如何取消/放弃滚动功能？

Question

我有一个像这样的窗口滚动功能:

function fixDiv() {
//scroll script goes here
}
$(window).scroll(fixDiv);

现在我想在单击按钮时取消该功能

$('button').on('click',function(){
//cancel the fixDiv() function
// I have tried this:
fixDiv != fixDiv; // and changed/set variable for fixDiv() like var fixDiv = function(){}
});

但似乎没有用.我可以用什么方法取消该功能.

(请注意:如果再次单击应该再次运行的按钮)

---

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Answer 1

尝试类似的东西:

DEMO

$('button').on('click', function () {
    this.off = !this.off;
    $(window)[this.off?'off':'on']("scroll", fixDiv )
});

UPDATE

现在,如果要覆盖函数本身,可以使用以下代码:

//using anonymous function as handler, code inside is processing on the fly
$('#anchorAnonymous').on('click',function(){
    fixDiv();
    //any other code, still be called even fixDiv() is overrided...
});
//click to override fixDiv() function
$('#btnoverride').on('click', function () {
    this.override = !this.override;
    //$.noop = function(){} -> do nothing
    fixDiv = this.override?$.noop:storedFixDiv;
});
//this is used to store fixDiv() function
window.storedFixDiv = fixDiv;

注意,如果用作引用方法,则覆盖函数不会覆盖处理程序.因为jQuery将为存储的每个事件创建一个处理程序$._data(elem,"events").为了说明它,请参阅jsfiddle的不同之处:

jsFiddle例子