drawing the rectangle lines on the any object + iphone

- (void)drawRect  {
    UIGraphicsBeginImageContext(self.view.frame.size);
   
    CGContextRef currentContext = UIGraphicsGetCurrentContext();
    CGContextSetLineWidth(currentContext, 3.0); //or whatever width you want
    CGContextSetRGBStrokeColor(currentContext, 0.0, 0.0, 0.0, 1.0);
   
    CGRect myRect = CGContextGetClipBoundingBox(currentContext);
    //printf("rect = %f,%f,%f,%f\n", myRect.origin.x, myRect.origin.y, myRect.size.width, myRect.size.height);
   
    CGContextStrokeRect(currentContext, myRect);
    UIImage *backgroundImage = (UIImage *)UIGraphicsGetImageFromCurrentImageContext();
    UIImageView *myImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    [myImageView setImage:backgroundImage];
    [self.view addSubview:myImageView];
    [backgroundImage release];
   
    UIGraphicsEndImageContext();
}