ios - json解析崩溃

Question

我无法解析这个 json:

{
"dati": [
    {
        "id": "1",
        "nome": "Perugia01"
    },
    {
        "id": "2",
        "nome": "Perugia02"
    }
]
}

我正在尝试:

AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithBaseURL:baseURL];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];

[manager GET:path parameters:nil success:^(NSURLSessionDataTask *task, id responseObject)
 {
     NSLog(@"Success: %@", responseObject);

     NSDictionary *jsonDict = (NSDictionary *) responseObject;

     NSMutableArray *firstZero = [[NSMutableArray alloc] init];
     [firstZero addObject:[jsonDict objectForKey:@"dati"]];

     NSMutableDictionary *weatherDict = [firstZero objectAtIndex:0];

     NSString *codice = [weatherDict objectForKey:@"id"];  //Here I got a crash
     NSString *nome = [weatherDict objectForKey:@"nome"];

     NSLog(@"Codice cantiere: %@\nNome cantiere: %@",codice, nome);
 }failure:^(NSURLSessionDataTask *task, NSError *error)
 {
     // Failure
     NSLog(@"Failure: %@", error);
     NSString *errore = [NSString stringWithFormat:@"%@",error];
     UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Errore" message:errore delegate:nil cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
     [alert show];
 }];

但是我收到这条消息时崩溃了:

[__NSCFArray objectForKey:]: unrecognized selector sent to instance 0xa1a6ee0
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFArray objectForKey:]: unrecognized selector sent to instance 0xa1a6ee0'

我不明白这是怎么回事。objectforkey 好像有问题，不知道是什么原因。 你能帮我弄清楚吗？

Answer 1

你正在解析一个数组而不是一个字典:

[manager GET:path parameters:nil success:^(NSURLSessionDataTask *task, id responseObject)
 {
     NSLog(@"Success: %@", responseObject);

     NSArray *dati  = [responseObject objcForKey:@"dati"]];

     for (NSDictionary *datiDict in dati) {
         NSString *codice = [datiDict objectForKey:@"id"];  //Here I got a crash
         NSString *nome = [datiDict objectForKey:@"nome"];

         NSLog(@"Codice cantiere: %@\nNome cantiere: %@",codice, nome);
     }

 }failure:^(NSURLSessionDataTask *task, NSError *error)
 {
     // Failure
     NSLog(@"Failure: %@", error);
     NSString *errore = [NSString stringWithFormat:@"%@",error];
     UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Errore" message:errore delegate:nil cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
     [alert show];
 }];