Drawing with shadow offset

gistfile1.m

- (void)drawInRect:(CGRect)rect {
    CGSize shadowOffset = CGSizeMake(0, -1);
    float colorValues[] = {0, 0, 0, .9};
	
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    CGContextSaveGState(ctx);
	
    CGContextSetShadow (ctx, shadowOffset, 1);
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    CGColorRef color = CGColorCreate(colorSpace, colorValues);
    CGContextSetShadowWithColor (ctx, shadowOffset, 1, color);
	
    [super drawTextInRect:rect];
	
    CGColorRelease(color);
    CGColorSpaceRelease(colorSpace); 
	
    CGContextRestoreGState(ctx);
}