這感覺就像一個新手問題,所以要振作起來。如何引用運行時添加的Flex元素?
我很難得到編譯時使用'id'屬性添加的元素的引用。我看到一些論壇話題表明這是不可能的,並且以這種方式獲得對元素的引用更爲棘手,但從來不僅僅是這種技巧。這段代碼很有趣: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...]
}
我想不必預先添加任何<mx:CartesianDataCanvas>
標籤比我需要,我會只需要儘可能多的爲graph_values.length
。有人能告訴我我要去哪裏嗎?