How to make UIToolbar have a Clear Background?

Subclass UIToolbar, and implement the below method:

- (void)drawRect:(CGRect)rect 
{
  [[UIColor colorWithWhite:0 alpha:0.6f] set]; // or clearColor etc
  CGContextFillRect(UIGraphicsGetCurrentContext(), rect);
}

see more details here

[self.toolbar setBackgroundImage:[UIImage new]
              forToolbarPosition:UIToolbarPositionAny
                      barMetrics:UIBarMetricsDefault];

 [self.toolbar setBackgroundColor:[UIColor clearColor]];