Parse a nested Json to NSDictionary in iOS - objective-c

Question

I Have a nested Json :
[
{
"result":"1",
"roleId":4
},
{
"projectInfo":[
{
"result":true
},
{
"Project":[
{
"ProjectId":5378,
"ProjectName":"ASAG",
"CountryId":146,
"ProjectGroupId":743,
"Description":"Axel Spinger AG"
},
{
"ProjectId":5402,
"ProjectName":"BIZ",
"CountryId":146,
"ProjectGroupId":759,
"Description":"Bizerba Win 7 BAU"
},
{
"ProjectId":5404,
"ProjectName":"BOM",
"CountryId":146,
"ProjectGroupId":743,
"Description":"Bombardier Transportation ThinApp Migration"
},
{
"ProjectId":5394,
"ProjectName":"REDBULL",
"CountryId":149,
"ProjectGroupId":762,
"Description":"Red Bull Mac Packaging"
},
{
"ProjectId":5397,
"ProjectName":"VHV",
"CountryId":146,
"ProjectGroupId":743,
"Description":"VHV Win7 Migration"
}
]
}
]
}
]
What I need is to separate it into small pieces to get value of some specific key like this answer: How to parse JSON into Objective C - SBJSON
My code is :
SBJsonParser* jParser = [[SBJsonParser alloc] init];
NSDictionary* root = [jParser objectWithString:string];
NSDictionary* projectInfo = [root objectForKey:#"projectInfo"];
NSArray* projectList = [projectInfo objectForKey:#"Project"];
for (NSDictionary* project in projectList)
{
NSString *content = [project objectForKey:#"ProjectId"];
NSLog(#"%#", content);
}
But I got the error when trying to get projectInfo from root node. Is there anything wrong with my code ? Please provide me an example to split up my JSON. Any help would be great.

Answer 1

You JSON contains like nested array. Just spit each content into a dictionary to get the result.
Working Code:
SBJsonParser* jParser = [[SBJsonParser alloc] init];
NSArray* root = [jParser objectWithString:string];
NSDictionary* projectDictionary = [root objectAtIndex:1];
NSArray* projectInfo = [projectDictionary objectForKey:#"projectInfo"];
NSDictionary* projectData = [projectInfo objectAtIndex:1];
NSDictionary *projectList = [projectData objectForKey:#"Project"];
NSLog(#"\n\n Result = %#",projectList
);
for (NSDictionary* project in projectList)
{
NSString *content = [project objectForKey:#"ProjectId"];
NSLog(#"\n Project Id =%#", content);
}

Answer 2

According to your JSON structure, your top level structure is an array, not a dictionary.
Try this:
SBJsonParser* jParser = [[SBJsonParser alloc] init];
NSArray* root = [jParser objectWithString:string];
NSDictionary* projectDictionary = [root objectAtIndex:1];
NSArray* projectInfo = [projectDictionary objectForKey:#"projectInfo"];