title: Add webMap as layer with ArcGIS mapView for iOS app project
body: <p>I'm trying to code in a basic ArcGIS workflow into my iOS project. I am new to this platform and can use some pointers. My workflow is as follows.</p>
  
  <p>1.) Create mapView displaying satellite (world style) map.
  2.) Add a public webMap from my user account on ArcGIS Online as an overlay/layer on the satellite map. </p>
  
  <p>What I've tried</p>
  
  <pre><code>//.h
  
  #import &lt;ArcGIS/ArcGIS.h&gt;
  
  @interface ViewController : UIViewController &lt;AGSWebMapDelegate&gt;
  
  @property (strong, nonatomic) IBOutlet AGSMapView *mapView;
  
  //.m
  
  // Add basemap
  
  NSURL* url = [NSURL URLWithString:@"http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer"];
  AGSTiledMapServiceLayer *tiledLayer = [AGSTiledMapServiceLayer tiledMapServiceLayerWithURL:url];
  [self.mapView addMapLayer:tiledLayer withName:@"Basemap Tiled Layer"];
  
  //If I run this part alone, I'll get the satellite map.
  
  
  AGSWebMap* webmap = [[AGSWebMap alloc] initWithItemId:@"bb9b8c172e8142f995526bf658078f54" credential:nil];
  webmap.delegate = self;
  [webmap openIntoMapView:self.mapView];
  
  //When I add this webMap code and run the project, I get a blank white screen.
  
  
  //.m cont.
  
  - (void)mapViewDidLoad:(AGSMapView *) mapView {
  NSLog(@"mapView didLoad");    
  }
  
  - (void) webMapDidLoad:(AGSWebMap*) webMap {
  NSLog(@"webmap added successfully");
  }
  
  //Neither of these logs get called.
  </code></pre>
  
  <p>Questions. </p>
  
  <p>1.) Is it right to use AGSTiledMapServiceLayer as my basemap? Also, is it right to use AGSWebMap for my ArcGIS Online map?</p>
  
  <p>2.) My goal is to be able to add and remove multiple layers to and from a satellite basemap, one at a time. Am I on the right track?</p>
  
  <p>I'm currently using MapBox to achieve this but I'm starting to experiment with ArcGIS SDK and it's features. </p>
  
  <p>Thanks in advance.</p>