IOS自带json解析类解析json

 1 - (IBAction)test:(id)sender {
 2     NSString *result = @"{\"code\":\"S00000\",\"message\":\"success\",\"data\":{\"file_name\":\"b1feba4439d0bed9f867123637121b24-dc7764fb24f7294c6a3dcb6971eddb25.png\",\"paths\":[\"x1\",\"x2\",\"x3\",\"x5\",\"x6\",\"x7\",\"x8\",\"xm\"]}}";
 3     NSError *error;
 4     NSData* response = [result dataUsingEncoding:NSUTF8StringEncoding];
 5
 6     NSDictionary *jsonInfo = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableContainers error:&error];
 7     NSString *code = [jsonInfo objectForKey:@"code"];
 8
 9     NSLog([NSString stringWithFormat:@"%@",code]);
10
11     NSDictionary *data = [jsonInfo objectForKey:@"data"];
12     NSLog([NSString stringWithFormat:@"%@",[data objectForKey:@"file_name"]]);
13 }

第6行的NSJSONReadingOption是干嘛的没搞明白 用NSJSONReadingMutableLeaves也能正常解析