ایکن قبل از title در appBar در flutter

 AppBar(

      leading: Builder(

        builder: (BuildContext context) {

          return IconButton(

            onPressed: () {},

            alignment: Alignment(5, 0),

            icon: Icon(EvilIcons.camera, size: 40),

          );

        },

      ),

      title: Text(

        'Instagram',

        style: TextStyle(

          fontFamily: 'LobsterTwo',

          fontSize: 30.0,

          letterSpacing: 1.0,

        ),

      ),

      actions: <Widget>[

        IconButton(

          icon: Icon(

            EvilIcons.sc_telegram,

            size: 35,

          ),

          onPressed: () {},

        ),

      ],

    ),