当我调用Meteor.setTimeout()时,流星保存当前的'this'实例,当时间到时,我调用的函数使用了它的旧实例(当我调用Meteor.setTimeout()时保存的实例)。如何使流星改用“ this”的新实例?

// Ending question
const questionEndToLog = () => this.questionEnd(firstQuestion._id);
Meteor.setTimeout(questionEndToLog, firstQuestion.time * 1000);

questionEnd(qId) {
  const addToGameLog = () => {
    const questionEnd = new QuestionEnd({
      questionId: qId
    });
    this.gameLog = this.gameLog.concat(questionEnd);
    this.save();
    return true;
  };
  const isQuestionEndAlready = !!this.gameLog
    .filter(e => e.nameType === eventTypes.QuestionEnd)
    .find(e => e.questionId === qId);
  return isQuestionEndAlready && addToGameLog();
}

export const QuestionEnd = Class.create({
  name: eventTypes.QuestionEnd,
  fields: {
    nameType: {
      type: String,
      default() {
        return eventTypes.QuestionEnd;
      },
    },
    questionId: {
      type: String,
    },
    createdAt: {
      type: Date,
      default() {
        return new Date();
      },
    },
  },
});


this.gameLog是最旧的日志(调用Meteor.setTimeout()时的日志),而不是新的日志。

最佳答案

那不是流星。当您使用() => ...时,当前的此上下文将绑定到此函数。

07-24 17:18