requestFocus method

*<Null safety>*

Future<void> requestFocus (int viewRef)

Implementation

Future<void> requestFocus(int viewRef) async {
  final args = <String, dynamic>{
    'viewRef': viewRef,
  };
  final result =
      await platformViewChannel.invokeMethod('View.requestFocus', args);
  // Throw OSError if result is non-zero.
  if (result != 0) {
    throw OSError(
      'Failed to request focus for view: $viewRef with $result',
      result,
    );
  }
}