Flutter ConvexAppBar如何更改文本样式？

Question

当我尝试更改 TextStyle 时，它​​显示“参数类型“文本”无法分配给参数类型“字符串”。” 我怎样才能改变它？

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1. 我正在使用凸面底部栏 3.0.0
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2. 如果我犯了错误，请原谅我的英语
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 bottomNavigationBar: ConvexAppBar(\n          items: [\n            TabItem(icon: Icons.touch_app_rounded, title: Text("Tab1",style: TextStyle(fontFamily: "iransans"),)),\n            TabItem(icon: Icons.store_rounded, title: 'Ma\xc4\x9faza'),\n            TabItem(icon: Icons.developer_board_rounded, title: 'Sim\xc3\xbclasyon'),\n            TabItem(icon: Icons.timeline_rounded, title: '\xc4\xb0statistik'),\n            TabItem(icon: Icons.view_week_rounded, title: 'Di\xc4\x9fer'),\n          ],\n          gradient: LinearGradient(\n            colors: [Color(0xFFEC407A),\n              Color(0XFF1A237E)],\n            begin: Alignment.bottomCenter,\n            stops: [\n              0.0,0.4\n            ],\n            end: Alignment.topCenter,\n          ),\n          height: 70,\n          backgroundColor: Color(0xFFEC407A),\n          //backgroundColor: Colors.white,\n          activeColor: Colors.white,\n          initialActiveIndex: 0,//optional, default as 0\n          onTap: (int i) => print('click index=$i'),\n        ),\n

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Answer 1

//Don't use Text () and use the StyleProvider Widget in your bottomNavigationBar. In 
//TextStyle add fontFamily.

bottomNavigationBar: StyleProvider(    
  style: Style(),
  child: ConvexAppBar(
    initialActiveIndex: 1,
    height: 50,
    top: -30,
    curveSize: 100,
    style: TabStyle.fixedCircle,
    items: [
      TabItem(icon: Icons.link),
      TabItem(icon: Icons.import_contacts),
      TabItem(title: "2020", icon: Icons.work),
    ],
    backgroundColor: _tabBackgroundColor,
  ),
)
class Style extends StyleHook {
  @override
  double get activeIconSize => 40;

  @override
  double get activeIconMargin => 10;

  @override
  double get iconSize => 20;

  @override
  TextStyle textStyle(Color color) {
    return TextStyle(fontSize: 20, color: color);
  }
}