'Icon' was called on null

[aissahadjsaid]

════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
The following NoSuchMethodError was thrown building CurvedDrawer(dirty, dependencies: [Directionality, MediaQuery], state: _CurvedDrawerState#8b6a1(ticker inactive)):
The getter 'icon' was called on null.
Receiver: null
Tried calling: icon

The relevant error-causing widget was:
CurvedDrawer file:///D:/workspace/flutter/projects/kf_drawer/lib/main.dart:75:18
When the exception was thrown, this was the stack:
#0 Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
#1 _CurvedDrawerState.build. (package:curved_drawer/curved_drawer.dart:180:34)
#2 MappedListIterable.elementAt (dart:_internal/iterable.dart:417:29)
#3 ListIterable.toList (dart:_internal/iterable.dart:221:19)
#4 _CurvedDrawerState.build (package:curved_drawer/curved_drawer.dart:182:22)

[suo801]

i had the same question,and had emil writer

[suo801]

by the way have you resolved this ?

[undrbridge]

I have not, been working on other items. I'll address when when I get a chance.

…

Sent from my iPhone On Mar 27, 2020, at 10:40 AM, suo801 <[email protected]> wrote:  by the way have you resolved this ? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub<#1 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AOM2REGX3NE4KGLH3CB7MWTRJTCFHANCNFSM4KVHVSLA>.

[suo801]

Thank you. I will keep an eye on the results. And I'm working on it myself

[suo801]

wow,i just resolved.i made it! 我去掉了列表赋值
// _items = widget.items.map((item) {
// DrawerNavItem(
// icon: item.icon,
// label: item.label,
// color: widget.labelColor,
// background: widget.buttonBackgroundColor,
// size: widget.width / 3,
// );
// }).toList();
下面直接用widget.items，而不用_items，因为这里循环赋值有问题。

[AbdulrhmanAlani96]

Hi there , it's not work @suo801 , do you have another solve for it ?

[vilain-corentin]

In curved_drawer.dart,
List<DrawerNavItem> _items = [];

replace to map by :

widget.items.forEach((item) {
      _items.add(DrawerNavItem(
        icon: item.icon,
        label: item.label,
        color: widget.labelColor,
        background: widget.buttonBackgroundColor,
        size: widget.width / 3,
      ));
    });

[MarcoSchneider123]

Thank you vilain-corentin, i had the same issue and this resolved my issue

[sheen404]

It isn't working. Is there any other way to solve this?

[tanzilzubair]

It isn't working, is there another way to solve this?

[Sankalp1902]

None of them are working :(

[sonOfwidgets]

#5 Put a return statement or replace it with arrow function

[sollylabs]

Please write the whole updated code.

[sollylabs]

In curved_drawer.dart,
List<DrawerNavItem> _items = [];

replace to map by :

widget.items.forEach((item) {
      _items.add(DrawerNavItem(
        icon: item.icon,
        label: item.label,
        color: widget.labelColor,
        background: widget.buttonBackgroundColor,
        size: widget.width / 3,
      ));
    });

Please write the whole code

[kamal0s]

just change code in the line just like this photo that will resolve problem
https://ibb.co/h20k2cc

[Vishesht]

This flutter dependency is showing error.
Use the Custom Curve Drawer in Flutter
Git hub Link :- https://github.com/Vishesht/Curved-Drawer-Flutter

[5hanth]

+1 #1 (comment) works well on local. can we expect this patch to get released? currently, this plugin is unusable on CI builds that download packages on app center which won't have this patch.

[gopaltalaviya]

Fixed with simple solution is that
Code:

 _items = widget.items.map((item) {
      DrawerNavItem(
        icon: item.icon,
        label: item.label,
        color: widget.labelColor,
        background: widget.buttonBackgroundColor,
        size: widget.width / 3,
      );
    }).toList();

Replace with 👍
Add return statement

_items = widget.items.map((item) {
      return DrawerNavItem(
        icon: item.icon,
        label: item.label,
        color: widget.labelColor,
        background: widget.buttonBackgroundColor,
        size: widget.width / 3,
      );
    }).toList();