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FlutterでiOSのSegmented ControlのようなUIを作る

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#はじめに
業務でiOSのSegmented ControlのようなUIを作成したので、備忘録代わりにまとめてみます。
MaterialSegmentedControlを使いました.
また、よりiOSらしくするCupertinoSegmentedControlも試してみました。

#動作イメージ
スクリーンショット 2021-01-31 17.07.30.png

#実装
_currentSelectionで選択したindexを持っておきます。
disabledChildrenに値を入れると、選択不可になります。

class _OrderSelectorState
    extends State<OrderSelector> {
  int _currentSelection = 0;

  @override
  Widget build(BuildContext context) => MaterialSegmentedControl(
    children: const {
      0: Text('First'),
      1: Text('Second'),
      2: Text('Third'),
      3: Text('Fourth'),
    },
    selectionIndex: _currentSelection,
    borderColor: Colors.grey,
    selectedColor: Colors.red,
    unselectedColor: Colors.yellow,
    borderRadius: 8,
    horizontalPadding: const EdgeInsets.all(16),
    disabledChildren: const [3],
    onSegmentChosen: (int index) {
      print('selected : $index');
      setState(() {
        _currentSelection = index;
      });
    },
  );
}

#よりiOSらしく
CupertinoSegmentedControlを使った場合の動作イメージも載せておきます。
実装はほぼ同じでした。
スクリーンショット 2021-01-31 17.19.52.png

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