Explain awakeFromNib, initwithFrame usage
-(void)setup
{
      self.contentMode = UIViewContentModeRedraw;
}

-(void)awakeFromNib
{
    [self setup];
}

-(id)initWithFrame:(CGRect)frame
{
     self=[super initWithFrame:frame];
     if (self) {
        [self setup];
     }
     return self;
 }