<?xml version=”1.0″?>
<!– Simple example to demonstrate the Alert control. –>
<mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml”>
<mx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.events.CloseEvent;
// Event handler function uses a static method to show
// a pop-up window with the title, message, and requested buttons.
private function clickHandler(event:Event):void {
Alert.show("Do you want to save your changes?", "Save Changes", 3, this, alertClickHandler);
}
// Event handler function for displaying the selected Alert button.
private function alertClickHandler(event:CloseEvent):void {
if (event.detail==Alert.YES)
status.text="You answered Yes";
else
status.text="You answered No";
}
// Event handler function changes the default Button labels and sets the
// Button widths. If you later use an Alert with the default Buttons,
// you must reset these values.
private function secondClickHandler(event:Event):void {
Alert.buttonWidth = 100;
Alert.yesLabel = "Magenta";
Alert.noLabel = "Blue";
Alert.cancelLabel = "Green";
Alert.show("Select a color:","Color Selection",1|2|8,this);
// Set the labels back to normal:
Alert.yesLabel = "Yes";
Alert.noLabel = "No";
}
]]>
</mx:Script>
<mx:Panel title=”Alert Control Example” width=”75%” horizontalAlign=”center” paddingTop=”10″>
<mx:Text width=”100%” color=”blue” textAlign=”center”
text=”Click the button below to display a simple Alert window.”/>
<mx:Button label=”Click Me” click=”Alert.show(‘Hello World!’, ‘Message’);”/>
<mx:Text width=”100%” color=”blue” textAlign=”center”
text=”Click the button below to display an Alert window and capture the button pressed by the user.”/>
<mx:Button label=”Click Me” click=”clickHandler(event);”/>
<mx:Label id=”status” fontWeight=”bold”/>
<mx:Text width=”100%” color=”blue” textAlign=”center”
text=”Click the button below to display an Alert window that uses custom Button labels.”/>
<mx:Button label=”Click Me” click=”secondClickHandler(event);”/>
</mx:Panel>
</mx:Application>
第一个alert
Alert.show(message,title);// 首参数为要弹出的对话框的内容，第二个参数为要弹出对话框的标题
第二个Alert
Alert.show(“Do you want to save your changes?”, “Save Changes”, 3, this, alertClickHandler); 首参数为要弹出的对话框的内容；第二个参数为要弹出对话框的标题；第三个参数指定可显示的button（可显示的button共四个分别为Alert.YES，Alert.NO ，Alert.OK，Alert.CANCEL 他们的二进制值分别为1，2，4，8），也可以显示多个button，最多可显示四个，以安位或的型式相连：Alert.YES|Alert.NO |Alert.OK|Alert.CANCEL，或者取她们相或之后的二进制数，比如本例中取了Alert.YES与Alert.NO相或后的二进制数， 默认值为Alert.OK；第四个参数为Alert组件的父组件；第五个参数为button的单击响应事件或者称为Alert组件的关闭响应事件，默认值为null即无任何操作
第三个alert
Alert.show(“Select a color:”,”Color Selection”,1|2|8,this);可以更改Alert弹出对话框中button的label值，在alert组件中定义了每个button的label属性，例如：Alert.yesLabel，Alert.noLabel
，通过指定他们的值就可以更改对应button的label值，在本例中1|2|8指的是显示yes，no，cancel三个button
这三个Alert.show()是同一个方法，只是每个在用的时候省略了不同的参数，这个根据不同的需求来定
