Create custom navigation bar back button

//**************************************************************************

//Method    : createLeftNavigationButton

//Params    : create the left navigation back button with the image

//Return    :

//**************************************************************************

#define IMAGE(imageName)    (UIImage *)[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:imageName         ofType:IMAGE_TYPE_PNG]]

- (void)createLeftNavigationButton {

    

    //customize right bar button item

    UIView *backButtonView = [[UIView alloc] initWithFrame:NAVIGATION_BAR_BUTTON_RECT];

    [backButtonView setBackgroundColor:[UIColor clearColor]];

    

    UIButton *backButton = [[UIButton alloc] init];

    backButton.frame     = backButtonView.frame;

    [backButton addTarget:self action:@selector(backButtonClick:) 

         forControlEvents:UIControlEventTouchUpInside];

    [backButton setImage:IMAGE(@"backButton") forState:UIControlStateNormal];    

    [backButtonView addSubview:backButton];

    

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]  

                                  initWithCustomView:backButtonView];    

}