如何在地图视图中添加多个注释

Question

我必须在地图视图中显示5个点（在Array中）。我在我的日志中显示了Array值.Loop运行完美，并且没有添加注释。这是我的代码：

            self.mapView.delegate = self
            self.mapView.mapType = MKMapType.standard
            self.mapView.isZoomEnabled = true
            self.mapView.isScrollEnabled = true
            self.mapView.showsUserLocation = true

        print("LOCATION LIST==>>")
        print(items["Location"].arrayValue)

        for locationList in items["Location"].arrayValue
        {
            print(locationList)

            let annotation = MKPointAnnotation()
            annotation.coordinate = CLLocationCoordinate2D(latitude: locationList["latitude"].doubleValue, longitude: locationList["longitude"].doubleValue)
            self.mapView.addAnnotation(annotation)    
        }

        self.mapView.delegate = self

日志：

LOCATION LIST==>>
{
  "Latitude" : 12.988415,
  "Longtitude" : 80.218386
}, {
  "Latitude" : 12.988445,
  "Longtitude" : 80.21839199999999
}, {
  "Latitude" : 12.988492,
  "Longtitude" : 80.218422
}, {
  "Latitude" : 12.988558,
  "Longtitude" : 80.218461
},  
{
  "Latitude" : 12.991181,
  "Longtitude" : 80.21950200000001
}

但它没有在我的地图View.Thanks中显示Annotations。