連線可以用tree的line-alpha屬性設(shè)置tree.setStyle("lineAlpha",alphaValue);alphaValue從0到1+-號要用圖片代替[Embed(source="/assets/plus.gif")];[Embed(source="/assets/minus.gif")];privatefunctionplusDisclosureIconsChange():void{tree.setStyle("disclosureClosedIcon",PLUS);tree.setStyle("disclosureOpenIcon",MINUS);}