iphone - Custom UIBarButtonItem for back button

Question

I am trying to use a custom item for the back button in my navigation bar.

UIImage *backButtonImage = [UIImage imageNamed:@"backbutton.png"];
UIBarButtonItem *customItem = [[UIBarButtonItem alloc] initWithImage:backButtonImage style:UIBarButtonItemStylePlain target:nil action:nil];
[self.navigationItem setBackBarButtonItem: customItem];
[customItem release];

What I end up getting is my image with a border around it. It looks like this (My image is the back button):

How can I get rid of the border? What am I doing wrong?

Answer 1

Your image is appearing inside of a back button and it is apparently (from your screenshot) not the same size as the back button.

You might want to hide the back button and then replace it with a "Left Bar Button" instead.

Code:

UIImage *backButtonImage = [UIImage imageNamed:@"backbutton.png"];
UIBarButtonItem *customItem = [[UIBarButtonItem alloc] initWithImage:backButtonImage style:UIBarButtonItemStylePlain target:self.navigationController action:@selector(popViewControllerAnimated:)];
[self.navigationController setHidesBackButton:YES];
[self.navigationItem setLeftBarButtonItem: customItem];
[customItem release];