Merge pull request #115 from jcole/master

Added a few methods to SDImageCache to get number of items in file cache and memory cache, and size of items in memory

SDWebImage/SDImageCache.h

@@ -122,4 +122,19 @@
  */
 - (int)getSize;
 
+/**
+ * Get the number of images in the disk cache
+ */
+- (int)getDiskCount;
+
+/**
+ * Get the total size of images in memory cache
+ */
+- (int)getMemorySize;
+
+/**
+ * Get the number of images in the memory cache
+ */
+- (int)getMemoryCount;
+
 @end

SDWebImage/SDImageCache.m

@@ -360,4 +360,34 @@ static SDImageCache *instance;
     return size;
 }
 
+- (int)getDiskCount
+{
+    int count = 0;
+    NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:diskCachePath];
+    for (NSString *fileName in fileEnumerator)
+    {
+        count += 1;
+    }
+    
+    return count;
+}
+
+- (int)getMemorySize
+{
+    int size = 0;
+    
+    for(id key in [memCache allKeys])
+    {
+        UIImage *img = [memCache valueForKey:key];
+        size += [UIImageJPEGRepresentation(img, 0) length];
+    };
+    
+    return size;
+}
+
+- (int)getMemoryCount
+{
+    return [[memCache allKeys] count];
+}
+
 @end