Centre vertically the title of the bar button iOS7 - ios

Question

I need to centre vertically the title of the bar button and the button itself, as you can see from the code below, I tried to use setTitlePositionAdjustment and setBackgroundVerticalPositionAdjustment.
I expected:
setTitlePositionAdjustment to change the title position, however it
changed the position of my background image.
setBackgroundVerticalPositionAdjustment to change background image
position, however it didnt make any difference
I am a bit confused of this behaviour as the same code worked fine for iOS6. And I am looking for any solution to centre UIButtonItem title vertically. Thank you for your time and help in advance.
+(UIBarButtonItem *)barButtonItemWithTitle:(NSString *)title Color:(UIColor *)color Target:(id)target Action:(SEL)action{
UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithTitle:title style:UIBarButtonItemStylePlain target:target action:action];
[barButton setBackgroundImage:[UIImage imageNamed:#"standardButtonBackgroundHighlight"]];
[barButton setBackgroundVerticalPositionAdjustment:-2.0 forBarMetrics:UIBarMetricsDefault];
[barButton setTitlePositionAdjustment:UIOffsetMake(1, 2) forBarMetrics:UIBarMetricsDefault];
NSShadow *shadow = [[NSShadow alloc ]init];
shadow.shadowColor = [UIColor clearColor];
NSDictionary *attributes = #{ NSForegroundColorAttributeName : [UIColor redColor],
NSShadowAttributeName: shadow,
NSFontAttributeName : /*pass the font*/ };
[barButton setTitleTextAttributes:attributes forState:UIControlStateNormal];
return barButton;
}
Not using storyboard or nibs.

Answer 1

Try to play with the frame of UIButton as custom view for UIBarButtonItem.
*infoBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[infoBtn addTarget:self action:#selector(infoClicked:) forControlEvents:UIControlEventTouchUpInside];
[infoBtn setImage:[UIImage imageNamed:#"btn.png"] forState:UIControlStateNormal];
[infoBtn setImage:[UIImage imageNamed:#"btn-selected.png"] forState:UIControlStateHighlighted];
[infoBtn setFrame:CGRectMake(0.f, 0.f, 60.f, 20.f)];
UIBarButtonItem *barBtnItem = [[UIBarButtonItem alloc] initWithCustomView:barBtn];