how is the code for parsing Json parsing? - iphone

Question

Hi I have implemented code for parsing the below response as follows but it is not working properly:
NSString *req = [NSString stringWithFormat: #" My URL"];
NSDictionary *googleResponse = [[NSString stringWithContentsOfURL: [NSURL URLWithString: req] encoding: NSUTF8StringEncoding error: NULL] JSONValue];
NSDictionary *resultsDict = [googleResponse valueForKey: #"eventtitle"];
What is the code for parsing the below response? Please give me solution.
{
"AlansHarleyEvents": [
{
"id": "3",
"eventtitle": "22nd Annual Pig Roast",
"eventdate": "April 22nd 8am-5pm"
},
{
"id": "4",
"eventtitle": "Poker Run",
"eventdate": "April 28th 8am at Shooters"
},
{
"id": "5",
"eventtitle": "Kickstands for kids",
"eventdate": "May 12th 8am-5pm"
},
{
"id": "6",
"eventtitle": "Ride for the Cure",
"eventdate": "May28th 8am Free Drinks!"
},
{
"id": "7",
"eventtitle": "Veterans Ride",
"eventdate": "June 10th 9am #City Hall"
},
{
"id": "8",
"eventtitle": "Biker Beach Bash",
"eventdate": "June 28th 8-5pm # The Pier"
},
{
"id": "10",
"eventtitle": "22nd Annual Pig Roast",
"eventdate": "April 22nd 8am-5pm"
},
{
"id": "11",
"eventtitle": "Poker Run",
"eventdate": "April 28th 8am at Shooters Lounge"
},
{
"id": "12",
"eventtitle": "22nd Annual Pig Roast",
"eventdate": "April 22nd 8am-5pm"
},
{
"id": "13",
"eventtitle": "Swamp Run",
"eventdate": "April 22nd 8am-5pm"
}
]
}

Answer 1

If your resultsDict contains the above JSON response then you can parse it as :
NSString *req = [NSString stringWithFormat: #" My URL"];
NSDictionary *googleResponse = [[NSString stringWithContentsOfURL: [NSURL URLWithString: req] encoding: NSUTF8StringEncoding error: NULL] JSONValue];
NSDictionary *resultsDict = [googleResponse valueForKey: #"eventtitle"];
NSMutableArray *resultArray = [resultsDict valueForKey:#"AlansHarleyEvents"];
for(int i = 0; i<[resultArray count]; i++)
{
NSLog(#"%#",[[resultArray objectAtIndex:i] valueForKey:#"id"]) ;
NSLog(#"%#",[[resultArray objectAtIndex:i] valueForKey:#"eventtitle"]) ;
NSLog(#"%#",[[resultArray objectAtIndex:i] valueForKey:#"eventdate"]) ;
}

Answer 2

NSJSONSerialization Class is the Native Class for only iOS 5 and above
http://developer.apple.com/library/ios/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html
For any iPhone OS version means you can go for JSONKit:
https://github.com/johnezang/JSONKit

Answer 3

Yu can use NSJSONSerialization object with IOS 5
NSDictionnary *jsonObject = [NSJSONSerialization JSONObjectWithData:resultsDict options:NSJSONReadingMutableContainers error:&error];