Changed the current internal GIF implementation. We will only return an UIImage with a single animated frame (basically a static image). We do set it in the images array so we can distinguish between those and real static images. Dropped all other GIF code.

SDWebImage/UIImage+GIF.h

@@ -10,10 +10,14 @@
 
 @interface UIImage (GIF)
 
-+ (UIImage *)sd_animatedGIFNamed:(NSString *)name;
+/**
-
+ *  Compatibility method - creates an animated UIImage from an NSData, it will only contain the 1st frame image
+ */
 + (UIImage *)sd_animatedGIFWithData:(NSData *)data;
 
-- (UIImage *)sd_animatedImageByScalingAndCroppingToSize:(CGSize)size;
+/**
+ *  Checks if an UIImage instance is a GIF. Will use the `images` array
+ */
+- (BOOL)isGIF;
 
 @end

SDWebImage/UIImage+GIF.m

@@ -8,6 +8,7 @@
 
 #import "UIImage+GIF.h"
 #import <ImageIO/ImageIO.h>
+#import "objc/runtime.h"
 
 @implementation UIImage (GIF)
 
@@ -20,142 +21,26 @@
 
     size_t count = CGImageSourceGetCount(source);
 
-    UIImage *animatedImage;
+    UIImage *staticImage;
 
     if (count <= 1) {
-        animatedImage = [[UIImage alloc] initWithData:data];
+        staticImage = [[UIImage alloc] initWithData:data];
-    }
+    } else {
-    else {
+        // we will only retrieve the 1st frame. the full GIF support is available via the FLAnimatedImageView category.
-        NSMutableArray *images = [NSMutableArray array];
+        // this here is only code to allow drawing animated images as static ones
-
+        CGImageRef CGImage = CGImageSourceCreateImageAtIndex(source, 0, NULL);
-        NSTimeInterval duration = 0.0f;
+        UIImage *frameImage = [UIImage imageWithCGImage:CGImage scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp];
-
+        staticImage = [UIImage animatedImageWithImages:@[frameImage] duration:0.0f];
-        for (size_t i = 0; i < count; i++) {
+        CGImageRelease(CGImage);
-            CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL);
-            if (!image) {
-                continue;
-            }
-
-            duration += [self sd_frameDurationAtIndex:i source:source];
-
-            [images addObject:[UIImage imageWithCGImage:image scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp]];
-
-            CGImageRelease(image);
-        }
-
-        if (!duration) {
-            duration = (1.0f / 10.0f) * count;
-        }
-
-        animatedImage = [UIImage animatedImageWithImages:images duration:duration];
     }
 
     CFRelease(source);
 
-    return animatedImage;
+    return staticImage;
 }
 
-+ (float)sd_frameDurationAtIndex:(NSUInteger)index source:(CGImageSourceRef)source {
+- (BOOL)isGIF {
-    float frameDuration = 0.1f;
+    return (self.images != nil);
-    CFDictionaryRef cfFrameProperties = CGImageSourceCopyPropertiesAtIndex(source, index, nil);
-    NSDictionary *frameProperties = (__bridge NSDictionary *)cfFrameProperties;
-    NSDictionary *gifProperties = frameProperties[(NSString *)kCGImagePropertyGIFDictionary];
-
-    NSNumber *delayTimeUnclampedProp = gifProperties[(NSString *)kCGImagePropertyGIFUnclampedDelayTime];
-    if (delayTimeUnclampedProp) {
-        frameDuration = delayTimeUnclampedProp.floatValue;
-    }
-    else {
-
-        NSNumber *delayTimeProp = gifProperties[(NSString *)kCGImagePropertyGIFDelayTime];
-        if (delayTimeProp) {
-            frameDuration = delayTimeProp.floatValue;
-        }
-    }
-
-    // Many annoying ads specify a 0 duration to make an image flash as quickly as possible.
-    // We follow Firefox's behavior and use a duration of 100 ms for any frames that specify
-    // a duration of <= 10 ms. See <rdar://problem/7689300> and <http://webkit.org/b/36082>
-    // for more information.
-
-    if (frameDuration < 0.011f) {
-        frameDuration = 0.100f;
-    }
-
-    CFRelease(cfFrameProperties);
-    return frameDuration;
-}
-
-+ (UIImage *)sd_animatedGIFNamed:(NSString *)name {
-    CGFloat scale = [UIScreen mainScreen].scale;
-
-    if (scale > 1.0f) {
-        NSString *retinaPath = [[NSBundle mainBundle] pathForResource:[name stringByAppendingString:@"@2x"] ofType:@"gif"];
-
-        NSData *data = [NSData dataWithContentsOfFile:retinaPath];
-
-        if (data) {
-            return [UIImage sd_animatedGIFWithData:data];
-        }
-
-        NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:@"gif"];
-
-        data = [NSData dataWithContentsOfFile:path];
-
-        if (data) {
-            return [UIImage sd_animatedGIFWithData:data];
-        }
-
-        return [UIImage imageNamed:name];
-    }
-    else {
-        NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:@"gif"];
-
-        NSData *data = [NSData dataWithContentsOfFile:path];
-
-        if (data) {
-            return [UIImage sd_animatedGIFWithData:data];
-        }
-
-        return [UIImage imageNamed:name];
-    }
-}
-
-- (UIImage *)sd_animatedImageByScalingAndCroppingToSize:(CGSize)size {
-    if (CGSizeEqualToSize(self.size, size) || CGSizeEqualToSize(size, CGSizeZero)) {
-        return self;
-    }
-
-    CGSize scaledSize = size;
-    CGPoint thumbnailPoint = CGPointZero;
-
-    CGFloat widthFactor = size.width / self.size.width;
-    CGFloat heightFactor = size.height / self.size.height;
-    CGFloat scaleFactor = (widthFactor > heightFactor) ? widthFactor : heightFactor;
-    scaledSize.width = self.size.width * scaleFactor;
-    scaledSize.height = self.size.height * scaleFactor;
-
-    if (widthFactor > heightFactor) {
-        thumbnailPoint.y = (size.height - scaledSize.height) * 0.5;
-    }
-    else if (widthFactor < heightFactor) {
-        thumbnailPoint.x = (size.width - scaledSize.width) * 0.5;
-    }
-
-    NSMutableArray *scaledImages = [NSMutableArray array];
-
-    for (UIImage *image in self.images) {
-        UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
-        
-        [image drawInRect:CGRectMake(thumbnailPoint.x, thumbnailPoint.y, scaledSize.width, scaledSize.height)];
-        UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
-
-        [scaledImages addObject:newImage];
-
-        UIGraphicsEndImageContext();
-    }
- 
-    return [UIImage animatedImageWithImages:scaledImages duration:self.duration];
 }
 
 @end