gistfile1.m

- (void)viewDidLoad;
{
    [super viewDidLoad];
        
    self.shareButton = ({
    
        CGRect frame = CGRectMake( self.view.width - 80.0f, self.view.bottom - 44.0f, 70.0f, 44.0f );
        UIButton *button = [[UIButton alloc] initWithFrame:frame];
        
        [button setImage:[UIImage imageNamed:@"share-button-red.png"] forState:UIControlStateNormal];
        [button setImage:[UIImage imageNamed:@"share-button-red-highlighted.png"] forState:UIControlStateDisabled];
        [button addTarget:self action:@selector(share:) forControlEvents:UIControlEventTouchUpInside];
        
        [self.view addSubview:button];

        button;
    });
}