Expose the sync version of remove API

SDWebImage/SDImageCache.h

@@ -167,6 +167,15 @@ typedef NSString * _Nullable (^SDImageCacheAdditionalCachePathBlock)(NSString *
             toDisk:(BOOL)toDisk
         completion:(nullable SDWebImageNoParamsBlock)completionBlock;
 
+/**
+ * Synchronously store image into memory cache at the given key.
+ *
+ * @param image  The image to store
+ * @param key    The unique image cache key, usually it's image absolute URL
+ */
+- (void)storeImageToMemory:(nullable UIImage*)image
+                    forKey:(nullable NSString *)key;
+
 /**
  * Synchronously store image NSData into disk cache at the given key.
  *
@@ -177,7 +186,7 @@ typedef NSString * _Nullable (^SDImageCacheAdditionalCachePathBlock)(NSString *
                       forKey:(nullable NSString *)key;
 
 
-#pragma mark - Query and Retrieve Ops
+#pragma mark - Contains and Check Ops
 
 /**
  *  Asynchronously check if image exists in disk cache already (does not load the image)
@@ -195,6 +204,8 @@ typedef NSString * _Nullable (^SDImageCacheAdditionalCachePathBlock)(NSString *
  */
 - (BOOL)diskImageDataExistsWithKey:(nullable NSString *)key;
 
+#pragma mark - Query and Retrieve Ops
+
 /**
  * Asynchronously queries the cache with operation and call the completion when done.
  *
@@ -268,6 +279,20 @@ typedef NSString * _Nullable (^SDImageCacheAdditionalCachePathBlock)(NSString *
  */
 - (void)removeImageForKey:(nullable NSString *)key fromDisk:(BOOL)fromDisk withCompletion:(nullable SDWebImageNoParamsBlock)completion;
 
+/**
+ Synchronously remove the image from memory cache.
+ 
+ @param key The unique image cache key
+ */
+- (void)removeImageFromMemoryForKey:(nullable NSString *)key;
+
+/**
+ Synchronously remove the image from disk cache.
+ 
+ @param key The unique image cache key
+ */
+- (void)removeImageFromDiskForKey:(nullable NSString *)key;
+
 #pragma mark - Cache clean Ops
 
 /**

SDWebImage/SDImageCache.m

@@ -196,6 +196,14 @@
     }
 }
 
+- (void)storeImageToMemory:(UIImage *)image forKey:(NSString *)key {
+    if (!image || !key) {
+        return;
+    }
+    NSUInteger cost = SDMemoryCacheCostForImage(image);
+    [self.memCache setObject:image forKey:key cost:cost];
+}
+
 - (void)storeImageDataToDisk:(nullable NSData *)imageData
                       forKey:(nullable NSString *)key {
     if (!imageData || !key) {
@@ -462,6 +470,32 @@
     }
 }
 
+- (void)removeImageFromMemoryForKey:(NSString *)key {
+    if (!key) {
+        return;
+    }
+    
+    [self.memCache removeObjectForKey:key];
+}
+
+- (void)removeImageFromDiskForKey:(NSString *)key {
+    if (!key) {
+        return;
+    }
+    dispatch_sync(self.ioQueue, ^{
+        [self _removeImageFromDiskForKey:key];
+    });
+}
+
+// Make sure to call form io queue by caller
+- (void)_removeImageFromDiskForKey:(NSString *)key {
+    if (!key) {
+        return;
+    }
+    
+    [self.diskCache removeDataForKey:key];
+}
+
 #pragma mark - Cache clean Ops
 
 - (void)clearMemory {