文件临时路径

- (NSString *)pathForTemporaryFileWithPrefix:(NSString *)prefix

{

    NSString *  result;

    CFUUIDRef   uuid;

    CFStringRef uuidStr;

    

    uuid = CFUUIDCreate(NULL);

    

    uuidStr = CFUUIDCreateString(NULL, uuid);

    

    result = [NSTemporaryDirectory()stringByAppendingPathComponent:[NSStringstringWithFormat:@"%@-%@", prefix, uuidStr]];

    

    CFRelease(uuidStr);

    CFRelease(uuid);

    

    return result;

}

- (NSString *)pathForASIHTTPDownLoadCache

{

    NSString *path = [self pathForTemporaryFileWithPrefix:@"iKnow"];

    return [path stringByAppendingPathComponent:@"Download"];

}