相关疑难解决方法(0)

示例代码

Map<String,String> gg={'gg':'abc','kk':'kojk'};

Future<void> secondAsync() async {
  await Future.delayed(const Duration(seconds: 2));
  print("Second!");
  gg.forEach((key,value) async{await Future.delayed(const Duration(seconds: 5));
  print("Third!");
});
}

Future<void> thirdAsync() async {
  await Future<String>.delayed(const Duration(seconds: 2));
  print('third');
}

void main() async {
  secondAsync().then((_){thirdAsync();});
}

输出

Second!
third
Third!
Third!

正如你所看到的，我想用来等待地图的 foreach 循环完成然后我想打印third
预期的输出

Second!
Third!
Third!
third