Update to SDWebImage 4.0

DKCarouselView.podspec

@@ -11,6 +11,6 @@ Pod::Spec.new do |s|
   s.source_files  = "DKCarouselView/*.{h,m}"
   s.frameworks = "Foundation", "UIKit"
   s.requires_arc = true
-  s.dependency "SDWebImage", "~> 3.8.1"
+  s.dependency "SDWebImage", '~> 4.0'
   s.pod_target_xcconfig = { 'SWIFT_VERSION' => '3.0' }
 end

DKCarouselViewDemo/SDWebImage/SDWebImage/NSData+ImageContentType.h

@@ -1,26 +1,33 @@
-//
-// Created by Fabrice Aneche on 06/01/14.
-// Copyright (c) 2014 Dailymotion. All rights reserved.
-//
+/*
+ * This file is part of the SDWebImage package.
+ * (c) Olivier Poitrey <rs@dailymotion.com>
+ * (c) Fabrice Aneche
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
 
 #import <Foundation/Foundation.h>
+#import "SDWebImageCompat.h"
+
+typedef NS_ENUM(NSInteger, SDImageFormat) {
+    SDImageFormatUndefined = -1,
+    SDImageFormatJPEG = 0,
+    SDImageFormatPNG,
+    SDImageFormatGIF,
+    SDImageFormatTIFF,
+    SDImageFormatWebP
+};
 
 @interface NSData (ImageContentType)
 
 /**
- *  Compute the content type for an image data
+ *  Return image format
  *
- *  @param data the input data
+ *  @param data the input image data
  *
- *  @return the content type as string (i.e. image/jpeg, image/gif)
+ *  @return the image format as `SDImageFormat` (enum)
  */
-+ (NSString *)sd_contentTypeForImageData:(NSData *)data;
-
-@end
-
-
-@interface NSData (ImageContentTypeDeprecated)
-
-+ (NSString *)contentTypeForImageData:(NSData *)data __deprecated_msg("Use `sd_contentTypeForImageData:`");
++ (SDImageFormat)sd_imageFormatForImageData:(nullable NSData *)data;
 
 @end

DKCarouselViewDemo/SDWebImage/SDWebImage/NSData+ImageContentType.m

@@ -1,49 +1,46 @@
-//
-// Created by Fabrice Aneche on 06/01/14.
-// Copyright (c) 2014 Dailymotion. All rights reserved.
-//
+/*
+ * This file is part of the SDWebImage package.
+ * (c) Olivier Poitrey <rs@dailymotion.com>
+ * (c) Fabrice Aneche
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
 
 #import "NSData+ImageContentType.h"
 
 
 @implementation NSData (ImageContentType)
 
-+ (NSString *)sd_contentTypeForImageData:(NSData *)data {
++ (SDImageFormat)sd_imageFormatForImageData:(nullable NSData *)data {
+    if (!data) {
+        return SDImageFormatUndefined;
+    }
+
     uint8_t c;
     [data getBytes:&c length:1];
     switch (c) {
         case 0xFF:
-            return @"image/jpeg";
+            return SDImageFormatJPEG;
         case 0x89:
-            return @"image/png";
+            return SDImageFormatPNG;
         case 0x47:
-            return @"image/gif";
+            return SDImageFormatGIF;
         case 0x49:
         case 0x4D:
-            return @"image/tiff";
+            return SDImageFormatTIFF;
         case 0x52:
             // R as RIFF for WEBP
-            if ([data length] < 12) {
-                return nil;
+            if (data.length < 12) {
+                return SDImageFormatUndefined;
             }
-
+            
             NSString *testString = [[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange(0, 12)] encoding:NSASCIIStringEncoding];
             if ([testString hasPrefix:@"RIFF"] && [testString hasSuffix:@"WEBP"]) {
-                return @"image/webp";
+                return SDImageFormatWebP;
             }
-
-            return nil;
     }
-    return nil;
-}
-
-@end
-
-
-@implementation NSData (ImageContentTypeDeprecated)
-
-+ (NSString *)contentTypeForImageData:(NSData *)data {
-    return [self sd_contentTypeForImageData:data];
+    return SDImageFormatUndefined;
 }
 
 @end