Actionscript 3 flash/Actionscript-.alpha属性不总是工作

我正在修改别人的代码，所有的工作都是在Flash CS5上完成的actionscript 3.0。以下是操作脚本：

var buttons = ["suspend", "dissolve"];
// there are two buttons on the screen. One says 'Suspend' and the other says 'dissolve'.
// When 'suspend' is clicked, information on the word 'suspend' fades in onto the screen
// and, if information on the word 'dissolve' is on the screen, it disappears.

// When 'dissolve' is clicked, information on the word 'dissolve' fades in onto the screen
// and, if information on the word 'suspend' is on the screen, it disappears.

// the code below explains this:

function changeContent (mc:MovieClip):void{

for (var i: int = 0; i < buttons.length ; i++){
    if (buttons[i].associated == mc){ // if 'suspend' or 'dissolve' is clicked
        tweenA = new Tween (buttons[i].associated, "alpha", Strong.easeOut, buttons[i].associated.alpha, 1, tweenSpeed, false); 
        // the line above makes the information corresponding to the button fade in

    }else{
        buttons[i].associated.alpha = 0; // otherwise make the information corresponding to the button disappear
    }
}
checkDone (); // checks if both buttons are clicked.. this part works fine
}

---

如果两个按钮一个接一个地单击，则无法正常工作，速度非常快。你知道如何解决这个问题吗？

你有一个有持续时间的tween动画，还有一个设置tween属性的语句，所以你的代码中有两个部分改变了一个变量，而不知道它在其他地方被改变了。解决方案是在设置alpha之前停止吐温

    }else{  
        if (tweenA.isPlaying) tweenA.stop(); // there!
        buttons[i].associated.alpha = 0; // otherwise make the information corresponding to the button disappear
    }

但您需要避免一个变量与多个可以同时更改的对象相关的情况，比如您希望关联的“暂停”和“溶解”文本同时淡入（可能在不同的位置），并且二者之间只有一个变量，您无法同时控制它们。在这里，我们遇到了同样的事情：使用此代码，除了最后一个按钮外，您将无法淡入任何文本！这是因为我们对所有可能的tween使用

tweenA

，即使在特定时间只有一个活动tween。所以，我们必须再修一点

var tweenB:Tween; // a temporary tween for a new fade in animation
for (var i: int = 0; i < buttons.length ; i++){
    if (buttons[i].associated == mc){ // if 'suspend' or 'dissolve' is clicked
        tweenB = new Tween (buttons[i].associated, "alpha", Strong.easeOut, buttons[i].associated.alpha, 1, tweenSpeed, false); 
        // the line above makes the information corresponding to the button fade in
        // and now we store a new tween in another var so that it won't be stopped at once
    }else{  
        if (tweenA && tweenA.isPlaying) tweenA.stop(); // And here we stop old tween
        // also protecting self from 1009 if no tween was stored yet
        buttons[i].associated.alpha = 0; // otherwise make the information corresponding to the button disappear
    }
}
tweenA=tweenB; // store newly created tween, if any (!) into our current tween var

var-tweenB:Tween；//用于新淡入动画的临时二人组
对于（变量i:int=0；i

EDIT:啊，你在tweenB中存储了一个新的tween，天才！谢谢

var tweenB:Tween; // a temporary tween for a new fade in animation
for (var i: int = 0; i < buttons.length ; i++){
    if (buttons[i].associated == mc){ // if 'suspend' or 'dissolve' is clicked
        tweenB = new Tween (buttons[i].associated, "alpha", Strong.easeOut, buttons[i].associated.alpha, 1, tweenSpeed, false); 
        // the line above makes the information corresponding to the button fade in
        // and now we store a new tween in another var so that it won't be stopped at once
    }else{  
        if (tweenA && tweenA.isPlaying) tweenA.stop(); // And here we stop old tween
        // also protecting self from 1009 if no tween was stored yet
        buttons[i].associated.alpha = 0; // otherwise make the information corresponding to the button disappear
    }
}
tweenA=tweenB; // store newly created tween, if any (!) into our current tween var