FourSquare request returns null string in iOS - iphone

Question

I have looked everywhere and can't seem to find a solution. I am using ASIHTTPRequest to tap into the FourSquare API in my iOS app. However, when I try to print the JSON string that I expect to be returned to me, I am getting "null". If I navigate to the same request URL in a browser, I get a whole slew of JSON. Here is my code...
- (void)fetchFoursquareLocationsUsingLocation:(CLLocation *)location {
// First, let's build our request
CLLocationDegrees latitude = location.coordinate.latitude;
CLLocationDegrees longitude = location.coordinate.longitude;
NSString *foursquareURLString = [NSString stringWithFormat:#"https://api.foursquare.com/v2/venues/search?ll=%0.6f,%0.6f&client_id=%#&client_secret=%#&v=20120103",
latitude,
longitude,
FOURSQUARE_CLIENT_ID,
FOURSQUARE_CLIENT_SECRET];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:foursquareURLString]];
self.foursquareData = [[NSMutableData alloc] init];
request.delegate = self;
[request startAsynchronous];
}
#pragma mark - ASIHTTPRequest Delegate
- (void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data {
[self.foursquareData appendData:data];
}
- (void)requestFinished:(ASIHTTPRequest *)request {
NSString *jsonCheck = [[NSString alloc] initWithData:self.foursquareData encoding:NSUTF8StringEncoding];
NSLog(#"%#", jsonCheck);
}
UPDATE: Thanks to #Kamarshad's SO post How to get Venues list Using FourSquare Api, I was able to get valid JSON back. The difference being I made the request asynchronously such that
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:foursquareURLString]];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[NSURLConnection sendAsynchronousRequest:request
queue:queue
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
//
if (error != nil) {
NSLog(#"Something went wrong...%#", [error localizedDescription]);
}
else {
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"%#", jsonString);
}
}];
What is it about the ASIHTTPRequest that keeps a valid response from coming back??

Answer 1

This is happenning beacuse your are not passing the the V(date) value correctly at the time of Request you just pass the static(old) which may not work after that date.
You will have to pass the Updated(current) V(date) in URL String i.e V should be the CurrentDate in which you are makingRequest to FourSquare.
Try Below Code and Use again.
Update: One Thing More You should pass some thing to be search
Because in your Request you are not passing any search query
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc]init] autorelease];
[dateFormatter setDateFormat:#"YYYYMMdd"];
NSString *dateString = [dateFormatter stringFromDate:currDate];
//dateString it;s used for being UpTodate for API request
NSString* rest=#"street"
// To be Search
MakeRequest As Below and Rest of The Code will be same as you used.
NSString *foursquareURLString = [NSString stringWithFormat:#"https://api.foursquare.com/v2/venues/search?ll=%0.6f,%0.6f&client_id=%#&client_secret=%#&v=%#&query=%#",
latitude,
longitude,
FOURSQUARE_CLIENT_ID,
FOURSQUARE_CLIENT_SECRET,dateString,rest];
//Convert the Special characters into escapes.
foursquareURLString =[foursquareURLString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:foursquareURLString]];
//Rest will be same
For More Detail About the FourSquare API endpoints go Through This Link
I Hope It'll give you the Correct Result Instead of the Null !!!!!!!.