Parsing data from json to iphone application - iphone

Question

I am parsing data from iphone app to json from server but it does not get data from the json
i am using following code
To get Data from json
here is the link of my json data
http://celeritas-solutions.com/emrapp/surveyDescription.php?user_id=ali40
NSString*user=#"ali40";
NSString *url=[NSString stringWithFormat:#"http://celeritas-solutions.com/emrapp/surveyDescription.php?user_id=%#",user];
NSLog(url);
NSArray *tempArray =[[DataManager staticVersion] startParsing:url];
for (int i = 0; i<[tempArray count]; i++) {
id *item = [tempArray objectAtIndex:i];
NSDictionary *dict = (NSDictionary *) item;
ObjectData *theObject =[[ObjectData alloc] init];
[theObject setUser_id:[dict objectForKey:#"user_id"]];
[theObject setSurvey_id:[dict objectForKey:#"survey_id"]];
[theObject setSurvey_title:[dict objectForKey:#"survey_Title"]];
[theObject setSurvey_Description:[dict objectForKey:#"survey_Description"]];
[theObject setDate_Created:[dict objectForKey:#"date_Created"]];
[surveyList addObject:theObject];
[theObject release];
theObject=nil;
int count =[surveyList count];
NSLog(#"Total is %d",count);
DataManager Class
DataManager *theInstance;
+ (id)staticVersion{
if(!theInstance){
theInstance = [[DataManager alloc] init];
}
return theInstance;
}
- (NSMutableArray *) startParsing:(NSString *)theURLString {
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:#"%#",theURLString]];
NSString *fileContent= [NSString stringWithContentsOfURL:url];
SBJSON *parser = [[SBJSON alloc] init];
NSDictionary *data = (NSDictionary *) [parser objectWithString:fileContent error:nil];
NSArray *items = (NSArray *) data ;
return items;
int count=[items count];
NSLog(#"This is testing %d",count);
}

Answer 1

You json is not correct.
It should be like this:
{"ali40":[{"user_id":"ali40","survey_id":"1","survey_title":"Resturant Survey","survey_description":"Survey To get feedback from clients about food quality and any suggestion to improve the service","date_created":"2012-07-24 22:39:14","color":"[UIColor GrayColor]"},{"user_id":"ali40","survey_id":"2","survey_title":"Travel Servey","survey_description":"Toursim Survey","date_created":"2012-07-25 00:43:42","color":"[UIColor greyColor]"}]}
This code returns not null result
NSString*user=#"ali40";
NSString *url=[NSString stringWithFormat:#"http://celeritas-solutions.com/emrapp/surveyDescription.php?user_id=%#",user];
NSLog(#"%#",url);
NSData* data = [NSData dataWithContentsOfURL:
[NSURL URLWithString: url]];
__autoreleasing NSError* error = nil;
id result = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (error != nil) NSLog(#"%#",error);
NSLog(#"%#",result);
Output:
2012-07-26 10:26:22.226 test[2511:f803] (
{
color = "[UIColor GrayColor]";
"date_created" = "2012-07-24 22:39:14";
"survey_description" = "Survey To get feedback from clients about food quality and any suggestion to improve the service";
"survey_id" = 1;
"survey_title" = "Resturant Survey";
"user_id" = ali40;
},
{
color = "[UIColor greyColor]";
"date_created" = "2012-07-25 00:43:42";
"survey_description" = "Toursim Survey";
"survey_id" = 2;
"survey_title" = "Travel Servey";
"user_id" = ali40;
}
)
If you json returns many records you need modify your json file
{"users":[{"user_id":"ali40","survey_id":"1","survey_title":"Resturant Survey","survey_description":"Survey To get feedback from clients about food quality and any suggestion to improve the service","date_created":"2012-07-24 22:39:14","color":"[UIColor GrayColor]"},{"user_id":"ali40","survey_id":"2","survey_title":"Travel Servey","survey_description":"Toursim Survey","date_created":"2012-07-25 00:43:42","color":"[UIColor greyColor]"}]}
Then you get the array of records:
NSArray *allItems = [result objectForKey:#"users"];
for (int i=0; i<allItems.count; ++i) {
NSDictionary *item = [allItems objectAtIndex:i]; //here you get every user
NSString *user_id=[item objectForKey:#"user_id"];
NSLog(#"user_id %#",user_id);
}