使用setInterval方法并要求jQuery替代 [英] Usage of setInterval method and asking for jQuery alternate

问题描述

window.setInterval("moveUp(fire,2)","100");

是一个代表div的对象.我想将此对象传递给moveUp方法并连续调用此方法.

in the code above fire is a object represting a div. I want to pass this object to moveUp method and call this method continuosly.

我的问题是window.setInterval不接受像这样的射击对象，并且由于未定义射击而给出错误.虽然我也在其他地方使用火物体.除此之外，我还想知道我是否可以使用jQuery做同样的事情.

My problem is window.setInterval does not accepts fire object like this and gives error as fire is not defined. Although i am using fire object at other places as well. Besides this i also want to know if i can do the same using jQuery.

推荐答案

如果将字符串传递给setInterval，则它将在全局范围内被eval ed.不要那样做而是传递一个函数，并保留现有范围.

If you pass a string to setInterval then it will be evaled in the global scope. Don't do that. Pass a function instead, and keep the existing scope.

var fire = something;
var func = function () { 
    moveUp(fire, 2); 
};
setInterval(func,100);

除此之外，我还想知道我是否可以使用jQuery做同样的事情.

Besides this i also want to know if i can do the same using jQuery.

jQuery只是一个JavaScript库.这不是另一种语言.它没有基本JavaScript的替代品.

jQuery is just a JavaScript library. It isn't a different language. It doesn't have alternatives for basic JavaScript.

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