How to change icon in AppBarWidget in flutter?

Question

I have this AppBarWidget and I need to change the arrow back logo to my custom svg icon. I'm new in flutter and I can't find how to change it.

Here is code for AppBar

 return AppBar(
 elevation: 0,
 backgroundColor: white,
 foregroundColor: black,
 shadowColor: Colors.transparent,
 toolbarHeight: 80,
 titleTextStyle: getCustomeStyle(
 fontSize: 25, fontWeight: FontWeight.w700, color: black),
 title: FittedBox(
 fit: BoxFit.fill,
 child: SizedBox(
 width: _width,
 child: Row(
 mainAxisAlignment: MainAxisAlignment.spaceBetween,
 children: [
 Text(title), 
 SvgPicture.asset("assets/images//logo/ShopIO.svg",
 semanticsLabel: "ShopIO")
 ],
 ),
 )),
 bottom: PreferredSize(
 child: Container(
 color: lightGray,
 height: 1.0,
 width: _width - 30,
 ),
 preferredSize: const Size.fromHeight(0)),
 );

Answer 1

The easiest way is to override the deafult leading widget of AppBar and add your custom:

AppBar(
 leading: IconButton(
 icon: <whatever you like>,
 // this is the default behaviour, you can change it
 onPressed: () => Navigator.of(context).pop()
 ),