flutter runtime_error ai_generated true

RenderBox was not laid out: RenderViewport#abcde needs to have a 'size' but its constraints are 'BoxConstraints(unconstrained)'

ID: flutter/rendering-box-height-nan

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90%Fix Rate

87%Confidence

1Evidence

2023-05-12First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
3.0.0	active	—	—	—
3.10.0	active	—	—	—
3.16.0	active	—	—	—
3.22.0	active	—	—	—

A scrollable widget (e.g., ListView, GridView) is placed inside a Column or Row without being given explicit constraints, causing infinite height.

generic

可滚动小部件（例如 ListView、GridView）放置在 Column 或 Row 中，未获得显式约束，导致高度无限。

90% success Wrap the scrollable widget in an Expanded or Flexible inside a Column or Row to give it bounded constraints.
```
Wrap the scrollable widget in an Expanded or Flexible inside a Column or Row to give it bounded constraints.
```
85% success Use a CustomScrollView with slivers instead of nesting a ListView in a Column.
```
Use a CustomScrollView with slivers instead of nesting a ListView in a Column.
```
75% success Set a specific height constraint using SizedBox or Container with a height, but ensure it's enough for content.
```
Set a specific height constraint using SizedBox or Container with a height, but ensure it's enough for content.
```

Wrap the scrollable widget in an Expanded or Flexible inside a Column or Row to give it bounded constraints.

Use a CustomScrollView with slivers instead of nesting a ListView in a Column.

Set a specific height constraint using SizedBox or Container with a height, but ensure it's enough for content.

Common approaches that don't work:

40% fail
If content exceeds the fixed height, the ListView will overflow or clip; not adaptive.
35% fail
Expanded requires bounded constraints; if parent is unconstrained, it still fails.
25% fail
Does not give the ListView bounded constraints; the Column still tries to size itself to the ListView's infinite height.