objective-c - Obj-C：将对象数组转换为 NSDictionary 以与 JSONRepresentation 一起使用

Question

我有一个包含各种信息的自定义对象的 NSMutableArray。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，这样我就可以调用 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

dictionaryRepresentation为每个返回该特定对象的字典的自定义类编写一个。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];