Question: Any idea why the custom nav bar back button image isn't displaying with this code?

instead of showing the uiimage it's showing the "< Back" default iOS button in text only

```
    [self.navigationController setNavigationBarHidden:NO animated:NO];

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"freccia.png"] landscapeImagePhone:nil style:UIBarButtonItemStylePlain target:nil action:@selector(backBtnPress)];

```

could it be this parameter? `UIBarButtonItemStylePlain`

thanks

Answer: 
You usually set the back button in the parent view controller. However, it might just be easier to use `leftBarButtonItem` instead of `backBarButtonItem`.
you can solve this problem by two ways
1. use leftBarButtonItem instead of backBarButtonItem
2. try the below code

```
  self.navigationItem.backBarButtonItem =[[UIBarButtonItem alloc] initWithTitle:@" " style:UIBarButtonItemStylePlain target:nil action:nil];

```