arcgis runtime for iOS100.0 加载地图 按坐标加载点 objective-c实现

//加载地图
AGSArcGISTiledLayer *layer2=[AGSArcGISTiledLayer ArcGISTiledLayerWithURL:[NSURL URLWithString:@"http://services.arcgisonline.com/ArcGIS/rest/services/Reference/World_Transportation/MapServer"]];
self.map=[[AGSMap alloc]initWithBasemap:[AGSBasemap basemapWithBaseLayer:layer2]];
self.mapView.map=self.map;
//加载点
AGSSimpleMarkerSymbol *mySymble=[AGSSimpleMarkerSymbol simpleMarkerSymbolWithStyle:0 color:[UIColor blueColor] size:10];
AGSPoint *mapPoint = [AGSPoint pointWithX:134.568611111 y:48.2689611148 spatialReference:nil];
AGSGraphic *myGraphic = [AGSGraphic graphicWithGeometry:mapPoint symbol:mySymble attributes:nil];
AGSGraphicsOverlay *over=[[AGSGraphicsOverlay alloc]init];
[over.graphics addObject:myGraphic];
[self.mapView.graphicsOverlays addObject:over];