循环遍历NSDictionary以创建单独的NSArrays

Question

我有一个庞大的NSDictionary,我需要循环并创建单独的NSArrays.以下是内容:

(
        {
        id =         {
            text = "";
        };
        sub =         {
            text = " , ";
        };
        text = "";
        "thumb_url" =         {
            text = "";
        };
        title =         {
            text = "2010-2011";
        };
        type =         {
            text = "title";
        };
    },
        {
        id =         {
            text = "76773";
        };
        sub =         {
            text = "December 13, 2010";
        };
        text = "";
        "thumb_url" =         {
            text = "http://www.puc.edu/__data/assets/image/0004/76774/varieties/thumb.jpg";
        };
        title =         {
            text = "College Days - Fall 2010";
        };
        type =         {
            text = "gallery";
        };
    },
        {
        id =         {
            text = "";
        };
        sub =         {
            text = "";
        };
        text = "";
        "thumb_url" =         {
            text = "";
        };
        title =         {
            text = "2009-2010";
        };
        type =         {
            text = "title";
        };
    },
        {
        id =         {
            text = "76302";
        };
        sub =         {
            text = "December 3, 2010";
        };
        text = "";
        "thumb_url" =         {
            text = "http://www.puc.edu/__data/assets/image/0019/76303/varieties/thumb.jpg";
        };
        title =         {
            text = "Christmas Colloquy";
        };
        type =         {
            text = "gallery";
        };
    }
)

每个部分都有一个类型键,我需要检查.当找到title密钥时,我需要将它们添加到数组中.然后,使用gallery密钥的下一部分需要在其自己的数组中,直到找到另一个title密钥.然后把gallery键放到自己的数组中.

我正在使用UITableView章节标题和内容.因此,NSDictionary上面应该有一个NSArray *titles;数组和另外两个数组,每个数组都包含标题后面的图库.

我试过使用for循环,但我似乎无法正确使用它.任何想法,将不胜感激.

Answer 1

你的日志有点不清楚,但我猜你的NSDictionary价值是NSDictionary多少？如果是这样:

NSMutableArray *titles = [NSMutableArray array];
// etc.

for (id key in sourceDictionary) {
  NSDictionary *subDictionary = [sourceDictionary objectForKey:key];
  if ([subDictionary objectForKey:@"type"] == @"title")
    [titles addObject:[subDictionary objectForKey:@"title"]];
  // etc.
}

你的问题有点不清楚......但这就是你如何正确地循环NSDictionary.

编辑:

NSMutableDictionary *galleries = [NSMutableDictionary dictionary];
NSString *currentTitle;

for (id key in sourceDictionary) {
  NSDictionary *subDictionary = [sourceDictionary objectForKey:key];
  NSString *type = [subDictionary objectForKey:@"type"];
  if (type == @"title") {
    currentTitle = [subDictionary objectForKey:@"title"];
    if ([galleries objectForKey:currentTitle] == nil)
      [galleries setObject:[NSMutableArray array] forKey:currentTitle];
  } else if (type == @"gallery" && currentTitle != nil)
    [[galleries objectForKey:currentTitle] addObject:subDictionary];
}

在此循环之后,galleries将包含类型的键NSString(具有标题的值)和类型的相应对象NSArray(具有库的值NSDictionarys).希望这是你想要的.

Answer 2

NSString *key;
for(key in someDictionary){
     NSLog(@"Key: %@, Value %@", key, [someDictionary objectForKey: key]);
}