PlaceOneViewController *poController = [[PlaceOneViewController alloc] initWithDict:[sender dict]];
	[self.navigationController pushViewController:poController animated:YES];
}


- (void)loadButton 
{
	MyButton *rightButton = [[MyButton alloc] initWithDict:annotation.dict];
	[rightButton setImage:[UIImage imageNamed:@"flag.png"] forState:UIControlStateNormal];			
	rightButton.frame = CGRectMake(0, 0, 25, 25);
	[rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];				
	[self.view addSubview:rightButton];

}