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copied!<p>I decided to add full code for memory saving, if you are using GIF files, modify UIImage scale method (Found it here, an Stackoverflow). As said <strong>GangstaGraham</strong> in SD Image exist method sd_animatedImageByScalingAndCroppingToSize</p> <pre><code>@interface UIImage (Scaling) -(UIImage *)imageByScalingProportionallyToSize:(CGSize)targetSize; -(UIImage*) croppedImageWithRect: (CGRect) rect; @end @implementation UIImage (Scaling) - (UIImage *)imageByScalingProportionallyToSize:(CGSize)targetSize { if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) { if ([[UIScreen mainScreen] scale] == 2.0) { targetSize.height *= 2.0f; targetSize.width *= 2.0f; } } NSUInteger width = targetSize.width; NSUInteger height = targetSize.height; UIImage *newImage = [self resizedImageWithMinimumSize: CGSizeMake (width, height)]; return [newImage croppedImageWithRect: CGRectMake ((newImage.size.width - width) / 2, (newImage.size.height - height) / 2, width, height)]; } -(CGImageRef)CGImageWithCorrectOrientation { if (self.imageOrientation == UIImageOrientationDown) { //retaining because caller expects to own the reference CGImageRetain([self CGImage]); return [self CGImage]; } UIGraphicsBeginImageContext(self.size); CGContextRef context = UIGraphicsGetCurrentContext(); if (self.imageOrientation == UIImageOrientationRight) { CGContextRotateCTM (context, 90 * M_PI/180); } else if (self.imageOrientation == UIImageOrientationLeft) { CGContextRotateCTM (context, -90 * M_PI/180); } else if (self.imageOrientation == UIImageOrientationUp) { CGContextRotateCTM (context, 180 * M_PI/180); } [self drawAtPoint:CGPointMake(0, 0)]; CGImageRef cgImage = CGBitmapContextCreateImage(context); UIGraphicsEndImageContext(); return cgImage; } -(UIImage*)resizedImageWithMinimumSize:(CGSize)size { CGImageRef imgRef = [self CGImageWithCorrectOrientation]; CGFloat original_width = CGImageGetWidth(imgRef); CGFloat original_height = CGImageGetHeight(imgRef); CGFloat width_ratio = size.width / original_width; CGFloat height_ratio = size.height / original_height; CGFloat scale_ratio = width_ratio > height_ratio ? width_ratio : height_ratio; CGImageRelease(imgRef); return [self drawImageInBounds: CGRectMake(0, 0, round(original_width * scale_ratio), round(original_height * scale_ratio))]; } -(UIImage*)drawImageInBounds:(CGRect)bounds { UIGraphicsBeginImageContext(bounds.size); [self drawInRect: bounds]; UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return resizedImage; } -(UIImage*)croppedImageWithRect:(CGRect)rect { UIGraphicsBeginImageContext(rect.size); CGContextRef context = UIGraphicsGetCurrentContext(); CGRect drawRect = CGRectMake(-rect.origin.x, -rect.origin.y, self.size.width, self.size.height); CGContextClipToRect(context, CGRectMake(0, 0, rect.size.width, rect.size.height)); [self drawInRect:drawRect]; UIImage* subImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return subImage; } -(UIImage *) resizableImageWithCapInsets2: (UIEdgeInsets) inset { if ([self respondsToSelector:@selector(resizableImageWithCapInsets:resizingMode:)]) { return [self resizableImageWithCapInsets:inset resizingMode:UIImageResizingModeStretch]; } else { float left = (self.size.width-2)/2;//The middle points rarely vary anyway float top = (self.size.height-2)/2; return [self stretchableImageWithLeftCapWidth:left topCapHeight:top]; } } @end </code></pre> <p>And UIImageView:</p> <pre><code>#import <SDWebImage/SDImageCache.h> @implementation UIImageView (Scaling) -(void)setImageWithURL:(NSURL*)url scaleToSize:(BOOL)scale { if(url.absoluteString.length < 10) return; if(!scale){ [self setImageWithURL:url]; return; } __block UIImageView* selfimg = self; __block NSString* prevKey = SPRINTF(@"%@_%ix%i", url.absoluteString, (int)self.frame.size.width, (int)self.frame.size.height); __block UIImage* prevImage = nil; dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_async(queue, ^ { prevImage = [[SDImageCache sharedImageCache] imageFromDiskCacheForKey:prevKey]; if(prevImage){ dispatch_async(dispatch_get_main_queue(), ^ { [self setImage:prevImage]; }); }else{ [[SDWebImageDownloader sharedDownloader] downloadImageWithURL:url options:SDWebImageDownloaderFILOQueueMode progress:nil completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) { if(error){ [selfimg setImageWithURL:url scaleToSize:scale]; }else{ dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_async(queue, ^ { prevImage = [image imageByScalingProportionallyToSize:self.frame.size]; if(finished) [[SDImageCache sharedImageCache] storeImage:prevImage forKey:prevKey]; dispatch_async(dispatch_get_main_queue(), ^ { [self setImage:prevImage]; }); }); } }]; } }); return; } -(void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder scaleToSize:(BOOL)scale { [self setImage:placeholder]; [self setImageWithURL:url scaleToSize:scale]; } @end </code></pre>

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