didUpdateWidget method

  1. @override
  2. @mustCallSuper
void didUpdateWidget(
  1. covariant T oldWidget
)
inherited

Override this method to respond when its StatefulWidget is re-created. The framework always calls build after calling didUpdateWidget, which means any calls to setState in didUpdateWidget are redundant.

Implementation

@override
@mustCallSuper
void didUpdateWidget(covariant T oldWidget) {
  /// No 'setState()' functions are allowed
  _setStateAllowed = false;

  for (final con in controllerList) {
    con.didUpdateWidget(oldWidget);
  }

  super.didUpdateWidget(oldWidget);

  /// Re-enable setState() function
  _setStateAllowed = true;

  /// No 'setState()' functions are necessary
  _setStateRequested = false;

  // Record the triggered event
  assert(() {
    if (_printEvents) {
      debugPrint('============ Event: didUpdateWidget() in $this');
    }
    return true;
  }());
}