如何从 NSDictionary 获取值并将其移动到 NSArray

How get a value from NSDictionary and move it to an NSArray

我敢肯定这个问题已经在这里被问过几十次了,但我似乎找不到任何接近我需要的东西。我在解决这个问题时遇到了一点问题。我需要从 NSDictionary 中获取一个值并将其放入 NSArray.

    NSDictionary *dictionary = @{@"ID1":@{
                                   @"mainPhone": @"<number>",
                                   @"Address": @"<address>",
                                   @"City": @"<Tulsa, OK>",
                                   @"Date": @"1-1-2017",
                                   @"Person1": @{
                                               @"First": @"<FirstName>",
                                               @"Last":  @"<LastName>",
                                               @"Phone": @"<number>",
                                               @"Email": @"email@gmail.com",
                                               @"Birth": @"<date>",
                                               @"ID":    @"12345",
                                   },
                                   @"Person2": @{
                                               @"First": @"<FirstName>",
                                               @"Last":  @"<LastName>",
                                               @"Phone": @"<number>",
                                               @"Email": @"email@gmail.com",
                                               @"Birth": @"<date>",
                                               @"ID":    @"12345",
                              },
                              @"ID2":@{
                                   @"mainPhone": @"<number>",
                                   @"Address": @"<address>",
                                   @"City": @"<Tulsa, OK>",
                                   @"Date": @"1-1-2017",
                                   @"Person3": @{
                                               @"First": @"<FirstName>",
                                               @"Last":  @"<LastName>",
                                               @"Phone": @"<number>",
                                               @"Email": @"email@gmail.com",
                                               @"Birth": @"<date>",
                                               @"ID":    @"12345",
                                   },
                                   @"Person4": @{
                                               @"First": @"<FirstName>",
                                               @"Last":  @"<LastName>",
                                               @"Phone": @"<number>",
                                               @"Email": @"email@gmail.com",
                                               @"Birth": @"<date>",
                                               @"ID":    @"12345",
                              },
              };

在我上面的示例字典中,我需要获取第3层字典下的键First并将其加载到数组中。标记为 IDPerson 的字典将分配单独的 ID 号,这将是唯一不是静态的键。提前致谢。

为此,您可以循环遍历字典,首先使用 idKey,然后访问该字典并通过循环访问其详细信息。

for (NSString *key in dictionary) {
    NSDictionary *idDic = [dictionary objectForKey:key];
    for (NSString *idDicKey in idDic) {
        if ([[idDic objectForKey:idDicKey] isKindOfClass:[NSDictionary class]]) {
            NSString *firstName = [dictionary valueForKeyPath:[NSString stringWithFormat:@"%@.%@.First",key, idDicKey]];
            NSLog(@"%@",firstName);
        }
    }
}