Add support for archives in folders

SSZipArchive/SSZipArchive.m

@@ -320,8 +320,30 @@
 	return success;
 }
 
++ (BOOL)createZipFileAtPath:(NSString *)path withFilesAtPaths:(NSArray *)paths inFolder:(NSString *)folder {
+    BOOL success = NO;
+    SSZipArchive *zipArchive = [[SSZipArchive alloc] initWithPath:path];
+    if ([zipArchive open]) {
+        for (NSString *path in paths) {
+            if (!folder) {
+                [zipArchive writeFile:path];
+            }
+            else {
+                NSString *destination = [folder stringByAppendingPathComponent:path.lastPathComponent];
+                [zipArchive writeFileAtPath:path withFileName:destination];
+            }
+        }
+        success = [zipArchive close];
+    }
 
-+ (BOOL)createZipFileAtPath:(NSString *)path withContentsOfDirectory:(NSString *)directoryPath {
+#if !__has_feature(objc_arc)
+    [zipArchive release];
+#endif
+    
+    return success;
+}
+
++ (BOOL)createZipFileAtPath:(NSString *)path withContentsOfDirectory:(NSString *)directoryPath inFolder:(NSString *)folder {
     BOOL success = NO;
 
     NSFileManager *fileManager = nil;
@@ -336,6 +358,9 @@
         while ((fileName = [dirEnumerator nextObject])) {
             BOOL isDir;
             NSString *fullFilePath = [directoryPath stringByAppendingPathComponent:fileName];
+            if (folder) {
+                fileName = [folder stringByAppendingPathComponent: fileName];
+            }
             [fileManager fileExistsAtPath:fullFilePath isDirectory:&isDir];
             if (!isDir) {
                 [zipArchive writeFileAtPath:fullFilePath withFileName:fileName];
@@ -352,6 +377,9 @@
 	return success;
 }
 
++ (BOOL)createZipFileAtPath:(NSString *)path withContentsOfDirectory:(NSString *)directoryPath {
+    return [SSZipArchive createZipFileAtPath:path withContentsOfDirectory:directoryPath inFolder:nil];
+}
 
 - (id)initWithPath:(NSString *)path {
 	if ((self = [super init])) {