Question

uibarbutton not responding.

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" 
                               style:UIBarButtonItemStylePlain target:nil action:nil];

When ever user tap the button then no any actions fire.

Answer 1

For that you need also use following code for the UIbarbutton.

UIBarButtonItem *cameraView = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera
                               target:self action:@selector(showCam)];

Or Also you can use following code.

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back"
                                        style:UIBarButtonItemStylePlain
                                        target:self
                                                                              action:@selector(showCam)];

it may also helping to you.