UIViewController gradient border

gistfile1.m

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        size_t num_locations = 2;
        CGFloat locations[2] = { 0.0, 1.0 };
        CGFloat components[8] = { 1.0, 1.0, 1.0, 0.0,  // Start color
            1.0, 1.0, 1.0, 1.0 }; // End color        
        CGColorSpaceRef rgbColorspace = CGColorSpaceCreateDeviceRGB();
        CGGradientRef gradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);
        CGColorSpaceRelease(rgbColorspace);
        
        // Allocate color space
        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
        // Allocate bitmap context
        CGContextRef bitmapContext = CGBitmapContextCreate(NULL, 320, 480, 8, 4 * 320, colorSpace, kCGImageAlphaNoneSkipFirst);
        // Draw Gradient Here
        CGContextDrawLinearGradient(bitmapContext, gradient, CGPointMake(0.0f, 0.0f), CGPointMake(0.0f, 480.0f),0 );
        CGGradientRelease(gradient);
        // Create a CGImage from context
        CGImageRef cgImage = CGBitmapContextCreateImage(bitmapContext);
        // Create a UIImage from CGImage
        UIImage *uiImage = [UIImage imageWithCGImage:cgImage];
        // Release the CGImage
        CGImageRelease(cgImage);
        // Release the bitmap context
        CGContextRelease(bitmapContext);
        // Release the color space
        CGColorSpaceRelease(colorSpace);
        // Create the patterned UIColor and set as background color
        self.view.layer.borderColor = [UIColor colorWithPatternImage:uiImage].CGColor;
        self.view.layer.borderWidth = 2.0f;   
    }
    return self;
}