Exposed cache paths - fixes #339

SDWebImage/SDImageCache.h

@@ -202,4 +202,23 @@ typedef void(^SDWebImageQueryCompletedBlock)(UIImage *image, SDImageCacheType ca
  */
 - (BOOL)diskImageExistsWithKey:(NSString *)key;
 
+/**
+ *  Get the cache path for a certain key (needs the cache path root folder)
+ *
+ *  @param key  the key (can be obtained from url using cacheKeyForURL)
+ *  @param path the cach path root folder
+ *
+ *  @return the cache path
+ */
+- (NSString *)cachePathForKey:(NSString *)key inPath:(NSString *)path;
+
+/**
+ *  Get the default cache path for a certain key
+ *
+ *  @param key the key (can be obtained from url using cacheKeyForURL)
+ *
+ *  @return the default cache path
+ */
+- (NSString *)defaultCachePathForKey:(NSString *)key;
+
 @end

SDWebImage/SDImageCache.m

@@ -116,8 +116,6 @@ BOOL ImageDataHasPNGPreffix(NSData *data) {
     }
 }
 
-#pragma mark SDImageCache (private)
-
 - (NSString *)cachePathForKey:(NSString *)key inPath:(NSString *)path {
     NSString *filename = [self cachedFileNameForKey:key];
     return [path stringByAppendingPathComponent:filename];
@@ -127,6 +125,8 @@ BOOL ImageDataHasPNGPreffix(NSData *data) {
     return [self cachePathForKey:key inPath:self.diskCachePath];
 }
 
+#pragma mark SDImageCache (private)
+
 - (NSString *)cachedFileNameForKey:(NSString *)key {
     const char *str = [key UTF8String];
     if (str == NULL) {