在 NSMutableDictionary 的 key 下添加多个对象

Question

我想要实现的是以下，将一个值（关键字）存储在一个字典中的键（帐户）下，然后将该字典存储在另一个带有键（列表）的字典下，最后将该字典存储在另一个字典下键（allKeys）。

- (void)addFilterForAccount:(NSString *)account forKeyword:(NSString *)keyword inList:(NSString *)list {

    //Set properties for NSStrings
    account = _accountName;
    keyword = _textField2.text;
    list = _listName;
    //Clear the textField
    _textField2.text = @"";
    //Store this information into a dictionary/array
    _keys = [[NSMutableDictionary alloc] init];
    [_keys setObject:keyword forKey:account];

    _keywords = [[NSMutableDictionary alloc] init];
    [_keywords setObject:_keys forKey:list];

    _filters = [[NSMutableDictionary alloc] init];
    [_filters setValue:_keywords forKey:@"allKeys"];

    //nomenclature would be:
    //
    //_filters[@"allKeys"][@"//listName\\"][@"//accountName\\"]

    NSLog(@"%@", _filters);
}

我有以下代码应该做我想做的事，但此时的问题是它不允许多个键。所以如果我想在一个列表下存储多个关键字，当我注销时应该是这样的：

2014-09-07 18:31:12.562 Filterfeed[4050:124143] {
    allKeys =     {
        "Breaking News" =         (
                        {
                BreakingNews = romney
                               obama
                               bush
                               clinton;
            }
        );
    };
}

但现在它只是一个名称，每次我调用此方法时都会被替换。

实际打印出来的内容：

2014-09-07 18:31:12.562 Filterfeed[4050:124143] {
    allKeys =     {
        "Breaking News" =         (
                        {
                BreakingNews = romney;
            }
        );
    };
}

Answer 1

你希望这个方法是：

- (void)addFilterForAccount:(NSString *)account forKeyword:(NSString *)keyword inList:(NSString *)list { 

//Set properties for NSStrings 
account = _accountName; 
keyword = _textField2.text; 
list = _listName; 
//Clear the textField 
_textField2.text = @""; 
//Store this information into a dictionary/array 
_keys = [[NSMutableDictionary alloc] init]; 
NSMutableArray *array = [NSUserDefualts standardUserDefaults] objectForKey: list]; 
[array addObject: keyword]; 
[[NSUserDefualts standardUserDefaults] setObject: array forKey: list]; 
[[NSUserDefualts standardUserDefaults] synchronize]; 
NSMutableArray *array2 = [NSUserDefualts standardUserDefaults] objectForKey: list]; 
[_keys setObject:array2 forKey:account]; 
_keywords = [[NSMutableDictionary alloc] init]; 
[_keywords setObject:_keys forKey:list]; 

_filters = [[NSMutableDictionary alloc] init]; 
[_filters setValue:_keywords forKey:@"allKeys"]; 

//nomenclature would be: 
// 
//_filters[@"allKeys"][@"//listName\\"][@"//accountName\\"] 

NSLog(@"%@", _filters); 
}