update method

  1. @override
void update(
  1. covariant ListView newWidget
)
override

Change the widget used to configure this element.

The framework calls this function when the parent wishes to use a different widget to configure this element. The new widget is guaranteed to have the same runtimeType as the old widget.

This function is called only during the "active" lifecycle state.

Implementation

@override
void update(ListView newWidget) {
  // We call `markNeedsBuild()` on the render object even if the itemBuilder
  // hasn't changed because the item builder might produce a different widget
  // even though the builder itself hasn't changed.
  renderObject.markNeedsBuild();
  super.update(newWidget);
}