如果setState在build方法中调用，那么每次调用setState方法，都会触发build方法，进而导致无限循环。我们可以将setState方法放在一个异步函数中，比如Future.wait()，来避免触发无限循环。以下是代码示例：

class MyWidget extends StatelessWidget { @override Widget build(BuildContext context) { return FutureBuilder( future: loadData(), builder: (BuildContext context, AsyncSnapshot snapshot) { if (snapshot.connectionState == ConnectionState.done) { return Text('Data loaded'); } else { Future.wait([]); return CircularProgressIndicator(); } }, ); }

Future loadData() async { // here is your data loading code await Future.delayed(Duration(seconds: 2)); setState(() {}); // this will not trigger the build method return; } }