Flex 3 UI ActionScript 编程入门 [英] Getting Started with Flex 3 UI ActionScript Programming

问题描述

在 ActionScript 中开始 Flex 3 UI 编程有什么好的资源吗?如果有人有任何想法，我在以下方面遇到了一些问题.它的大小合适，但我的按钮没有显示.有人有什么想法吗?

Are there any good resources for starting Flex 3 UI programming in ActionScript? I am having some issues with the following if anyone has any ideas. It gets the right size, but my buttons are not showing up. Anyone have any ideas?

package 
{
    import flash.display.*;

    import mx.controls.Button;
    import mx.controls.TileList;
    import mx.controls.sliderClasses.Slider;
    import mx.controls.ProgressBar;

    import flash.net.FileReferenceList;

    [SWF(width="720", height="480", backgroundColor="#ffffff", framerate="30")]

    public class PhotoUploader extends Sprite
    {
        var AddPhotosButton:Button;
        var RemovePhotoButton:Button;
        var UploadPhotosButton:Button;

        public function PhotoUploader():void
        {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;

            AddPhotosButton = new Button();
            AddPhotosButton.x = 10;
            AddPhotosButton.y = 10;
            AddPhotosButton.width = 100;
            AddPhotosButton.height = 20;

            RemovePhotoButton = new Button();
            UploadPhotosButton = new Button();

            addChild(AddPhotosButton);
            addChild(RemovePhotoButton);
            addChild(UploadPhotosButton);
        }
    }
}

推荐答案

对于真正的 Flex 应用程序，我认为您需要从顶级 mx.core.Application(通常在 MXML 中定义)开始而不是 ActionScript)，您可以向其中添加 mx.core.UIComponents.我认为您的 PhotoUploader 将是自定义 UIComponent 的一个很好的例子.

For a true Flex application, I think you need to start with a top level mx.core.Application (often defined in MXML rather than ActionScript), to which you would add mx.core.UIComponents. I think your PhotoUploader would be a good example of a custom UIComponent.

Flex 帮助/教程 页面非常好.我建议从那里开始.自定义组件 已明确涵盖，但您可能希望更早开始流.

The Flex help/tutorial pages are quite good. I'd recommend starting there. Custom components are covered explicitly, but you might want to start earlier in the stream.

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