使用变量一次只允许播放一个视频

Question

我最近创建了一个有四个按钮的项目。每个按钮都会在舞台上添加一个 FLV 播放器并播放一段视频。在测试期间，我注意到在第一个功能完成加载电影之前单击另一个按钮，将播放两部电影。

有没有更有效的方法来处理这个问题？我觉得这里有很多冗余代码，有没有更好的方法来做以下事情：

按下一个按钮
加载视频一个
忽略所有其他事件侦听器，直到电影结束或用户关闭视频（点击关闭）

我最初认为创建两个函数是个好主意，一个删除所有事件侦听器，另一个添加所有事件侦听器。按下按钮时，在它加载 FLVPlayback 之前，移除所有事件侦听器。当电影完成时，将所有听众添加回来。这看起来很费力，而且效率很低。

我编写了以下代码作为我正在尝试做的事情的示例。（虽然每次都会输出相同的字符串 "One Can play"）。

var canLaunchOne:Boolean;
var canLaunchTwo:Boolean;
var canLaunchThree:Boolean;
var canLaunchFour:Boolean;

buttonMCOne.addEventListener(MouseEvent.MOUSE_DOWN, playMovieOne);
buttonMCTwo.addEventListener(MouseEvent.MOUSE_DOWN, playMovieTwo);
buttonMCThree.addEventListener(MouseEvent.MOUSE_DOWN, playMovieThree);
buttonMCFour.addEventListener(MouseEvent.MOUSE_DOWN, playMovieFour);

trace(canLaunchTwo);

function playMovieOne(event:Event):void {
    canLaunchOne = true;
    canLaunchTwo = false;
    canLaunchThree = false;
    canLaunchFour = false;
    trace(canLaunchOne);
    playTheRightVideo();

}

function playMovieTwo(event:Event):void {
    canLaunchOne = false;
    canLaunchTwo = true;
    canLaunchThree = false;
    canLaunchFour = false;
    playTheRightVideo();

}

function playMovieThree(event:Event):void {
    canLaunchOne = false;
    canLaunchTwo = false;
    canLaunchThree = true;
    canLaunchFour = false;
    playTheRightVideo();

}

function playMovieFour(event:Event):void {
    canLaunchOne = false;
    canLaunchTwo = false;
    canLaunchThree = false;
    canLaunchFour = true;
    playTheRightVideo();

}

function playTheRightVideo():void {
    if(canLaunchOne = true){
        trace("One Can Play"); // do all that video stuff for video one
    } else if(canLaunchTwo = true){
        trace("Two Can Play"); // do all that video stuff for video one
    } else if(canLaunchThree = true){
        trace("Three Can Play"); // do all that video stuff for video one
    } else {
        trace("Four Can Play");
    }
}

我试过这段代码，我明白了 "working"，但是每个函数总是将 canLaunchMovie 设置为 true...

import flash.events.Event;

var canLaunchMovie:Boolean;

buttonMCOne.addEventListener(MouseEvent.MOUSE_DOWN, playMovieOne);
buttonMCTwo.addEventListener(MouseEvent.MOUSE_DOWN, playMovieTwo);
buttonMCThree.addEventListener(MouseEvent.MOUSE_DOWN, playMovieThree);
buttonMCFour.addEventListener(MouseEvent.MOUSE_DOWN, playMovieFour);

function playMovieOne(e:Event):void {
    if(canLaunchMovie = true){
        this.canLaunchMovie = false;
        trace("One Can Play"); // do all that video stuff for video one
    } else {
        trace("I can't do that(play movie one) Dave");
    }
}

function playMovieTwo(e:Event):void {
    if(canLaunchMovie = true){
        this.canLaunchMovie = false;
        trace("Two Can Play"); // do all that video stuff for video one
    } else {
        trace("I can't do that(play movie two) Dave");
    }
}

function playMovieThree(e:Event):void {
    if(canLaunchMovie = true){
        this.canLaunchMovie = false;
        trace("Three Can Play"); // do all that video stuff for video one
    } else {
        trace("I can't do that(play movie three) Dave");
    }
}

function playMovieFour(e:Event):void {
    if(canLaunchMovie = true){
        this.canLaunchMovie = false;
        trace("Four Can Play"); // do all that video stuff for video one
    } else {
        trace("I can't do that(play movie four) Dave");
    }
}

Answer 1

您不需要超过一个 flvplayback。您只需要更改您的 flvplayback 的 source。

使用变量一次只允许播放一个视频

Using a variable to allow only one video to play at a time

actionscript-3

flash

conditional-statements

memory-efficient