Discord.js 机器人更新活动 [重复]

Question

我想在我的 BOT 上创建一个包含各种活动的更新状态。这是我到目前为止所做的代码：

const activities = [
        {
            type : "PLAYING",
            activity : "with the ball"
        },
        {
            type : "WATCHING",
            activity : "your soul"
        }
    ];

    for (var i = 0; i < activities.length; i++) {
        setInterval(() => client.user.setActivity(`${activities[i].activity}`, { type: `${activities[i].type}` }));
    };

当我尝试启动 BOT 时，终端显示

TypeError: 无法读取未定义的属性“活动”

可能代码完全错误，但我不太擅长 javascript。有什么建议吗？

Answer 1

setInterval 将强制执行异步操作，但堆栈值仅在循环上下文中有效，因为它是一个指针。您可以先创建另一个变量，javascripts垃圾收集器会注意到“哦，我无法清理这个，我稍后需要它”，所以javascript在他的堆栈中仍然有这个值

for (var i = 0; i < activities.length; i++) {
    var putonstack = activities[i];
    setInterval(() => client.user.setActivity(`${putonstack.activity}`, { type: `${putonstack.type}` }));
};

您也可以通过这样的迭代来完全避免这种情况：

// for (var i = 0, value; value = activities[i]; i++)
for (var value of activities) {
    setInterval(() => client.user.setActivity(`${value.activity}`, { type: `${value.type}` }));
};

并解决您的要求：

const activities = [
      {
          type : "PLAYING",
          activity : "with the ball"
      },
      {
          type : "WATCHING",
          activity : "your soul"
      }
  ];
  
  const timeoutForNms = 10000; // 10 seocnds
  let currentActivity = 0;
  setInterval(() => {
  console.log('set activity to %s type to %s', activities[currentActivity].activity, activities[currentActivity].type);
  client.user.setActivity(`${activities[currentActivity].activity}`, { type: `${activities[currentActivity].type}` });
  currentActivity++;
  if (currentActivity === activities.length) {
      currentActivity = 0;
  }
  }, timeoutForNms);