介绍一款下拉框多选插件

multi_select_flutter: ^4.0.0
https://github.com/CHB61/multi_select_flutter

使用

class SelectMoreDropDemo extends StatefulWidget {
  const SelectMoreDropDemo({Key key}) : super(key: key);

  @override
  _SelectMoreDropDemoState createState() => _SelectMoreDropDemoState();
}

class _SelectMoreDropDemoState extends State<SelectMoreDropDemo> {
  List<Elements> _element = [
    Elements(id: 1, name: "A"),
    Elements(id: 2, name: "B"),
    Elements(id: 3, name: "C"),
    Elements(id: 4, name: "D"),
    Elements(id: 5, name: "E"),
    Elements(id: 6, name: "F"),
    Elements(id: 7, name: "G"),
    Elements(id: 8, name: "H"),
  ];
  

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Container(
        child: Column(
          children: [
            SizedBox(height: 40),
            MultiSelectDialogField(
              items: _element
                  .map((animal) => MultiSelectItem<Elements>(animal, animal.name))
                  .toList(),
              title: Text("demo"),
              selectedColor: Colors.blue,
              cancelText: Text('取消'),
              confirmText: Text('确定'),
              decoration: BoxDecoration(
                color: Colors.blue.withOpacity(0.1),
                borderRadius: BorderRadius.all(Radius.circular(40)),
                border: Border.all(
                  color: Colors.blue,
                  width: 2,
                ),
              ),
              buttonIcon: Icon(
                Icons.pets,
                color: Colors.blue,
              ),
              buttonText: Text(
                "demo",
                style: TextStyle(
                  color: Colors.blue[800],
                  fontSize: 16,
                ),
              ),
              onConfirm: (item) {
                
              },
            ),
          ],
        ),
      ),
    );
  }
}
class Elements {
  final int id;
  final String name;

  Elements({
    this.id,
    this.name,
  });
}

本文只介绍了其中一款基本样式，喜欢其他样式的可以Git查阅下