javascript / d3 - 将参数传递给函数 [英] javascript / d3 - passing parameters to a function

问题描述

我使用一个名为d3的javascript库，以便对一个对象执行一些动画。在每个动画的结尾，我想调用一个函数，它从调用动画的对象传递数据，但它不工作。如何完成这个？这是我的代码：

I'm using a javascript library called d3 in order to perform some animations on an object. At the end of each animation I want to call a function which is passed data from the object which called the animation, but it's not working. How do I accomplish this? Here's my code:

function selectArcs() {
    d3.selectAll("g.arc > path")
        .each(arcTween)
}


function arcTween(d,i){
    console.log(i); //registers as 0, then 1

    d3.select(this)
        .transition().duration(1000)
        .attrTween("d", tweenArc({ init : d.value }))
        .each("end",function(i){ console.log(i); }); //registers as 0, then 0 - should be 0, then 1
}

推荐答案

在 function（i）{console.log（i）; } 你正在调用参数 i ，但实际上通常被称为 d ！

In function(i){ console.log(i); } You're calling the parameter i but it's actually what would commonly be called d!

尝试用 function（dOrWhatever）{console.log（i）; } （这应该从函数arcTween（d，i）获得 i

Try replacing it with function(dOrWhatever){ console.log(i); } (this should get the i variable from function arcTween(d,i))

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