protected override void OnDisappearing() { if (Device.OS == TargetPlatform.iOS) { DropDownPicker.OnTapFrom -= OnTapFrom; DropDownPicker.RemoveEvents(); } this.DropHabitation.OnSelected -= DropHabitationSelected; this.DropTypeContrat.OnSelected -= DropTypeContratSelected; this.DropSecteurActivite.OnSelected -= DropSecteurActiviteSelected; this.DropSituationFamille.OnSelected -= DropSituationFamilleSelected; base.OnDisappearing(); }