Getting started with remote function calls on Spark Core

spark-request.m

- (void) makeSparkRequest {

    NSString *sparkApi = @"https://api.spark.io/v1/devices";
    NSString *deviceId = @"<YOUR_DEVICE_ID>";
    NSString *functionName = @"<YOUR_FUNCTION_NAME>"; // registered to cloud using Spark.function("FUNCTION_NAME", FUNCTION);
    NSString *accessToken = @"<YOUR_ACCESS_TOKEN>";
    
    NSURL *url = [NSURL URLWithString: [NSString stringWithFormat:@"%@/%@/%@\?access_token=%@", 
        sparkApi, 
        deviceId, 
        functionName, 
        accessToken]
    ];
    
    NSLog(@"%@", url);
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    
    [request setURL:url];
    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    
    NSError *error;
    NSURLResponse *response;
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    
    // ... do something with returned data

}