NullReferenceException clicking on Pin

[marcoseraphin]

Hi,

also I am getting an error after displaying another Master-Detail page and than switching back to the Map page (like the MapPins-Clear() exception.

After switching back to the Map page and clicking on a Pin I am getting this error (again clicking on the Pin the first time, before using the Master/Detail page) there is NO problem clicking the Pin):

at TK.CustomMap.iOSUnified.TKCustomMapRenderer.SetSelectedPin () [0x0004c] in :0
at TK.CustomMap.iOSUnified.TKCustomMapRenderer.OnMapPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00036] in :0
at (wrapper delegate-invoke) :invoke_void_object_PropertyChangedEventArgs (object,System.ComponentModel.PropertyChangedEventArgs)
at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00012] in :0
at TK.CustomMap.TKCustomMap.OnPropertyChanged (System.String propertyName) [0x00000] in :0
at Xamarin.Forms.BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindablePropertyContext context, System.Object value, Boolean currentlyApplying, SetValueFlags attributes, Boolean silent) [0x000fb] in :0
at Xamarin.Forms.BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes) [0x0014b] in :0
at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value, Boolean fromStyle, Boolean checkAccess) [0x0005f] in :0
at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value) [0x00000] in :0
at TK.CustomMap.TKCustomMap.set_SelectedPin (TK.CustomMap.TKCustomMapPin value) [0x00000] in :0
at TK.CustomMap.iOSUnified.TKCustomMapRenderer.OnDidSelectAnnotationView (System.Object sender, MapKit.MKAnnotationViewEventArgs e) [0x00032] in :0
at MapKit.MKMapView+_MKMapViewDelegate.DidSelectAnnotationView (MapKit.MKMapView mapView, MapKit.MKAnnotationView view) [0x00014] in /Users/builder/data/lanes/2689/962a0506/source/maccore/src/build/ios/native/MapKit/MKMapView.g.cs:1797
at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
at UIKit.UIApplication.Main (System.String[] args, IntPtr principal, IntPtr delegate) [0x00005] in /Users/builder/data/lanes/2689/962a0506/source/maccore/src/UIKit/UIApplication.cs:77
at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/builder/data/lanes/2689/962a0506/source/maccore/src/UIKit/UIApplication.cs:61
at VagaBoo.iOS.Application.Main (System.String[] args) [0x00008] in /Users/marcoseraphin/Xamarin/Xamarin/Projekte/VagaBooMobileApp/VagaBooMobileApp (trunk)/iOS/Main.cs:17

[TorbenK]

What is the exception? I think you may have a pretty odd case here. The best thing would be if you create a small repro project

[marcoseraphin]

It is also a NullReferenceException (Object reference not set to an instance of an object) in SetSelectedPin() while clicking on the Pin after switching the Master Detail page back and forth.

Making a sample report is not that easy...it needs a MasterDetail page and some other stuff. TeamViewer session is possible if needed, but of course no debugging..;-(

[TorbenK]

Thankfully we are on GitHub, you can fork the code and debug yourself. Just add the projects directly on remove the nuget package.