flutter - 如何修复颤振飞镖中的字符串参数？

Question

“参数类型'字符串？' 不能分配给参数类型“字符串”。",

Route<dynamic>  generateRoute(RouteSettings settings)  {
    switch (settings.name) {
        case HomeRoute:
          return _getPageRoute(HomeView(),settings.name);
        case AboutRoute:
          return _getPageRoute(AboutView(),settings.name);
        case SwishTokenRoute:
          return _getPageRoute(SwishToken(),settings.name);
        default: 
        throw "route not found!";
    }

}

标签： flutterdart

Answer 1

默认情况下，您没有放置返回关键字来说明其显示错误的原因。