objective-c - 对象-C : Convert an Array of objects into an NSDictionary for use with JSONRepresentation

Question

我有一个自定义对象的 NSMutableArray，其中包含各种信息。 例如，该对象可能包含:

firstname
lastname
email

我希望能够将这些对象添加到 NSDictionary 中，以便我可以调用 SBJSON 的“JSONRepresentation”函数，最终的 JSON 格式如下所示:

{
    "Users" : [
               { "user1First" : "FirstName",
                 "user1Last"  : "LastName",
                 "user1Email" : "Email" },
               { "user2First" : "FirstName",
                 "user2Last"  : "LastName",
                 "user2Email" : "Email" },
               { "user3First" : "FirstName",
                 "user3Last"  : "LastName",
                 "user3Email" : "Email" }
               ]
}

Answer 1

为每个自定义类编写一个 dictionaryRepresentation，该类返回该特定对象的字典。然后你可以做这样的事情:

NSMutableArray *dictionaryArray = [NSMutableArray arrayWithCapacity:yourOtherArray.count];
for (id object in yourOtherArray) {
    [dictionaryArray addObject:[object dictionaryRepresentation]];
}
// not sure what SBJSON's function returns so I'm using id here
id JSONRepresentation = [dictionaryArray JSONRepresentation];