I notice the nivoslider plugin uploads images by using the nop-editor with pictureid of type int:
<nop-editor asp-for="Picture1Id" />
I tried writing a plugin that does the same thing, but my control shows up as an int textbox instead of a picture upload control.
I see in nopeditortaghelper the nivoslider controls are somehow generated as image uploads and mine aren't and I can't pinpoint what I'm doing wrong.
var htmlOutput = _htmlHelper.Editor(For.Name, Template, new { htmlAttributes, postfix = Postfix });