How to fetch the data from JSON using key in iPhone - ios

Question

Hey I'm new to iPhone and I have been trying to parse the below JSON for displaying different types of Survey using my below code. I have two tables, in first table i want to display all the "Surveys_title" text value, and once user will tap on any survey title row then it should display their particular question and question ID in my second table. Like i have two questions for "Survey1" and three questions for "Survey2". Using my code, i am able to display all survey titles in my first table but i am getting problem that how to store array of objects for all the survey types individually. here, I have created one custom class "Survey". Thank you for any help you can give me.
JSON :
{
"Surveys": [
{
"Surveys_title": "Survey1",
"Questions": [
{
"event_sq_qns_id": 1,
"questions": "What is your primary job title/focus?"
},
{
"event_sq_qns_id": 2,
"questions": "Effectiveness of the speakers?"
}
]
},
{
"Surveys_title": "Survey2",
"Questions": [
{
"event_sq_qns_id": 3,
"questions": "What is this?"
},
{
"event_sq_qns_id": 4,
"questions": "Who are you?"
},
{
"event_sq_qns_id": 5,
"questions": "what is your name?"
}
]
},
{
"Surveys_title": "Survey3",
"Questions": [
{
"event_sq_qns_id": 6,
"questions": "What is your primary job?"
},
{
"event_sq_qns_id": 7,
"questions": "Effectiveness of the speakers?"
}
]
}
]
}
here is my code :
#import <Foundation/Foundation.h>
#interface Surveys : NSObject
#property (nonatomic, retain) NSString *surveys_question_id;
#property (nonatomic, retain) NSString *questions;
#end
- (void) fetchingSurveyQuestionsFromServer
{
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0), ^{
NSDictionary *results;
#try {
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"survey" ofType:#"json"];
NSData *responseData = [NSData dataWithContentsOfFile:filePath];
//parse the json data
NSError *error;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseData
options:kNilOptions
error:&error];
results= [json objectForKey:#"Surveys"];
}
#catch (NSException *exception) {
NSLog(#"Exception in %s %#",__FUNCTION__,exception);
}
dispatch_async (dispatch_get_main_queue (),
^{
arraySurveys = [[NSMutableArray alloc] init];
arraySurveys_type = [[NSMutableArray alloc] init];
NSString *surveys_title_name;
for (NSDictionary *dict in results) {
NSDictionary *questionDict = dict[#"Questions"];
surveys_title_name = dict[#"Surveys_title"];
NSLog(#"Questions dictionary = %#", questionDict);
NSLog(#"Survey type is = %#", surveys_title_name);
for (NSDictionary *dict1 in questionDict) {
Surveys *surveys = [[Surveys alloc] init];
surveys.surveys_question_id = [dict1 objectForKey:#"event_sq_qns_id"];
surveys.questions = [dict1 objectForKey:#"survey_questions"];
[arraySurveys addObject:surveys];
}
[arraySurveys_type addObject:surveys_title_name];
}
[MBProgressHUD hideHUDForView:self.view animated:YES];
[tblSurveys reloadData];
});
});
}
Using above code, all the questions are adding directly to the arraySurveys. please help me how can i differentiate according to the Surveys title.
Thanks.

Answer 1

Use like this ....
SBJSON *json = [[SBJSON alloc] init];
NSMutableDictionary *jsonObject = [json objectWithString:response ];
NSMutableArray *Surveys=[jsonObject valueForKey:#"Surveys"];
NSMutableArray * Surveys_title =[[NSMutableArray alloc]init];
NSMutableArray * Questions =[[NSMutableArray alloc]init];
for (NSDictionary *dictnory in Surveys) {
[Surveys_title addObject:[dictnory objectForKey:#"Surveys_title"]];
[Questions addObject:[dictnory objectForKey:#"Questions"]];
}