iOS: Add date And Time on image Or Add text On Imae

- (UIImage *) addText:(UIImage *)img { 

    int w = img.size.width; 

    int h = img.size.height; 

    CGColorSpaceRef colorSpace= CGColorSpaceCreateDeviceRGB(); 

    CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4*w, colorSpace, kCGImageAlphaPremultipliedFirst); 

    CGContextDrawImage(context, CGRectMake(0,0, w, h), img.CGImage); 

    CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1); 

    NSDateFormatter *format = [[NSDateFormatter alloc] init];

    [format setDateFormat:@"MMM dd, yyyy HH:mm:ss"];

    NSDate *now = [[NSDate alloc] init];

    NSString *dateString = [format stringFromDate:now];

    [now release];

    [format release];

    char* text = (char *)[dateString cStringUsingEncoding:NSASCIIStringEncoding];

    CGContextSelectFont(context, "Arial", 20, kCGEncodingMacRoman); 

    CGContextSetTextDrawingMode(context, kCGTextFill); 

    CGContextSetRGBFillColor(context, 255,255,255,1); 

    CGContextShowTextAtPoint(context, 24, 52, text, strlen(text)); 

    CGImageRef imageMasked = CGBitmapContextCreateImage(context); 

    CGContextRelease(context); 

    CGColorSpaceRelease(colorSpace);

    UIImageWriteToSavedPhotosAlbum([UIImage imageWithCGImage:imageMasked],nil,nil,nil);

    return [UIImage imageWithCGImage:imageMasked]; 

}