drop shadow of text in obj-c

dropShadow.m

- (void) drawTextInRect:(CGRect)rect {
    CGSize myShadowOffset = CGSizeMake(0, 0);
    float myColorValues[] = {0, 0, 0, .8};
    
    CGContextRef myContext = UIGraphicsGetCurrentContext();
    CGContextSaveGState(myContext);
    
    CGColorSpaceRef myColorSpace = CGColorSpaceCreateDeviceRGB();
    CGColorRef myColor = CGColorCreate(myColorSpace, myColorValues);
    CGContextSetShadowWithColor (myContext, myShadowOffset, 2, myColor);
    
    [super drawTextInRect:rect];
    
    CGColorRelease(myColor);
    CGColorSpaceRelease(myColorSpace); 
    
    CGContextRestoreGState(myContext);
}