iOS Code posting a JSON message to Slack using a Webhook

SlackEngine.h

- (void)postJSONToSlack {
    
    // This is the URL to your Slack team and channel
    NSMutableURLRequest *request = [NSMutableURLRequest
                                    requestWithURL:[NSURL URLWithString:@"https://hooks.slack.com/services/YOUR_SLACK_WEBHOOK_ID_HERE"]];
    
    NSDictionary *requestData = [[NSDictionary alloc] initWithObjectsAndKeys:
                                 @"Test post to NMDevs from iOS.\nSlack Webhook integration.", @"text",
                                 nil];
    
    NSError *error;
    NSData *postData = [NSJSONSerialization dataWithJSONObject:requestData options:0 error:&error];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:postData];
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    
    if (connection) {
        NSLog(@"Connection Successful");
    } else {
        NSLog(@"Connection could not be made");        
    }
}