DEVELOP: Cleanup

Author: kean

DFImageManager/Source/Core/Utilities/DFCompositeImageTask.h

@@ -50,7 +50,7 @@ typedef void (^DFCompositeImageTaskCompletionHandler)(DFCompositeImageTask *__no
  @param imageHandler The image handler gets called each time the image is successfully fetched, but it doesn't get called for obsolete tasks.
  @param completionHandler Completion handler that is executed after there are no remaining image tasks that are not either completed or cancelled.
  */
-+ (nullable DFCompositeImageTask *)compositeImageTaskWithRequests:(nonnull NSArray *)requests imageHandler:(nullable DFCompositeImageTaskImageHandler)imageHandler completionHandler:(nullable DFCompositeImageTaskCompletionHandler)completionHandler;
++ (nullable instancetype)compositeImageTaskWithRequests:(nonnull NSArray *)requests imageHandler:(nullable DFCompositeImageTaskImageHandler)imageHandler completionHandler:(nullable DFCompositeImageTaskCompletionHandler)completionHandler;
 
 /*! Image handler. The image handler gets called each time the image is successfully fetched, but it doesn't get called for obsolete tasks.
  */

DFImageManager/Source/Core/Utilities/DFCompositeImageTask.m

@@ -51,7 +51,7 @@ + (nullable DFCompositeImageTask *)compositeImageTaskWithRequests:(nonnull NSArr
             [tasks addObject:task];
         }
     }
-    return tasks.count ? [[DFCompositeImageTask alloc] initWithImageTasks:tasks imageHandler:imageHandler completionHandler:completionHandler] : nil;
+    return tasks.count ? [[[self class] alloc] initWithImageTasks:tasks imageHandler:imageHandler completionHandler:completionHandler] : nil;
 }
 
 - (void)resume {

DFImageManager/Source/Core/Utilities/DFNetworkReachability.m

@@ -84,7 +84,7 @@ + (nonnull instancetype)_reachabilityForInternetConnection {
 
 + (nonnull instancetype)_reachabilityWithAddress:(const struct sockaddr_in *)hostAddress; {
     SCNetworkReachabilityRef reachabilityRef = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, (const struct sockaddr *)hostAddress);
-    return [[DFNetworkReachability alloc] initWithReachability:reachabilityRef];
+    return [[[self class] alloc] initWithReachability:reachabilityRef];
 }
 
 - (void)_determineCurrentReachabilityFlags {

DFImageManager/Source/NSURLSession/DFURLImageFetcher.h

@@ -82,7 +82,7 @@ extern NSString *const DFURLRequestCachePolicyKey;
 /*! A set containing all the supported URL schemes. The default set contains "http", "https", "ftp", "file" and "data" schemes.
  @note The property can be changed in case there are any custom protocols supported by NSURLSession.
  */
-@property (nonatomic) NSSet *supportedSchemes;
+@property (nonatomic, copy) NSSet *supportedSchemes;
 
 /*! The delegate of the receiver.
  */