c# - Custom control / UIView in Xamarin.iOS with design-time properties -

i creating user interface ios app , looking correct way create reusable custom control. got working when running app, @ design time setting "exported" properties has no visible effect in designer. think doing fundamentally wrong, perhaps give me guidance

what doing:

• i have created subclass of uicontrol.
• in constructor call initialize method.
• in initialize method, add several subviews , constraints layout them within control

here hollowed out code shows above:

  [register("rangedvalueselector"), designtimevisible(true)] public sealed class rangedvalueselector : uicontrol {       public rangedvalueselector(intptr p)             : base(p)     {         initialize();     }      public rangedvalueselector()     {         initialize();     }      public int horizontalbuttonspacing     {         { return _horizontalbuttonspacing; }         set         {             _horizontalbuttonspacing = value;         }     }       [export("labelboxverticalinset"), browsable(true)]     public int labelboxverticalinset     {                 {             return _labelboxverticalinset;         }          set         {             _labelboxverticalinset = value;         }     }        private void initialize()     {         //code creates , add subviews         //code creates , add required constraints, of should depend on design time properties     } } 

so control works fine if set exported properties via designer, not have immediate effect in designer itself.

what suggested way of having design-time settable properties change constraint values? avoid having recreate subviews each time in code or in designer sets property.