save plist method

// assumes object class called SENQuestionnaire

- (void)writeDictionaryToDisk:(SENQuestionnaire *)q
{

    NSDictionary *dataDictionary =
    @{
      @"stringA" : @"string A",
      @"stringB" : @"string B",
      @"stringC" : @"string C",
      };

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;

    NSString *doc = [basePath stringByAppendingString:@"/"];
    NSString *file = [doc stringByAppendingString:q.uniqueID];
    NSString *filePath = [file stringByAppendingString:@".plist"];

    // plistDict is a NSDictionary
    NSString *error;
    NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:dataDictionary
                                                                   format:NSPropertyListXMLFormat_v1_0
                                                         errorDescription:&error];
    if(plistData) {
        [plistData writeToFile:filePath atomically:YES];
    } else {
        NSLog(@"%@",error);
    }
}