11.12日笔记

用于点击外部区域关闭键盘：

FocusManager.instance.primaryFocus?.unfocus();

一次性token的控制器单例模式：

class TokenController extends GetxController {
  static TokenController get to => Get.find<TokenController>();

  String token = "";

  /// 设置token
  void set() {
    token = mock.sentence();
    update();
  }

  /// 删除token
  void delete() {
    token = "";
    update();
  }
}
Get.put(TokenController());
if (TokenController.to.token.isEmpty) {
    Get.toNamed('/login/verify-code');
}

密码登录弹出安全键盘：

TextField(
            keyboardType: TextInputType.visiblePassword, // 这个属性就行
            obscureText: true,
            enableSuggestions: false,
            autocorrect: false,
            decoration: InputDecoration(
              hintText: "请输入密码",
              contentPadding: const EdgeInsets.symmetric(
                vertical: 0,
                horizontal: 16,
              ),
              enabledBorder: OutlineInputBorder(
                borderRadius: BorderRadius.circular(8),
                borderSide: BorderSide(color: WcaoTheme.outline, width: 2),
              ),
              focusedBorder: OutlineInputBorder(
                borderRadius: BorderRadius.circular(8),
                borderSide: BorderSide(color: WcaoTheme.primaryFocus, width: 2),
              ),
            ),
          ),

底部缺口与浮动按钮联动：

Scaffold(
      body: PageView(
        controller: _pageController,
        physics: const NeverScrollableScrollPhysics(),
        children: const [
          PageViewIndex(),
          PageViewCommunity(),
          PageViewMessage(),
          PageViewMine(),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        backgroundColor: WcaoTheme.primary,
        onPressed: () {
          Get.toNamed('/publish');
        },
        child: const Icon(Icons.add),
      ),
      resizeToAvoidBottomInset: true,
      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
      bottomNavigationBar: BottomAppBar(
        shape: const CircularNotchedRectangle(), // 这里实现了一个带圆形缺口的矩形形状，
        child: Padding(
          padding: const EdgeInsets.only(top: 8),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              barItem(curPage == 0, 0, icon: Icons.home_filled, text: "首页"),
              barItem(curPage == 1, 1, icon: Icons.access_alarm, text: "社区"),
              const SizedBox(width: 48),
              barItem(curPage == 2, 2, icon: Icons.message_sharp, text: "消息"),
              barItem(curPage == 3, 3, icon: Icons.person, text: "我的"),
            ],
          ),
        ),
      ),
    );

弹出底部弹窗：

showModalBottomSheet(
          builder: (context) => const SearchDialog(),
          context: context,
          isScrollControlled: true,
        );

根据父容器组件尺寸来控制大小：

FractionallySizedBox(
      heightFactor: .9,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          appbarTitle(context),
          Expanded(
            child: SingleChildScrollView(child: SafeArea(child: body())),
          ),
        ],
      ),
    );

旋转组件：

import 'dart:math';

// 旋转45度
Transform.rotate(
  angle: 45 * pi / 180, // 将角度转换为弧度
  child: Container(
    width: 100,
    height: 50,
    color: Colors.blue,
    child: Text('旋转45°'),
  ),
)
// 以左上角为原点旋转
Transform.rotate(
  angle: pi / 4, // 45度
  origin: Offset(0, 0), // 左上角旋转
  child: Container(
    width: 100,
    height: 100,
    color: Colors.red,
  ),
)
// 自定义对齐方式
Transform.rotate(
  angle: -30 * pi / 180, // 逆时针30度
  alignment: Alignment.topRight, // 右上角对齐
  child: Icon(Icons.star, size: 50),
)
// 动画旋转
Transform.rotate(
  angle: _rotationAngle, // 可以绑定动画值
  child: CircularProgressIndicator(),
)

一组选择按钮：

group_button: ^5.3.4 // 分组按钮（Group Button）

GroupButton(buttons: sex, options: groupButtonOptions()),
/// group button 默认设置
  GroupButtonOptions groupButtonOptions() {
    return GroupButtonOptions(
      elevation: 0,
      mainGroupAlignment: MainGroupAlignment.start,
      textPadding: const EdgeInsets.symmetric(vertical: 2, horizontal: 12),
      runSpacing: 0,
      spacing: 12,
      borderRadius: BorderRadius.circular(6),
      unselectedColor: WcaoTheme.outline.withOpacity(.25),
      selectedColor: WcaoTheme.primary.withOpacity(.2),
      unselectedBorderColor: WcaoTheme.outline,
      selectedBorderColor: WcaoTheme.primary,
      unselectedTextStyle: TextStyle(
        color: WcaoTheme.base.withOpacity(.85),
        fontSize: WcaoTheme.fsSm,
      ),
      selectedTextStyle: TextStyle(
        color: WcaoTheme.primary,
        fontSize: WcaoTheme.fsSm,
      ),
    );
  }