I'm trying to remove the default margin from persistentFooterButtons, but I can't find it because it receives a list of widgets.

I'm using extendBody: true in Scaffold.

persistentFooterButtons margin

    persistentFooterButtons: [
    Container(
      color: const Color.fromRGBO(240, 240, 240, 0.9),
      width: double.infinity,
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 2, vertical: 2),
        child: Row(
          children: [
            Expanded(
              child: GestureDetector(
                child: Column(
                  children: [
                    const Image(
                      image: AssetImage('assets/images/home.png'),
                      height: 35,
                    ),
                    Text(
                      "Início",
                      style: TextStyle(
                        fontSize: 10,
                        color: Theme.of(context).primaryColor,
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    )
  ],

CodePudding user response：

This is coming from the source code of scaffold.dart. It is defined like this.

 child: Container(
                alignment: AlignmentDirectional.centerEnd,
                padding: const EdgeInsets.all(8), //<-- this 
                child: OverflowBar(
                  spacing: 8,
                  overflowAlignment: OverflowBarAlignment.end,
                  children: widget.persistentFooterButtons!,
                ),
              ),

Another trick can be applied using transform but tap effect can be effected in this case.

Container(
  transform: Matrix4.translationValues(0, 8, 0),
   .....

Or I would say just use bottomNavigationBar on Scaffold instead of persistentFooterButtons

  bottomNavigationBar: Container(
          color: const Color.fromRGBO(240, 240, 240, 0.9),
          width: double.infinity,
          height:50, // the one prefered by your view
........