jQuery的范围是each（）函数吗？ [英] Scope of jQuery each() function?

问题描述

我正在使用jQuery ColorPicker小部件 - 专门运用ColorPickerSetColor函数（内部只是'setColor'）。代码摘录：

I'm working with the jQuery ColorPicker widget - specifically exercising the ColorPickerSetColor function (just 'setColor' internally). Code excerpt:

        setColor: function(col) {
            if (typeof col == 'string') {
                col = HexToHSB(col);
            } else if (col.r != undefined && col.g != undefined && col.b != undefined) {
                col = RGBToHSB(col);
            } else if (col.h != undefined && col.s != undefined && col.b != undefined) {
                col = fixHSB(col);
            } else {
                return this;
            }
            return this.each(function(){
                if ($(this).data('colorpickerId')) {
                    var cal = $('#' + $(this).data('colorpickerId'));
                    cal.data('colorpicker').color = col;
                    cal.data('colorpicker').origColor = col;
                    fillRGBFields(col, cal.get(0));
                    fillHSBFields(col, cal.get(0));
                    fillHexFields(col, cal.get(0));
                    setHue(col, cal.get(0));
                    setSelector(col, cal.get(0));
                    setCurrentColor(col, cal.get(0));
                    setNewColor(col, cal.get(0));
                }
            });
        }

似乎小部件中存在错误。在每个（）调用内部检查时，'col'参数未定义。我已经阅读了文档和其他示例，我可以找到的所有内容表明，当每个（）调用执行函数时，'col'仍应在范围内，但它似乎不是......

It seems that there is a bug in the widget. The 'col' parameter, when inspected inside of the each() call, is undefined. I've read the documentation and other examples, and everything I can find indicates that 'col' should still be in scope when the each() call executes the function, but it doesn't seem to be...

帮助？

谢谢！

推荐答案

我最后在一个已知良好的范围（setColor函数的父级）中使用了一个临时变量。绝对是一个黑客，但它的工作原理。如果有人知道如何以正确的方式解决这个问题，请告诉我。 ：）

I just ended up using a temporary variable in a known-good scope (the parent of the setColor function). Definitely a hack, but it works. If anyone knows how to fix this the right way, please let me know. :)

谢谢！
-Rich

Thanks! -Rich

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