SBJson接口iPhone

Question

我正在尝试从正向地理编码web服务API获取JSON数据。响应格式如下。

  [
    {"total":63},{
        "t":"1",
        "lable":"Gek Poh Shopping Centre",
        "address":"762 Jurong West Street 75. (S)640762",
        "street":"Jurong West Street 75",
        "zip":"640762",
        "long":"103.6980151847",
        "lat":"1.348986165348",
        "x":"355149.0357","y":
        "149142.5301",
        "is_prem":"0",
        "pid":"47120",
        "aid":"115810",
        "lid":"245690",
        "has_biz":"1",
        "is_main_building":"1",
        "id":"245690",
        "cat_id":"80"
        },
        {
        "t":"1",
        "lable":"Gek Poh Ville Community Club (CC)",
        "address":"1 Jurong West Street 74. (S)649149",
        "street":"Jurong West Street 74",
        "zip":"649149",
        "long":"103.69890252806",
        "lat":"1.3489703630875",
        "x":"355247.7723",
        "y":"149140.7302",
        "is_prem":"0",
        "pid":"2979",
        "aid":"116734",
        "lid":"127311",
        "has_biz":"1",
        "is_main_building":"1",
        "id":"127311",
        "cat_id":"14"
        }
    ]

这是我所做的。

-(IBAction)search:(id) sender{
    self.requestString = [NSString stringWithFormat:@"http://www.streetdirectory.com/api/?mode=search&act=all&profile=sd_default&q=%@&show_additional=0&output=json&limit=1", textField.text];
    NSString *escapedString = [self.requestString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    self.request = [NSURLRequest requestWithURL:[NSURL URLWithString:escapedString]];

    responseData = [[NSMutableData alloc] init];
    rConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];

}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {

    [responseData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    SBJsonParser *parser = [[SBJsonParser alloc] init];
    NSDictionary *responseDict = [parser objectWithData:responseData];

    NSArray *resultsArray = [responseDict valueForKey:@""];   // am I doing it correctly to get the array?
    for (NSDictionary *childDic in resultsArray) {
        NSString *str = [childDic objectForKey:@"address"]; // for example I wanna get the address?
        label.text = str;
    }
}

Answer 1

你没有确切地说出你遇到了什么问题，所以我将从你发布的内容开始猜测。

在我看来，您的顶级JSON对象应该是一个包含3个字典的数组：

NSArray *responseArray = [parser objectWithData:responseData];

数组中的第一个字典似乎是一个只有一个合计值的字典：

NSDictionary *totalDict = [responseArray objectAtIndex:0];
NSLog(@"Total: %@", [totalDict objectForKey:@"total"]);

其余的字典似乎都有包含地址的记录：

for (int i = 1; i < [responseArray count]; i++) {
    NSDictionary *dict = [responseArray objectAtIndex:i];
    NSLog(@"Address %d = %@", i, [dict objectForKey:@"address"]);
}