Flutter：我怎样才能将文本小部件中心放在屏幕上

Question

我需要将标题'放在中间以适应任何屏幕，我知道我可以调整框的大小以将标题移到中间，但是当使用不同的设备时尺寸肯定会改变并成为标题不同的地方。这是代码：

class NotificationDoctor extends StatelessWidget {
  TextStyles textStyles = TextStyles.HEADING;
  Texts texts;
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
      body: Container(
        decoration: BoxDecoration(
            color: Theme.of(context).primaryColorDark,
            borderRadius: BorderRadius.only(bottomLeft: Radius.circular(15.0))),
        height: 130.h,
        child: Padding(
          padding: EdgeInsets.only(top: 40.h),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Padding(
                padding: EdgeInsets.only(
                  right: 15.w,
                  top: 15.h,
                ),
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.center,
                  mainAxisAlignment: MainAxisAlignment.start,
                  children: [
                    FlatButton(
                      child: ArrowIcon(
                        arrowColor: Color(0xFFEEF4F9),
                        backgroundColor:
                            Theme.of(context).primaryColor.withOpacity(.9),
                      ),
                      onPressed: () {
                        Navigator.pop(context);
                      },
                    ),
                    // SizedBox(
                    //   width: 55,
                    // ),
                    Center(
                      child: Texts(
                        'Notifications',
                        style: TextStyles.HEADING,
                        color: Color(0xFFEEF4F9),
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    ));
  }
}

Answer 1

像这样使用填充

Padding(
      padding: EdgeInsets.symmetric(vertical: 5.h, horizontal: 3.h),
      child: Container(),
    );

在 https://pub.dev/packages/sizer

阅读更多内容

Answer 2

您只需像这样中心更改mainAxisAlignment

mainAxisAlignment: MainAxisAlignment.center,

完整代码

Row(
  crossAxisAlignment: CrossAxisAlignment.center,
  mainAxisAlignment: MainAxisAlignment.center,
  children: [
    // SizedBox(
    //   width: 55,
    // ),
    Center(
      child: Text(
        'Notifications',
      ),
    ),
  ],
),

如果您只希望标题居中，则使用 Stack 小部件并将标题小部件包装在 Align 小部件中，如下所示

Stack(
  children: [
    Padding(
      padding: const EdgeInsets.only(left: 8.0),
      child: Icon(Icons.arrow_back),
    ), // icon,
    Align(
      alignment: Alignment.center,
      child: Text(
        'Notifications',
      ),
    ),
  ],
)

Flutter：我怎样才能将文本小部件中心放在屏幕上

Flutter: How can i put the text widget center in screen

text

widget

dart

flutter

flutter-layout