Take Bitmap from UIView

You can capture UIImage from any UIView by following function

*Note: Import the following class to use UIView layer properties 
 #import <QuartzCore/QuartzCore.h>

Code is :

+ (UIImage*)imageFromView:(UIView*)view

{

    [self beginImageContextWithSize:[view bounds].size];

    BOOL hidden = [view isHidden];

    [view setHidden:NO];

    [[view layer] renderInContext:UIGraphicsGetCurrentContext()];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    [self endImageContext];

    [view setHidden:hidden];

    return image;

}

+ (UIImage*)imageFromView:(UIView*)view scaledToSize:(CGSize)newSize

{

    UIImage *image = [self imageFromView:view];

    if ([view bounds].size.width != newSize.width ||

        [view bounds].size.height != newSize.height) {

        image = [self imageWithImage:image scaledToSize:newSize];

    }

    return image;

}

+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize

{

    [self beginImageContextWithSize:newSize];

    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

    [self endImageContext];

    return newImage;

}

Above Reference is taken from :

http://www.icab.de/blog/2010/10/01/scaling-images-and-creating-thumbnails-from-uiviews/