这感觉就像一个新手问题,所以要振作起来。如何引用运行时添加的Flex元素?
我很难得到编译时使用'id'属性添加的元素的引用。我看到一些论坛话题表明这是不可能的,并且以这种方式获得对元素的引用更为棘手,但从来不仅仅是这种技巧。这段代码很有趣:Error: uncaught exception: Error calling method on NPObject! [plugin exception: "ReferenceError: Error #1069: Property canvas_tentpoles_0 not found on SGraph and there is no default value."]
。
public function calledAfterInit(graph_values:Array):void
{
for(var i:int=0; i<graph_values.length; i++) {
var cdc:CartesianDataCanvas = new CartesianDataCanvas();
cdc.id = "canvas_tentpoles_"+i;
cdc.includeInRanges = false;
cdc.visible = false;
Areachart.annotationElements = Areachart.annotationElements.concat(cdc);
// [...do stuff...]
}
// [...later...]
for(var j:int=0; j<graph_values.length; j++) {
drawOnCanvas(j);
}
}
private function drawOnCanvas(index:int):void {
var canvas:CartesianDataCanvas = this["canvas_tentpoles_"+index]; // ← Error likely from here
canvas.lineStyle(1);
canvas.moveTo(10,10);
canvas.lineTo(10,20);
// [...etc...]
}
我想不必预先添加任何<mx:CartesianDataCanvas>
标签比我需要,我会只需要尽可能多的为graph_values.length
。有人能告诉我我要去哪里吗?