Question

I have the following code that adds a button of type UIBarButtonItem on UIToolbar (postoInfo):

UIImage *faceImage = [UIImage imageNamed:@"informazioni.png"];
UIButton *face = [UIButton buttonWithType:UIButtonTypeCustom];

[face addTarget:self action:@selector(press:) forControlEvents:UIControlEventTouchUpInside];

face.bounds = CGRectMake( 0, 0, 30, 30 );
[face setImage:faceImage forState:UIControlStateNormal];

buttonOne = [[UIBarButtonItem alloc] initWithCustomView:face];

NSArray *buttons = [NSArray arrayWithObjects: buttonOne, nil];

[postoInfo setItems: buttons animated:YES];

I would call a method when the button is pressed, I added,
the following line, but does not work:

[face addTarget:self action:@selector(press:) forControlEvents:UIControlEventTouchUpInside];

Answer 1

You should provide correct frame property for UIButton, now it has CGRectZero:

face.frame = CGRectMake( 0, 0, 30, 30 ); 

Cocoa: What's the difference between the frame and the bounds?