Javascript setInterval函数清除自己？ [英] Javascript setInterval function to clear itself?

问题描述

myInterval = setInterval(function(){
     MyFunction();
},50);

function MyFunction()
{
    //Can I call clearInterval(myInterval); in here?
}

如果我编码的是，间隔不会停止（不会被清除）上面没问题，那么它会帮我看看其他原因造成的问题。谢谢。

The interval's not stopping (not being cleared), if what I've coded above is fine then it'll help me look elsewhere for what's causing the problem. Thanks.

编辑：我们假设它在调用clearInterval之前完成了几个时间间隔，这样就不再需要setTimeout。

Let's assume it completes a few intervals before clearInterval is called which removes the need for setTimeout.

推荐答案

只要你有保存的 interval 变量的范围，就可以从任何地方取消它。

As long as you have scope to the saved interval variable, you can cancel it from anywhere.

在子范围内：

var myInterval = setInterval(function(){
     clearInterval(myInterval);
},50);

在兄弟范围内：

var myInterval = setInterval(function(){
     foo();
},50);

var foo = function () {
    clearInterval(myInterval);
};

如果超出范围，你甚至可以通过间隔：

You could even pass the interval if it would go out of scope:

var someScope = function () {
    var myInterval = setInterval(function(){
        foo(myInterval);
    },50);
};

var foo = function (myInterval) {
    clearInterval(myInterval);
};

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