Question

From the documentation, I see this for the backBarButtonItem:

When this property is nil, the navigation item uses the value in its
title (page 10) property to create an appropriate back button. If you
want to specify a custom image or title for the back button, you can
assign a custom bar button item (with your custom title or image) to
this property instead. When configuring your bar button item, do not
assign a custom view to it; the navigation item ignores custom views
in the back bar button anyway.

I didn’t know if this was the same for leftBarButtonItem? Basically I have this code:

UIButton *homeButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
UIImage *homeImage = [UIImage imageNamed:@"icon_house.png"];
[homeButton setImage:homeImage forState:UIControlStateNormal];
[homeButton addTarget:self action:@selector(homePressed:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *homeBBI = [[UIBarButtonItem alloc] initWithCustomView:homeButton];

Prior to iOS 5, I put this in a UIToolBar and it showed up fine. Now I want to put this as the leftBarButtonItem, to the right of the UINavigationController’s backButton. When I set it, it does not show up at all. There is no image. However, when I create some button like this:

    UIBarButtonItem *hButton = [[UIBarButtonItem alloc] initWithTitle:@"home" style:UIBarButtonItemStylePlain target:self action:@selector(homePressed:)];

and set it as the leftBarButtonItem, it shows up. I didn’t know how I could get my custom icon for my home button without the borders. When I use:

    UIBarButtonItem *hButton2 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"icon_house.png"] style:UIBarButtonItemStylePlain target:self action:@selector(homePressed:)];

I get a border around my house_icon that i do not want. Thanks.

Answer 1

try this

UIButton *TastoVersamento = [UIButton buttonWithType:UIButtonTypeCustom];
        [TastoVersamento setImage:[UIImage imageNamed:@"Versamento.png"] forState:UIControlStateNormal];
        [TastoVersamento addTarget:self action:@selector(Click_Versamento:) forControlEvents:UIControlEventTouchUpInside];
        [TastoVersamento setFrame:CGRectMake(0, 0, 40, 40)];
        [[self navigationItem] setLeftBarButtonItem:[[[UIBarButtonItem alloc] initWithCustomView:TastoVersamento] autorelease]];