actionscript 在单击按钮后存储值

Question

我编程不多。有时我会编写一些 Actionscript 3 程序。现在我想创建一个 Flash 环境，人们可以在其中单击按钮并播放视频。我想我几乎用下面的脚本解决了这个问题：

public class main extends MovieClip 
{
    private var drukknop1:knopje;
    private var drukknop2:knopje;
    private var drukknop3:knopje;
    private var drukknop4:knopje;
    private var drukknop5:knopje;
    private var drukknop6:knopje;
    private var drukknop7:knopje;
    private var drukknop8:knopje;
    private var drukknop9:knopje;
    private var drukknop10:knopje;
    private var videoclip:FLVPlayback = new FLVPlayback();
    private var buttonClicked:Number = 0;

    public function main() 
    {
        // plaatsen van buttons on stage
        drukknop1 = new knopje();
        drukknop1.name = "inst_knop1";
        drukknop1.x = 50;
        drukknop1.y = 70;
        addChild(drukknop1);
        drukknop1.buttonMode = true;
        drukknop1.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop1.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop2 = new knopje();
        drukknop2.name = "inst_knop2";
        drukknop2.x = 150;
        drukknop2.y = 70;
        addChild(drukknop2);
        drukknop2.buttonMode = true;
        drukknop2.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop2.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop3 = new knopje();
        drukknop3.name = "inst_knop3";
        drukknop3.x = 250;
        drukknop3.y = 70;
        addChild(drukknop3);
        drukknop3.buttonMode = true;
        drukknop3.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop3.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop4 = new knopje();
        drukknop4.name = "inst_knop4";
        drukknop4.x = 350;
        drukknop4.y = 70;
        addChild(drukknop4);
        drukknop4.buttonMode = true;
        drukknop4.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop4.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop5 = new knopje();
        drukknop5.name = "inst_knop5";
        drukknop5.x = 450;
        drukknop5.y = 70;
        addChild(drukknop5);
        drukknop5.buttonMode = true;
        drukknop5.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop5.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop6 = new knopje();
        drukknop6.name = "inst_knop6";
        drukknop6.x = 550;
        drukknop6.y = 70;
        addChild(drukknop6);
        drukknop6.buttonMode = true;
        drukknop6.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop6.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop7 = new knopje();
        drukknop7.name = "inst_knop7";
        drukknop7.x = 650;
        drukknop7.y = 70;
        addChild(drukknop7);
        drukknop7.buttonMode = true;
        drukknop7.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop7.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop8 = new knopje();
        drukknop8.name = "inst_knop8";
        drukknop8.x = 750;
        drukknop8.y = 70;
        addChild(drukknop8);
        drukknop8.buttonMode = true;
        drukknop8.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop8.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop9 = new knopje();
        drukknop9.name = "inst_knop9";
        drukknop9.x = 850;
        drukknop9.y = 70;
        addChild(drukknop9);
        drukknop9.buttonMode = true;
        drukknop9.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop9.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

        drukknop10 = new knopje();
        drukknop10.name = "inst_knop10";
        drukknop10.x = 950;
        drukknop10.y = 70;
        addChild(drukknop10);
        drukknop10.buttonMode = true;
        drukknop10.addEventListener(MouseEvent.MOUSE_UP, _flv_component);
        drukknop10.addEventListener(MouseEvent.MOUSE_DOWN, ButtonClicked);

    }
    private function _flv_component(event:MouseEvent):void
    {
        //plaatsen van de video player door drukken op de knop 
        drukknop1.buttonMode = false;
        drukknop1.removeEventListener(MouseEvent.MOUSE_UP, _flv_component);

        videoclip.x = (stage.stageWidth/2)-(videoclip.width/2);
        videoclip.y = (stage.stageHeight/2)-(videoclip.height/2);
        videoclip.width = 640;
        videoclip.height = 400;
        videoclip.autoPlay = true;
        videoclip.skin = "MinimaSilverPlayBackSeekMute.swf";

        if(buttonClicked ==1)
        {videoclip.load("Functieomschrijvingscene.flv");}
        else if(buttonClicked ==2)
        {videoclip.load("2.flv");}
        else if(buttonClicked ==3)
        {videoclip.load("3.flv");}
        else if(buttonClicked ==4)
        {videoclip.load("4.flv");}
        else if(buttonClicked ==5)
        {videoclip.load("5.flv");}
        else if(buttonClicked ==6)
        {videoclip.load("6.flv");}
        else if(buttonClicked ==7)
        {videoclip.load("7.flv");}
        else if(buttonClicked ==8)
        {videoclip.load("8.flv");}
        else if(buttonClicked ==9)
        {videoclip.load("9.flv");}
        else if(buttonClicked ==10)
        {videoclip.load("10.flv");}

        videoclip.play();
        addChild(videoclip);
        videoclip.addEventListener(Event.COMPLETE,videoComplete);
    }
    function videoComplete(event:Event):void
    {
        //Verwijderen van FLVPlayback component
        trace ("video is klaar");
        removeChild(videoclip);
        buttonClicked = 0;
        trace (buttonClicked);

    }
    function ButtonClicked(Event:MouseEvent):void
    {
        trace ("ButtonClicked functie werkt.");
        trace (buttonClicked);

        // het opslaan van een nummer van een button
        if(event.target.name == drukknop1)
        {buttonClicked = 1;}
        else if(event.target.name == drukknop2)
        {buttonClicked = 2;}
        else if(event.target.name == drukknop3)
        {buttonClicked = 3;}
        else if(event.target.name == drukknop4)
        {buttonClicked = 4;}
        else if(event.target.name == drukknop5)
        {buttonClicked = 5;}
        else if(event.target.name == drukknop6)
        {buttonClicked = 6;}
        else if(event.target.name == drukknop7)
        {buttonClicked = 7;}
        else if(event.target.name == drukknop8)
        {buttonClicked = 8;}
        else if(event.target.name == drukknop9)
        {buttonClicked = 9;}
        else if(event.target.name == "inst_knop10")
        {buttonClicked = 10;}
    }
}

}

在函数 "ButtonClicked, I want to check which button is clicked. After that I want to store a value in the private var "Buttonclicked" 中，因此根据这个数字我知道需要加载哪个 FLV。但是当我导出时出现错误 "Access of Undefined property event"。这可能是必须要做的在函数中使用我的 "If" 语句，但我不知道如何解决这个问题。

有人可以帮帮我吗？我知道用类编程会更简洁，但我在这方面经验不足。

提前致谢，哈罗德

Answer 1

你得到那个错误是因为你为你的 ButtonClicked() 函数声明了一个名为 Event 的 MouseEvent 对象并且在你使用的函数内部 event，我认为这只是一个打字错误。

所以你的函数可以是这样的:

function ButtonClicked(event:MouseEvent):void
{
    // ...
}

此外，我在您的代码中指出，您已经编写了很多代码来做一些非常简单的事情，并不需要所有这些代码。不要忘记，当你重复同样的事情 n 次（你的情况是 10 次）时，你做错了什么，你应该（可以）优化它。例如，您可以使用一个函数来执行重复任务 ...

为此，举个例子：

package {

    import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import flash.events.Event;

    public class Main extends MovieClip {

        private const BUTTONS_NUM:int = 10;
        private const BOTTONS_Y:int = 70;
        private const BUTTONS_SUFFIX:String = 'inst_knop';
        private const VIDEOS:Array = ['1.flv', '2.flv', '3.flv', '4.flv', '5.flv', '6.flv', '7.flv', '8.flv', '9.flv', '10.flv'];

        public function Main() 
        {
            // initialize the FLVPlayback component inserted in the stage
            videoclip.width = 640;
            videoclip.height = 400;
            videoclip.autoPlay = true;
            videoclip.addEventListener(Event.COMPLETE,videoComplete);

            createButtons();
        }   

        private function createButtons(): void 
        {
            for(var i:int = 0; i < BUTTONS_NUM; i++){
                var button:knopje = new knopje();
                    button.name = BUTTONS_SUFFIX + (i+1);
                    button.x = i*100 + 50;
                    button.y = BOTTONS_Y;
                    button.buttonMode = true;
                    button.addEventListener(MouseEvent.CLICK, playVideo);
                addChild(button);
            }
        }

        private function playVideo(event:MouseEvent):void 
        {   
            // get button's index, for example : 7 for the button called "inst_knop7"
            var button_index:int = int((event.currentTarget.name).substr(BUTTONS_SUFFIX.length)) - 1;   

            // play the video
            videoclip.play('video/' + VIDEOS[button_index]);
        }

        private function videoComplete(event:Event):void 
        {
            trace('end of the video.');
        }
    }
}

希望能帮到你。

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