Resolving ‘Horizontal viewport was given unbounded height.’ Error with TabBarView in Flutter

If you’re encountering the ‘Horizontal viewport was given unbounded height.’ error when using TabBarView in your Flutter application, you’re not alone. This error typically occurs when the TabBarView widget doesn’t have a bounded height, causing conflicts in the layout rendering. However, you can easily resolve this issue by making a few adjustments in your code. Let’s dive into the solution!

Understanding the Error

The ‘Horizontal viewport was given unbounded height.’ error message indicates that the TabBarView widget doesn’t have a fixed height constraint. This error arises because the TabBarView is expanding horizontally to fill the available space but lacks a specific height, leading to conflicts in the layout rendering. To fix this, we need to provide a bounded height for the TabBarView.

Implementing the Solution

To resolve the error, we’ll make use of two widgets: Expanded and SizedBox. Follow these steps to implement the solution:

1. Wrap the TabBar and TabBarView widgets inside a Column widget to arrange them vertically.
2. Wrap the TabBar widget with the Expanded widget and set the flex property to give it a portion of the available height.
3. Wrap the TabBarView widget with the Expanded widget as well, ensuring it takes up the remaining portion of the available height.
4. If you want to specify a fixed height for the TabBarView, you can wrap it with a SizedBox and set the height property accordingly.

Here’s an example code snippet showcasing the solution:

code





















DefaultTabController(
  length: 3,
  child: Column(
    children: <Widget>












[
      Expanded(
        flex: 1,
        child: TabBar(
          // TabBar widgets
        ),
      ),
      Expanded(
        flex: 9,
        child: TabBarView(
          // TabBarView widgets
        ),
      ),
    ] 

,
  ),
)

By using the Expanded widget and providing flex values, we distribute the available height between the TabBar and TabBarView, ensuring they fit within the layout constraints.

Conclusion

By following these steps, you should be able to resolve the ‘Horizontal viewport was given unbounded height.’ error when using TabBarView in Flutter. Remember to wrap the TabBar and TabBarView widgets with the Expanded widget, setting appropriate flex values to allocate the desired height. Implementing this solution will allow you to create profile pages with tab views seamlessly in your Flutter applications.