CODEWITHSUNDEEP
flutterdartflutter-dependencies
prushoth07
prushoth07

Reputation: 151

type 'RenderSliverList' is not a subtype of type 'RenderBox' in type cast - Flutter

Hi guys i want to implement flutter popover plugin i just copied the code and paste into my project as given in popover plugin link

https://pub.dev/packages/popover

but i got this error when i click the popover function

type 'RenderSliverList' is not a subtype of type 'RenderBox' in type cast

in debugMode it show error line is

final box = widget.context.findRenderObject() as RenderBox;

Upvotes: 2

Views: 5023

Answers (4)

Muhammad Issa Sabbagh
Muhammad Issa Sabbagh

Reputation: 87

According to @Lulupointu answer, I try to add a builder to get a different context

Builder(builder: (context) {
  return IconButton(
      onPressed: () async {
        final box = context.findRenderObject() as RenderBox?;

        await Share.share(
          subject.title.toString(),
          sharePositionOrigin:
              box!.localToGlobal(Offset.zero) & box.size,
        );
      },
      icon: const Icon(
        Icons.share_outlined,
        color: Colors.white,
      ));
}),

Upvotes: 1

us_david
us_david

Reputation: 4917

This problem seems related to the other Stack Overflow question which is also about using the flutter popover package. I have an answer for it and I am referring people to look at the answer here:

Type 'RenderSliverList' is not a subtype of type 'RenderBox' in type cast

Basically you need to wrap the triggering widget ( button/textbutton/iconbutton etc.) into a class so the widget's context will be used by the popover menu items to make the popover appears at the click point of the trigger button (widget).

Upvotes: 1

jakac13
jakac13

Reputation: 74

I just had to change the findRenderObject() to findAncestorRenderObjectOfType().

This fixed my problem. Using findAncestorRenderObjectOfType() allowed me to find the nearest ancestor of the correct type, which solved the problem.

Upvotes: 2

Lulupointu
Lulupointu

Reputation: 3584

You are using the context of a RenderSliverList (most certainly something like SliverListDelegate context).

The issue is that this context is inside a scrolling view, so it's render object is not a RenderBox but a RenderSliver.

This is important because they don't use the same constraints, which is what you want here.

The solution is to use a different context, use the one of your build method for example and it should work.

Upvotes: 6

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