颤动，如何在图像底部放置按钮？

Question

我正在图像上创建按钮，我想要图像底部中心的按钮

Widget buildBody() {
  return Stack(
    children: <Widget> [
      Image(
        image: new AssetImage('assets/homebg.png'),
      ), 
      Center(
        child:  RaisedButton( 
          onPressed: () => launch("tel://21213123123"),
          child: new Text("Call me")
        )
      ),
    ]
  );     
}

我希望按钮的输出应该在图像的底部

Answer 1

尝试添加 alignment

Stack(
    alignment: Alignment.bottomCenter,
    children: <Widget>[
      Image(
        image: new AssetImage('assets/homebg.png'),
      ),
      Padding(
          padding: EdgeInsets.all(8.0),
          child: RaisedButton(
              onPressed: () => launch("tel://21213123123"),
              child: new Text("Call me")
          )
      ),
    ]
);