ETA:我不认为这个问题是所链接问题的重复。我知道如何返回私有变量(如下代码所示),这个问题是关于如何在同一对象内调用私有函数的。

我在查找有关javascript的相关信息时遇到了麻烦。我声明了一个对象,并且在该对象中声明了四个函数(三个是对象方法,一个不是),我想使第四个成为对象方法,以便可以与jquery(timer.displayTime)分开调用();),但是当我执行startIntervalTimer时,该功能的使用将停止工作。我要做什么甚至有可能吗?

var startStopTime = function() {

 //This function is currently called inside startIntervalTimer();
 function displayTime() {
    //Display correct time
  };

//I WANT SOMETHING LIKE THIS INSTEAD BUT (SEE startIntervalTimer)
this.displayTime = function() {
//Display correct time
}

  var intervalTimer;
  this.startIntervalTimer = function() {
    console.log(timeSetMS);
    intervalTimer = setInterval(function() {
      if(timeSetMS > 0) {
       timeSetMS -= 1000;
      displayTime(); //THIS IS WHERE AND HOW IT IS CALLED
      this.displayTime(); //THIS IS WHAT I'M GOING FOR, BUT IT WON'T WORK
      console.log(timeSetMS);
      } else if(timeSetMS <= 0) {
        clearInterval(intervalTimer);
        console.log("timer stopped");
      }
    }, 1000
    );
  }
};


然后在jQuery中,我有:

var timer = new startStopTime();
$("#timer-container,  #timer-label").click(function() {
    if(power == "off") {
      power = "on";
      timer.startIntervalTimer();
    } else if (power == "on") {
      power = "off";
      timer.stopTimer();
    }
   });

//I want to add this, below

$("#session-length").click(function() {
    //Change the display
    timer.displayTime();
    displayTime(); // This won't work obviously because it's out of scope
  });

最佳答案

您可以在对象内部声明另一个变量,即。 self

var startStopTime = function() {
  //declare self
  var self = this;

  this.displayTime = function() {
  //Display correct time
  }

  var intervalTimer;
  this.startIntervalTimer = function() {
    console.log(timeSetMS);
    intervalTimer = setInterval(function() {
      if(timeSetMS > 0) {
       timeSetMS -= 1000;
      displayTime();
      self.displayTime(); // use self instead
      console.log(timeSetMS);
      } else if(timeSetMS <= 0) {
        clearInterval(intervalTimer);
        console.log("timer stopped");
      }
    }, 1000
    );
  }
};

关于javascript - 我可以从同一对象javascript中调用私有(private)函数吗,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/41367775/

10-12 00:20
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