UIColor gradient from two UIColors, to be used with a UILabel.textColor or a NSMutableAttributeString.

UIColor gradient cateogry

+ (UIColor*) gradientFromColor:(UIColor*)c1 toColor:(UIColor*)c2 withHeight:(int)height
{
  CGSize size = CGSizeMake(1, height);
  UIGraphicsBeginImageContextWithOptions(size, NO, 0);
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB();
  
  NSArray* colors = [NSArray arrayWithObjects:(id)c1.CGColor, (id)c2.CGColor, nil];
  CGGradientRef gradient = CGGradientCreateWithColors(colorspace, (CFArrayRef)colors, NULL);
  CGContextDrawLinearGradient(context, gradient, CGPointMake(0, 0), CGPointMake(0, size.height), 0);
  
  UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
  
  CGGradientRelease(gradient);
  CGColorSpaceRelease(colorspace);
  UIGraphicsEndImageContext();
  
  return [UIColor colorWithPatternImage:image];
}