Customize the back button of a navigation controller

I want to have two buttons on the left side of the navigation bar, one is the regular back button and the other one is a UIBarButtonItem. However I could only get it to replace the default back button. I've tried many code samp开发者_运维技巧les on the internet but couldn't get any to work. please help

Don't do this. It breaks the UI guidelines put forth by Apple. See the paragraph right before figure 6-6 of the iPhone HIG.

As far as I'm aware it's not (currently) possible to have two UIBarButtonItems on either side of a UINavigationBar.

For this you have to use the UIToolBar for multiple buttons on navigation controller

Yes you can do this by-

UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];  
UIImage *homeImage = [UIImage imageNamed:@"YOUR_IMAGE.png"];  
[backBtn setBackgroundImage:homeImage forState:UIControlStateNormal];  
[backBtn addTarget:self action:@selector(YOUR_ACTION)  
forControlEvents:UIControlEventTouchUpInside];  
backBtn.frame = CGRectMake(0, 0, 69, 26);  
UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithCustomView:backBtn];
[[self navigationItem] setLeftBarButtonItem:button1];
[button1 release];
button1 = nil;