Resizing UIImage

Parameters

CGInterpolationQualityLevels of interpolation quality for rendering an image.
Interpolation quality is a graphics state parametertypedef enum CGInterpolationQuality CGInterpolationQuality;

Resize any image by size & quality

- (UIImage *)drawImageBySize:(CGSize)size quality:(CGInterpolationQuality)quality
{
    UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetInterpolationQuality(context, quality);
    [self drawInRect: CGRectMake (0, 0, size.width, size.height)];
    UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return resizedImage;
}