internal static UIView ClosestCommonAncestror(UIView a, UIView b)
{
var aSuper = a.Superview;
var bSuper = b.Superview;
if (ReferenceEquals(a, b))
{
return(a);
}
if (ReferenceEquals(a, bSuper))
{
return(a);
}
if (ReferenceEquals(b, aSuper))
{
return(b);
}
if (ReferenceEquals(aSuper, bSuper))
{
return(aSuper);
}
var ancestrorsOfA = a.Ancestrors();
foreach (var ancestror in b.Ancestrors())
{
if (ancestrorsOfA.Contains(ancestror))
{
return(ancestror);
}
}
return(null);
}