flex小技能综合

flex小技巧综合
flex 小技巧
1. 将组件放到最上层
  父容器.setChildIndex(你要的TitleWindow,父容器.numChildren- 1);

2.array的赋值：
  1.可以长度不一致
  2.可以变量
  3.可以push空数组 push([])
  e.g.
                               

     var aa:int = 1; var a:Array = [aa,2,3]; var b:Array = [2,3]; var c:Array = [1,2,3,4]; array.push(a); array.push(b); array.push(c); array.push([aa,aa,aa]); array.push([]);

3.禁止下拉框
  verticalScrollPolicy="off" horizontalScrollPolicy="off"

4.变量的访问ArrayCollection中的值
  ArrayCollection["name"]

5.画点
 

var circle :Sprite = new Sprite();var comp:UIComponent = new UIComponent();circle.graphics.beginFill(0xDC143C);circle.graphics.drawCircle(x,y,r);comp.addChild(circle);worldmap.addChild(comp);

6.画边界

    var bounds:Sprite = new Sprite();    bounds.graphics.beginFill(0x000000);    bounds.graphics.drawRect(x1,y1,w1,h1);    bounds.graphics.drawRect(x2,y2,w2,h2);    bounds.graphics.endFill();    var comp:UIComponent = new UIComponent();    comp.addChild(bounds);    panel.addChild(comp);

7.arrayCollection排序

             import mx.collections.SortField;               import mx.collections.Sort;               import mx.collections.ArrayCollection;               private var acSort:ArrayCollection=               new ArrayCollection([{id:0,userName:"zhangSan",age:21},                                   {id:2,userName:"liSi",age:24},                                  {id:1,userName:"wangWu",age:31}]);                                             private function sortAc():ArrayCollection{                   var sort:Sort=new Sort();                   //按照ID升序排序                   sort.fields=[new SortField("id")];                                      //按照userName降序排序                   sort.fields=[new SortField("userName",true,true)];                                      //先按ID升序,再按userName降序                   sort.fields[new SortField("id"),new SortField("userName",true,true)];                   acSort.sort=sort;                   acSort.refresh();//更新                   return acSort;               }  

7.设置Alert的字体样式

    <mx:Style>        Alert{            titleStyleName: "alertTitle";            messageStyleName: "alertMessage";            buttonStyleName: "alertButton";            cornerRadius: 10;            embedFonts: true;        }        .alertTitle {            letterSpacing: 0;            fontSize: 14;            color: red;        }        .alertMessage {            letterSpacing: 2;            fontSize: 14;            fontWeight: bold;            color: #000000;        }        .alertButton {            letterSpacing: 0;            fontSize: 12;            fontWeight: normal;            color: black;        }    </mx:Style>

8.读JSON串的键值

                var obj:Object = JSON.decode(jsonString);                for each(var key:String in obj){                    trace("key:"+key+" value:"+obj[key]);                }

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