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  • Flex 界面初始化 自定义 预加载 类!

    说明:

     自定义界面初始化过程提示:初始化...,初始化完毕,加载完毕!

    ZPreloader.as

    package com.command
    {
        import flash.display.Graphics;
        import flash.display.Sprite;
        import flash.events.Event;
        import flash.events.MouseEvent;
        import flash.events.ProgressEvent;
        import flash.text.TextField;
        
        import flashx.textLayout.formats.Float;
        
        import mx.controls.Alert;
        import mx.core.FlexGlobals;
        import mx.events.CloseEvent;
        import mx.events.FlexEvent;
        import mx.managers.PopUpManager;
        import mx.preloaders.DownloadProgressBar;
        
        import spark.components.Application;
    
        public class ZPreloader extends DownloadProgressBar
        {
            private var progress:TextField;
            private var _preloader:Sprite;
            public function ZPreloader()
            {
                super();
                progress = new TextField();
                progress.width = 200;
                progress.height = 45;
    //            progress.x = 300;
    //            progress.y = 300;
                
                addChild(progress);
            }
            
            private function centerPreloader():void
            {
                if ((stage.stageWidth > 0) && (_preloader)) {
                    x = (stage.stageWidth / 2) - (progress.width / 2);
                    y = (stage.stageHeight / 2) - (progress.height / 2);
                    _preloader.visible = true;
                }
                
            }
            
            override public function set preloader(s:Sprite):void
            {
                _preloader = s;
                _preloader.addEventListener(ProgressEvent.PROGRESS, progHandler);
                _preloader.addEventListener(Event.COMPLETE, compHandler);
                _preloader.addEventListener(FlexEvent.INIT_COMPLETE, initCompHandler);
                _preloader.addEventListener(FlexEvent.INIT_PROGRESS, initProgHandler);
            }
            
            private function progHandler(event:ProgressEvent):void
            {
    //            var wid:Number = Application(FlexGlobals.topLevelApplication).width;
    //            var hgt:Number = Application(FlexGlobals.topLevelApplication).height;
                centerPreloader();
                var procNum:Number = event.bytesLoaded / event.bytesTotal;
                var curP:Number = procNum * 200;
                progress.text = int(procNum * 100)  + "%";
                
                var g:Graphics = this.graphics; //绘图区域  
                g.clear();  
                g.beginFill(0x88ff22);  
                g.drawRect(0,20, 200, 10);  
                g.endFill();  
                g.beginFill(0x5085D6);  
                g.drawRect(0,20, curP, 10);  
                g.endFill();  
            }
            
            private function compHandler(event:Event):void
            {
    
                progress.text = "加载完毕";
    
            }
            
            private function initCompHandler(event:FlexEvent):void
            {
                
                progress.text = "初始化完毕"; 
                
                dispatchEvent(new Event(Event.COMPLETE));
            }
            
            private function initProgHandler(event:FlexEvent):void
            {
    
                progress.text = "初始化...";
                
            }
        }
    }

    使用方法:

    <!-- 在Application根节点添加属性 -->
    preloader="com.command.ZPreloader"
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  • 原文地址:https://www.cnblogs.com/editor/p/3849228.html
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