How to convert CLLCoordinate2D lat/long into NSNumber - ios

Question

I'm trying to use Yelp API, and i'm trying to have the lat/long as the params for the API search. However, it does not take the type double, it only accepts Objective-C objects. Having no knowledge in Objective-C, what do you suggest the type for the parameter of lat and long be? I tried NSNumber, but when i try to turn my lat/long coordinates of type CLLocationCoordinate2D to an NSNumber that takes in a double, its value is nil
Here is my Yelp API that I am using:
- (void)queryTopBusinessInfoForTerm:(NSString *)term location:(NSString *)location latitude:(NSNumber *)latitude longitude:(NSNumber *)longitude completionHandler:(void (^)(NSDictionary *topBusinessJSON, NSError *error))completionHandler {
NSLog(#"Querying the Search API with term \'%#\' and location \'%#'", term, location);
//Make a first request to get the search results with the passed term and location
NSURLRequest *searchRequest = [self _searchRequestWithTerm:term location:location latitude:latitude longitude:longitude];
NSURLSession *session = [NSURLSession sharedSession];
[[session dataTaskWithRequest:searchRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
if (!error && httpResponse.statusCode == 200) {
NSDictionary *searchResponseJSON = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSArray *businessArray = searchResponseJSON[#"businesses"];
if ([businessArray count] > 0) {
NSDictionary *firstBusiness = [businessArray firstObject];
NSString *firstBusinessID = firstBusiness[#"id"];
NSLog(#"%lu businesses found, querying business info for the top result: %#", (unsigned long)[businessArray count], firstBusinessID);
[self queryBusinessInfoForBusinessId:firstBusinessID completionHandler:completionHandler];
} else {
completionHandler(nil, error); // No business was found
}
} else {
completionHandler(nil, error); // An error happened or the HTTP response is not a 200 OK
}
}] resume];
}
And here is the params
- (NSURLRequest *)_searchRequestWithTerm:(NSString *)term location:(NSString *)location latitude:(NSNumber *) latitude longitude:(NSNumber *)longitude {
NSDictionary *params = #{
#"term": term,
#"location": location,
#"cll": latitude,
#"cll": longitude,
#"limit": kSearchLimit
};
return [NSURLRequest requestWithHost:kAPIHost path:kSearchPath params:params];
}
And here is my current Swift method calling the Query from YelpAPi:
func yelpApi() {
var latitude = NSNumber(double: businessStreetAddress.latitude)
var longitude = NSNumber(double: businessStreetAddress.longitude)
var searchTerm: NSString = "Asian Food";
var defaultLocation: NSString = "New York"
var APISample:YPAPISample = YPAPISample();
var requestGroup:dispatch_group_t = dispatch_group_create();
APISample.queryTopBusinessInfoForTerm(searchTerm as String, location: defaultLocation as String, latitude: latitude, longitude: longitude) { (topBusinessJSON: [NSObject: AnyObject]!, error: NSError!) -> Void in
if((error) != nil) {
println("Error happened during the request" + error.localizedDescription);
} else if((topBusinessJSON) != nil) {
println("Top business info",topBusinessJSON);
} else {
println("No business was found");
}
dispatch_group_leave(requestGroup);
}
dispatch_group_wait(requestGroup, DISPATCH_TIME_FOREVER);
}

Answer 1

To convert the CLLocationCoordinate2D to NSNumber, You cannot have it in a single NSNumber. You can convert to two NSNumber objects like follows:
CLLocationCoordinate2D location; // This is the location you have.
NSNumber *latitude = [NSNumber numberWithDouble:location.latitude];
NSNumber *longitude = [NSNumber numberWithDouble:location.longitude];
with Modern ObjC you can covert as:
CLLocationCoordinate2D location; // This is the location you have.
NSNumber *latitude = #(location.latitude);
NSNumber *longitude = #(location.longitude);
and call your
NSURLRequest *searchRequest = [self _searchRequestWithTerm:term location:location latitude:latitude longitude:longitude];
Don't confuse with the variable named like location which just I have named it. because your function searchRequestWithTerm:location:latitude:longitude: is having one parameter named location which accepts NSString.
This may help you.