NS_ENUM & NS_OPTIONS

@@ -9,11 +9,11 @@
 #import <Foundation/Foundation.h>
 #import "SDWebImageCompat.h"
 
-enum SDImageCacheType {
+typedef NS_ENUM(NSInteger, SDImageCacheType) {
     /**
      * The image wasn't available the SDWebImage caches, but was downloaded from the web.
      */
-            SDImageCacheTypeNone = 0,
+            SDImageCacheTypeNone,
     /**
      * The image was obtained from the disk cache.
      */
@@ -23,7 +23,6 @@ enum SDImageCacheType {
      */
             SDImageCacheTypeMemory
 };
-typedef enum SDImageCacheType SDImageCacheType;
 
 /**
  * SDImageCache maintains a memory cache and an optional disk cache. Disk cache write operations are performed

@@ -31,6 +31,14 @@
 
 #endif
 
+#ifndef NS_ENUM
+#define NS_ENUM(_type, _name) enum _name : _type _name; enum _name : _type
+#endif
+
+#ifndef NS_OPTIONS
+#define NS_OPTIONS(_type, _name) enum _name : _type _name; enum _name : _type
+#endif
+
 #if OS_OBJECT_USE_OBJC
     #undef SDDispatchQueueRelease
     #undef SDDispatchQueueSetterSementics

@@ -10,7 +10,7 @@
 #import "SDWebImageCompat.h"
 #import "SDWebImageOperation.h"
 
-typedef enum {
+typedef NS_OPTIONS(NSUInteger, SDWebImageDownloaderOptions) {
     SDWebImageDownloaderLowPriority = 1 << 0,
     SDWebImageDownloaderProgressiveDownload = 1 << 1,
     /**
@@ -39,9 +39,9 @@ typedef enum {
      */
             SDWebImageDownloaderAllowInvalidSSLCertificates = 1 << 6
 
-} SDWebImageDownloaderOptions;
+};
 
-typedef enum {
+typedef NS_ENUM(NSInteger, SDWebImageDownloaderExecutionOrder) {
     SDWebImageDownloaderFIFOExecutionOrder,
     /**
      * Default value. All download operations will execute in queue style (first-in-first-out).
@@ -50,7 +50,7 @@ typedef enum {
     /**
      * All download operations will execute in stack style (last-in-first-out).
      */
-} SDWebImageDownloaderExecutionOrder;
+};
 
 extern NSString *const SDWebImageDownloadStartNotification;
 extern NSString *const SDWebImageDownloadStopNotification;

@@ -11,7 +11,7 @@
 #import "SDWebImageDownloader.h"
 #import "SDImageCache.h"
 
-typedef enum {
+typedef NS_OPTIONS(NSUInteger, SDWebImageOptions) {
     /**
      * By default, when a URL fail to be downloaded, the URL is blacklisted so the library won't keep trying.
      * This flag disable this blacklisting.
@@ -56,7 +56,7 @@ typedef enum {
      * Useful for testing purposes. Use with caution in production.
      */
             SDWebImageAllowInvalidSSLCertificates = 1 << 7
-} SDWebImageOptions;
+};
 
 typedef void(^SDWebImageCompletedBlock)(UIImage *image, NSError *error, SDImageCacheType cacheType);