我在一個函數中調用Alert.Show並希望從那裏得到結果（Flex，ActionScript）

Question

我在函數中使用Alert.show，我想從那裏獲取用戶答案。那麼我怎麼能做到這一點。問題是調用Alert.show將返回true或false值的函數取決於用戶的答案。 但它似乎在Alert.show中只允許傳入一個CloseHandler。這是一項新功能。並且因爲我可以從用戶回答的地方獲得用戶答案。

真的感謝您的幫助 元

Answer 1

試試這個代碼

<?xml version="1.0" encoding="utf-8"?> 
<!-- Simple example to demonstrate the Halo Alert control. --> 
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
     xmlns:s="library://ns.adobe.com/flex/spark" 
     xmlns:mx="library://ns.adobe.com/flex/mx"> 

    <fx: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(evt:Event):void { 
       Alert.show("Do you want to save your changes?", "Save Changes", Alert.YES|Alert.NO, this, alertClickHandler); 
      } 

      // Event handler function for displaying the selected Alert button. 
      private function alertClickHandler(evt:CloseEvent):void { 
       if (evt.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(evt:Event):void { 
       Alert.buttonWidth = 100; 
       Alert.yesLabel = "Magenta"; 
       Alert.noLabel = "Blue"; 
       Alert.cancelLabel = "Green"; 

       Alert.show("Select a color:", "Color Selection", Alert.YES|Alert.NO|Alert.CANCEL, this); 

       // Set the labels back to normal: 
       Alert.yesLabel = "Yes"; 
       Alert.noLabel = "No"; 
      } 
     ]]> 
    </fx:Script> 

    <s:Panel title="Halo Alert Control Example" 
      width="75%" 
      horizontalCenter="0" verticalCenter="0"> 
     <s:VGroup left="10" right="10" top="10" bottom="10"> 
      <s:Label color="blue" 
        text="Click the button below to display a simple Alert window."/> 
      <s:Button label="Click Me" click="Alert.show('Hello World!', 'Message');"/> 

      <mx:HRule width="100%" /> 

      <s:Label color="blue" 
        text="Click the button below to display an Alert window and capture the button pressed by the user."/> 
      <s:Button label="Click Me" click="clickHandler(event);"/> 
      <s:Label id="status" fontWeight="bold"/> 

      <mx:HRule width="100%" /> 

      <s:Label color="blue" 
        text="Click the button below to display an Alert window that uses custom Button labels."/> 
      <s:Button label="Click Me" click="secondClickHandler(event);"/> 
     </s:VGroup> 
    </s:Panel> 

</s:Application> 

Answer 2

你可以做到這一點。 方法如下：

private function deleteItem_Confirmation_Handler(event:CloseEvent):void 
    { 
     if(event.detail == Alert.OK) 
     { 
      //Your code here 
     } 
    } 

    public function deleteValue():void 
    { 
     Alert.show("Are you sure you want to delete this item?", "confimation", Alert.OK | Alert.CANCEL, null, deleteItem_Confirmation_Handler, null, Alert.OK); 
    } 

Answer 3

變化

evt.detail == Alert.YES 

到

evt.detail == 1 

Yes按鈕返回1 int值，無按鈕會返回一個int值爲2