- (void)webImageManager:(SDWebImageManager *)imageManager didFinishWithImage:(UIImage *)image
{
CGSize targetSize = CGSizeMake(image.size.width*4/sqrt(5.0f),
image.size.width*2/sqrt(5.0f));
UIGraphicsBeginImageContext(targetSize);
[image drawInRect:CGRectMake(image.size.width*(1/sqrt(5.0f)*2-1),
image.size.width*(1/sqrt(5.0f)-1),
image.size.width*2,
image.size.height*2)];
image = UIGraphicsGetImageFromCurrentImageContext();
UIImage *blurredImage = [self blurryImage: image withBlurLevel: 0.1];
[self.bgImageView setImage:blurredImage];
[selfsetNeedsLayout];
}