Mine

CGRect bounds = self.view.bounds;
        bounds = CGRectMake(0, 0, bounds.size.width, bounds.size.height);

        UIView* overlayView = [[[UIView alloc] initWithFrame:bounds] autorelease];
        overlayView.autoresizesSubviews = YES;
        overlayView.autoresizingMask    = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
        overlayView.opaque              = NO;
		
		UILabel *introlabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 0, 280, 100)];
		introlabel.text = @"Umístěte čárový kód karty\ndo vyznačeného pole.\nPozor na pohyb a odlesky.";
		introlabel.shadowColor = [[UIColor alloc] initWithRed:0 green:0 blue:0 alpha:.4];
		introlabel.numberOfLines = 3;
		introlabel.backgroundColor = [[UIColor alloc] initWithWhite:1 alpha:0];
		introlabel.opaque = NO;
		introlabel.textColor = [[UIColor alloc] initWithWhite:1 alpha:1];
		introlabel.textAlignment = UITextAlignmentCenter;
		[overlayView addSubview:introlabel];
		
		UIButton* button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
		[button setAlpha:.8];
		button.frame = CGRectMake(30, 360, 260, 80);
		[button setTitle:@"Problémy se skenováním?" forState:(UIControlStateNormal)];
		button.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
		button.titleLabel.textAlignment = UITextAlignmentCenter;
		[button addTarget:self action:@selector(cancelButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
		
		[overlayView addSubview:button];