无法修改 MovieClip 过滤器 属性

Question

我对 MovieClip 应用了斜角滤镜。稍后在我的代码中，当我尝试更改过滤器 属性 时，它似乎不起作用。

这是我的代码：

for (var i: int = 0; i < myMovieClip.filters.length; i++) {
    if (myMovieClip.filters[i] is BevelFilter) {
        trace("done");
        myMovieClip.filters[i].highlightColor = 0xFF0000;
        myMovieClip.filters[i].shadowColor = 0x0000FF;
        break;
    }
}

Answer 1

根据 adobe 的指南：Graphic Effects Learning Guide for Flash: Filters

Each filter has a set of properties unique to it. The filters can be accessed and modified just like a regular array object, although getting and setting the filters using the filters property returns a duplicate of the filters object instead of a reference.

// This will not work
my_mc.filters[0].blurX = 20;

Because the previous code snippet returns a copy of the filters array, it modifies the duplicate. In order to modify the blurX property, you need to use the following ActionScript code instead:

// This will work
var filterList:Array = my_mc.filters;
filterList[0].blurX = 20;
my_mc.filters = filterList;

看来您需要将代码更改为如下内容：

var filtersList:Array = myMovieClip.filters;
for (var i: int = 0; i < filtersList.length; i++) {
  if (filtersList[i] is BevelFilter) {
    trace("done");
    filtersList[i].highlightColor = 0xFF0000;
    filtersList[i].shadowColor = 0x0000FF;
    myMovieClip.filters = filtersList;
    break;
  }
}