如何从NSDictionary获取值并将其移动到NSArray

Question

I'm sure this question has been asked dozens of times on here, but I can't seem to find anything even close to what I need. I'm having a little bit of a problem getting this right. I need to get a value out of an NSDictionary and place it into an 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",
                              },
              };

In my example dictionary above, I need to get the key First under the 3rd layer dictionary and load it into an array. The dictionaries marked ID and Person will be assigned separate ID numbers will be the only keys that will not be static. Thanks in advance.

Answer 1

For this you can go loop through the dictionary and first idKey then access that dictionary and access its detail by loop through it.

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);
        }
    }
}