iphone - 想要使用 json for ios5 获取对象数组

Question

我搜索了完整的谷歌搜索。但没有找到答案。我在从 json 结果解析对象数组时遇到问题。我有这样的json结果：

[{"created_at":"Sat Apr 28 13:36:24 +0000 2012", "text":"@LisaPrejean 爱你的工作！做得很好！", "source":"web","user":{ "id":478983313,"name":"3rd Dimension Media", "created_at":"Mon Jan 30 21:51:20 +0000 2012","favourites_count":0}, "retweet_count":0}]

＆从结果中我只想提取“created_at”和“text”

• (void)connectionDidFinishLoading:(NSURLConnection *)connection {
  NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]; NSLog(@"%@", jsonString); self.jsonData = nil;

  NSArray *tweetArray = [jsonString JSONValue]; 
   tweetTextArray = [NSMutableArray array];
  for (NSDictionary *tweet in tweetArray) 
  

  { [tweetTextArray addObject:[tweet objectForKey:@"text"]]; [tweetCreated_atArray addObject:[tweet objectForKey:@"created_at"]]; } }

但在线出现 EXC_bad_access 错误： NSArray *tweetArray = [jsonString JSONValue];

Answer 1

尝试这个

NSString *responseString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]; 
SBJSON *parser = [[SBJSON alloc] init];
NSDictionary *data = (NSDictionary *) [parser objectWithString:responseString error:nil];
NSString *text = (NSString *) [data objectForKey:@"text"];
NSLog(@"textvalue= %@",text);
NSString * created_at = (NSString *) [data objectForKey:@"created_at"];
NSLog(@"created_at= %@",created_at);