Selector of one item of UIToolbar doesn't work

read the following code:

// Creiamo la toolbar sotto
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 372, 320, 44)];
toolbar.tintColor = [UIColor blackColor];
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"imgImpostazioniToolbar.png"]];
UIBarButtonItem *pulsanteImpostazioni = [[UIBarButtonItem alloc] initWithCustomView:imageView];
[pulsanteImpostazioni setTarget:self];
[pulsanteImpostazioni setAction:@selector(prova)];
[imageView release];
UIBarButtonItem *spaziatore = [[UIBarButtonItem alloc]                          initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
NSArray *buttons = [[NSArray alloc] initWithObjects:spaziatore, pulsanteImpostazioni, spaziatore, nil];
[toolbar setItems:buttons animated:NO];
[self.view addSubview:toolbar];
[buttons release];

I can see correctly my image but when I try to touch it nothing happen. I didn't set correctly the selector of "pulsanteImpostazioni开发者_如何转开发"? Thanks

P.s. "prova" contain only a NSLog.

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Try [pulsanteImpostazioni setAction:@selector(prova:)];

The colon at the end of the selector name matters.

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i find the solution in this mode:

    UIButton *pulsanteImpostazioni = [UIButton buttonWithType:UIButtonTypeCustom];
[pulsanteImpostazioni setFrame:CGRectMake(0, 0, 200, 50)];
[pulsanteImpostazioni setImage:[UIImage imageNamed:@"imgImpostazioniToolbar.png"] forState:UIControlStateNormal];
[pulsanteImpostazioni addTarget:self action:@selector(prova) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *pulsanteImpostazioni = [[UIBarButtonItem alloc] initWithCustomView:pulsanteImpostazioni];

Thanks anyway for your answers =)