PopUpManager-createPopUp与addPopUp差别

PopUpManager--createPopUp与addPopUp区别

addPopUp代码：

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"        layout="vertical"        verticalAlign="middle"        backgroundColor="white"        creationComplete="init()">    <mx:Script>        <![CDATA[            import mx.controls.Label;            import mx.events.CloseEvent;            import mx.containers.TitleWindow;            import mx.managers.PopUpManager;            private var titleWindow:TitleWindow;            private function init():void {                var label:Label = new Label();                label.text = "Hello world";                titleWindow = new TitleWindow();                titleWindow.title = "Custom title";                titleWindow.showCloseButton = true;                titleWindow.width = 240;                titleWindow.height = 180;                titleWindow.addEventListener(CloseEvent.CLOSE, titleWindow_close);                titleWindow.addChild(label);                PopUpManager.addPopUp(titleWindow, this, true);                PopUpManager.centerPopUp(titleWindow);            }            private function titleWindow_close(evt:CloseEvent):void {                PopUpManager.removePopUp(titleWindow);            }        ]]>    </mx:Script>    <mx:Button label="Launch TitleWindow" click="init()" /></mx:Application>

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createPopUp代码：

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"        layout="vertical"        verticalAlign="middle"        backgroundColor="white"        creationComplete="init()">    <mx:Script>        <![CDATA[        import mx.managers.PopUpManagerChildList;            import mx.controls.Label;            import mx.events.CloseEvent;            import mx.containers.TitleWindow;            import mx.managers.PopUpManager;            private var titleWindow:TitleWindow;            private function init():void {                var label:Label = new Label();                label.text = "Hello world";                titleWindow = new TitleWindow();titleWindow = TitleWindow(PopUpManager.createPopUp(this,TitleWindow,true));titleWindow.title = "Custom title";                titleWindow.showCloseButton = true;                titleWindow.width = 240;                titleWindow.height = 180;titleWindow.addChild(label);                titleWindow.addEventListener(CloseEvent.CLOSE, titleWindow_close);                               PopUpManager.centerPopUp(titleWindow);            }            private function titleWindow_close(evt:CloseEvent):void {                PopUpManager.removePopUp(titleWindow);            }        ]]>    </mx:Script>    <mx:Button label="Launch TitleWindow" click="init()" /></mx:Application>

?createPopUp:是上来先设置好弹出方式，然后在new出来一个TitleWindow的对象，然后通过此对象设置他的变现形式。

addPopUp：是先new出来对象，设置好表现形式，然后在选择弹出来的方式。

一定要注意new对象与弹出方式的先后顺序。