dh_picker 选择器控件

num_picker 数字选择器

max 最大值

min 最小值

interval 间隔值

indexFormat 格式化函数，可以格式化每项

NumberPicker(
    max: 21,
    min: 1,
    interval: 2,
    indexFormat: (value) => "$value+",
    itemExtent: 40,
    onSelectedItemChanged: (value) {
      print('selected  value: $value');
    },
    labelAlignment: Alignment.center,
    label: Text("℃"),
    labelPadding: EdgeInsets.only(left: 50, bottom: 16),
  ),
)

string_picker 字符串选择器

StringPicker(
    itemExtent: 40,
    data: ['Apple', 'Bob', 'Cat'],
    onSelectedItemChanged: (String value) {
      print('selected  value: $value');
    },
  )

date_picker 日期时间选择器，参考flutter_date_picker

pickerOverlay 选择器上面覆盖层，通常用于自定义selectionOverlay。

每个选择器都可以设置selectionOverlay，可能达不到逾期效果，通过设置pickerOverlay 解决，注意设置selectionOverlayBuilder: (int index) => null

showPicker(context, builder: (BuildContext context) {
  return DateTimePickerWidget(
    onConfirm: (DateTime dateTime) {
      selectTime = dateTime;
      print('date time: $dateTime');
    },
    title: "选择日期",
    titleActionTheme: TitleActionTheme(
      decoration: ShapeDecoration(
          color: Colors.white,
          shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.only(
                  topLeft: Radius.circular(10.0),
                  topRight: Radius.circular(10.0)))),
    ),
    onCancel: () {
      print('取消了');
    },
    pickerTheme: PickerTheme(
      height: 180.0,
    ),
    pickerModel: DateTimePickerModel(
      maxTime: DateTime(2022, 12, 1, 5, 6),
      minTime: DateTime(2020, 11, 2, 3, 4),
      currentTime: selectTime,
    ),
    pickerOverlay: Row(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        SizedBox(
          width: 18,
        ),
        Expanded(
            child: DefaultSelectionOverlay(
          borderColor: Colors.red,
        )),
        SizedBox(
          width: 27,
        ),
        Expanded(
            child: DefaultSelectionOverlay(
          borderColor: Colors.red,
        )),
        SizedBox(
          width: 27,
        ),
        Expanded(
            child: DefaultSelectionOverlay(
          borderColor: Colors.red,
        )),
        SizedBox(
          width: 18,
        ),
      ],
    ),
    selectionOverlayBuilder: (int index) => null,
  );
});