如何取消Future.delayed？ [英] How do I cancel Future.delayed?

问题描述

如何取消/停止Future.delayed？我读了另一个问题：如何取消Future.delayed函数调用，有人回答了这个可能的解决方案： https://dart.academy/how_cancel_future/ ，但是我不知道如何在我的代码中使用它，没有像示例一样的数据列表，我只是不希望在某些情况下执行Future.delayed内部的代码。

How can I cancel/stop a Future.delayed? I read this other question: how can i cancel Future.delayed function calling and someone answered with this possible solution: https://dart.academy/how_cancel_future/, but I don't know how to use it in my code, I don't have a List of Data like the example, I just don't want the code inside the Future.delayed be executed in certain case.

await Future.delayed(Duration(seconds: myDuration)).then((_){

  checkAnswer("");
  jumpToNextQuestion();

});

推荐答案

使用计时器。

  Timer t = Timer(Duration(seconds: myDuration), () {
    checkAnswer('');
    jumpToNextQuestion();
  });
  // and later, before the timer goes off...
  t.cancel();

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