How we get data from server using the JSON query? - ios

Question

**In this code When add breakpoint from viewdidload( ) function then i got greetingArray.count zero but when i add breakpoint at the for loop then it works properly and i got the results 3 as the values of the greetingArray. What is the possible reason that no getting the data from server.There is no problem with server side.I already check for it.
- (void)viewDidLoad
{
[super viewDidLoad];
greetingArray = [[NSMutableArray alloc] init];
greetingDictionary = [[NSMutableDictionary alloc] init];
NSString *connectionString;
connectionString=[NSString stringWithFormat:#"http://xxx.xxx.x.xx/TestMgt/api/%#",self.fieldName];
NSURL *url = [NSURL URLWithString:connectionString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response,
NSData *data, NSError *connectionError)
{
if (data.length > 0 && connectionError == nil)
{
NSLog(#"----------------------------------------------------");
NSLog(#"Data length is = %d",data.length);
greetingMArray = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];
NSLog(#"%#",greetingMArray);
for(int i = 0 ; i< greetingMArray.count; i++)
{
greetingDictionary = (NSMutableDictionary *)[greetingMArray objectAtIndex:i];
NSLog(#"%#",greetingDictionary);
ConnectionOvertime *overtime = [[ConnectionOvertime alloc] init];
overtime.entryDate=[greetingDictionary valueForKey:#"EntryDate"];
[greetingArray addObject:overtime];
NSLog(#"%d",greetingArray.count);
}
}
}];
}

Answer 1

if you don't get any answer try jsonFramework library and import sbjsonParser.h
for Example try below code
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.ChapterID=[[NSMutableArray alloc]init];
self.ChapterName=[[NSMutableArray alloc]init];
NSURL *url=[NSURL URLWithString:#"https://www.coursekart.com/webservice/load-subjects.php?api_key=68410920GHJFLAC878&standard_id=2&format=json"];
NSURLRequest *request=[[NSURLRequest alloc]initWithURL:url];
NSError *error;
NSURLResponse *response;
NSData *data=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if(data!=nil)
{
NSString *content=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
if(content.length!=0)
{
SBJsonParser *parser=[[SBJsonParser alloc]init];
NSArray *dir=[[parser objectWithString:content]objectForKey:#"SubjectList"];
for(int i=0;i<dir.count;i++)
{
NSDictionary *array=[dir objectAtIndex:i];
NSArray *data=[array objectForKey:#"Data"];
NSDictionary *dat=(NSDictionary *)data;
NSString *idCh=[dat objectForKey:#"id"];
NSString *slug=[dat objectForKey:#"slug"];
[ChapterID addObject:idCh];
[ChapterName addObject:slug];
// NSLog(#"%#",[ChapterID objectAtIndex:0]);
//NSLog(#"%#",[ChapterName objectAtIndex:0]);
}
}
}
}