看了一下提问有类似的问题但是也没有解答，下面是我的源码，仿插件example写的

class _LaunchPageState extends State<LaunchPage> {
  Future<void>? _launched;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('如何打开第三方应用'),
        leading: GestureDetector(
          onTap: () {
            Navigator.pop(context);
          },
          child: Icon(Icons.arrow_back),
        ),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
                onPressed: () => setState(() {
                  _launched = _launchInWebViewOrVC('https://www.baidu.com');
                }),
                child: Text('打开百度'))
          ],
        ),
      ),
    );
  }
 Future<void> _launchInWebViewOrVC(String url) async {
    if (await canLaunch(url)) {
      await launch(
        url,
        forceSafariVC: true,
        forceWebView: true,
        headers: <String, String>{'my_header_key': 'my_header_value'},
      );
    } else {
      throw 'Could not launch $url';
    }
  }

按了没反应，debug要怎么做，打个断点吗