问题
I don't program a lot. Sometimes I program a bit of Actionscript 3. Now I wanted to create an flash enviroment where people can click on buttons and play a video. I think I almost figured it out with the following script:
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;}
}
}
}
In the function "ButtonClicked, I want to check which button is clicked. After that I want to store a value in the private var "Buttonclicked" So that based on this number I know which FLV needs to be loaded. But when I export I get an error "Access of Undefined property event". This probably has got to do with my "If" statement in the functions but I have no clue on how to solve this.
Could someone please help me out? I know programming with classes would be much neater, but I have to little experience in this.
Thanks in advance, Harold
回答1:
You got that error because for your ButtonClicked() function you've declared an MouseEvent object called Event and inside the function you've used event, I think it's just a typing mistake.
So your function can be like this :
function ButtonClicked(event:MouseEvent):void
{
// ...
}
Also, I remarked in your code that you've written a lot of code to do something really easy and don't need all that code. Don't forget that when you are repeating the same thing n times (10 times for your case), that you are doing something wrong and that you should (can) optimize that. You can use a function, for example, to do that repeated task ...
For that, take this example :
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.');
}
}
}
Hope that can help.
来源：https://stackoverflow.com/questions/34453780/actionscript-storing-a-value-after-a-button-is-clicked