ascb

1.格式化輸出數(shù)據(jù)及貨幣
    var styler:NumberFormat = new NumberFormat("#,###,###,###");
    styler.format(123456789);
    更換格式用 styler.mark = "#,###,###,###.0000";
    貨幣：
    var styler:NumberFormat = new NumberFormat();
    styler.currencyFormat(123456,new Locale("us"));
    styler.currencyFormat(123456,new Locale("cn"));
2.生成隨機(jī)數(shù)
    Math類的random()方法可生成0~0.999999999的隨機(jī)小數(shù)
    NumberUtilities.random(最小值，最大值，間隔值);
    NumberUtilities.random(0,100);//生成0~100的整數(shù)
    NumberUtilities.random(0,100,5);//間隔5
3.使用計(jì)時(shí)器
    var timer:Timer = new Timer(1000);
    timer.addEventListener(TimerEvent.TIMER,onTimer);
    timer.start();//計(jì)時(shí)器不會(huì)自動(dòng)執(zhí)行，必須用start()方法開(kāi)始
    function onTimer(event:TimerEvent):void{
        trace("on timer");
    }

    var timer:Timer = new Timer(5000,1);//說(shuō)明此計(jì)時(shí)器只能執(zhí)行一次
    timer.adddEventListener(TimerEvent.TIMER,deferredMethod);
    timer.start();
4.計(jì)算日期時(shí)間間隔
    var one:Date = new Date();
    var two:Date = DateUtilities.addTo(one,4,1,3);//在日期one的基礎(chǔ)上添加4年1月3天
    DateUtilies.elapsedYears(two,one);//計(jì)算相差幾年 4
    DateUtilies.elapseMonths(two,one);//計(jì)算相差幾月 49
    DateUtilies.elapseDays(two,one);//計(jì)算相差幾天  1495
    .....
    DateUtilies.elapseMonths(two,one,true); //加上第三個(gè)參數(shù)，則返回兩個(gè)日期的相對(duì)值 1
5.字符串處理
    新行符 \n 
    Tab 符\t
    回退符 \b
    制表符 \f
    回車符 \r
     var str:String = "these\twords\tare\tseparated\tby\ttabs";
    搜索字符串：indexOf()        lastIndexOf()
    截取字符串：subStr(開(kāi)始下標(biāo),子串長(zhǎng)度);
                     subString(開(kāi)始下標(biāo)，結(jié)束下標(biāo));
                     slice(開(kāi)始下標(biāo)，結(jié)束下標(biāo));
    轉(zhuǎn)為數(shù)組：split("分隔符");
    替換字符串：replace(搜索字符串，替換字符串）;
    去除空格：StringUtil.trim("");
    反轉(zhuǎn)字符串：reverse();
6.xml 處理
    var xmlTest:XML = <root/>; //創(chuàng)建XML對(duì)象
    xmlTest.newElement = <newElement/>; //添加新元素 方式一
    var id:int = 10;
    xmlTest["user"+id] = "";                       //添加新元素 方式二
    此外還有appendChild(內(nèi)容); 等添加元素方法
    
    添加屬性： 使用@操作符添加屬性
    var myXml:XML = <root><someElement/></root>;
    myXml.someElement.@number = 12;
    myXml.someElement.@String = "test";
    myXml.someElement.@boolean = true;
    myXml.someElement.@array = ["a",null,7,undefined,"c"];
    結(jié)果為：<root><someElement number="12" Sring ="test"  boolean = "true" array = "a,,7,,c"/></root>
    此外可使用[]添加屬性：myXml.someElement.@["color"+num] = "red";    

    讀取元素內(nèi)容：
    var book:XML =<book><title>as3.0</title></book>
    var title:String = book.title.toString();
    讀取元素屬性：
    var fruit:XML = <fruit name="apple" color="red"/>
    fruit.@color; 或 fruit.attribute("color");  //可讀取屬性值
    fruit.@*;       //讀取所有屬性值

    刪除元素或?qū)傩裕?br />    var test:XML = <root>
                                <fruit color="red">apple<fruit>
                                <vegetable color="green"broccoli<vegetable>
                                <dairy color="white">milk</dairy>
                           </root>
    delete test.fruit.@color;
    delete test.dairy;
    delete test.vegetable.text()[0];
    循環(huán)刪除所有屬性：
    var test:XML = <root><fruit color="red" name="apple/></root>;
    var attri:XMLList = test.fruit.@*;
    for(var i:int=attri.length()-1;i>=0;i--){
        delete attri[i];
    }
7.生成驗(yàn)證碼方法
private function generateCheckCode():String{
    var ran:Number;
    var number:Number;
    var code:String;
    var checkCode:String = "";
    for(var i:int=0;i<4;i++){
     ran = Math.random();
     number = Math.round(ran*10000);
     if(number % 2==0){
      code = String.fromCharCode(48+(number % 10));
     }
     else{
      code = String.fromCharCode(65+(number %26));
     }
     checkCode +=code;
    }
    return checkCode;
   }