Apache flex 通过调用名称来改变颜色
更新：不确定此代码是否有效，但无法获取精灵的名称，其中Apache flex 通过调用名称来改变颜色,apache-flex,flash,actionscript,Apache Flex,Flash,Actionscript,更新：不确定此代码是否有效，但无法获取精灵的名称，其中c.getChildByName（spName）为空，spName是精灵的字符串名称 private var s:Sprite; private var s2:Sprite; private var c:UIComponent; private var c2:UIComponent; private function drawQuart
c.getChildByName（spName）spName private var s:Sprite;
private var s2:Sprite;
private var c:UIComponent;
private var c2:UIComponent;
private function drawQuarterNotes(xx:int,ty:String):void {
if(ty=="up") {
s = new Sprite();
s2 = new Sprite();
c = new UIComponent();
c2 = new UIComponent();
s2.graphics.lineStyle(3,0x333333);
s2.graphics.moveTo(20,0);
s2.graphics.lineTo(20,50);
c2.addChild(s2);
c2.x = xx+16;
c2.y = xx-18;
s.graphics.beginFill(0x333333);
s.graphics.drawEllipse(7,35,18,12);
s.graphics.endFill();
s.name = "asd2";
s.addEventListener(MouseEvent.MOUSE_DOWN,chgColor);
s.addEventListener(MouseEvent.MOUSE_UP,chgColorReset);
c.addChild(s);
c.rotation = -20;
c.x = xx;
c.y = xx;
}
if(ty=="down") {
s2.graphics.lineStyle(3,0x333333);
s2.graphics.moveTo(20,0);
s2.graphics.lineTo(20,50);
c2.addChild(s2);
c2.x = xx+1;
c2.y = xx+35;
s.graphics.beginFill(0x333333);
s.graphics.drawEllipse(7,35,18,12);
s.graphics.endFill();
c.addChild(s);
c.rotation = -20;
c.x = xx;
c.y = xx;
}
addElement(c);
addElement(c2);
}
private function drawQuarterNotes2(xx:int,ty:String):void {
if(ty=="up") {
s = new Sprite();
s2 = new Sprite();
c = new UIComponent();
c2 = new UIComponent();
s2.graphics.lineStyle(3,0x333333);
s2.graphics.moveTo(20,0);
s2.graphics.lineTo(20,50);
c2.addChild(s2);
c2.x = xx+16;
c2.y = xx-18;
s.graphics.beginFill(0x333333);
s.graphics.drawEllipse(7,35,18,12);
s.graphics.endFill();
s.name = "asd1";
s.addEventListener(MouseEvent.MOUSE_DOWN,chgColor);
s.addEventListener(MouseEvent.MOUSE_UP,chgColorReset);
c.addChild(s);
c.rotation = -20;
c.x = xx;
c.y = xx;
}
if(ty=="down") {
s2.graphics.lineStyle(3,0x333333);
s2.graphics.moveTo(20,0);
s2.graphics.lineTo(20,50);
c2.addChild(s2);
c2.x = xx+1;
c2.y = xx+35;
s.graphics.beginFill(0x333333);
s.graphics.drawEllipse(7,35,18,12);
s.graphics.endFill();
c.addChild(s);
c.rotation = -20;
c.x = xx;
c.y = xx;
}
addElement(c);
addElement(c2);
}
我假设您是在flash文件的
操作.asstage添加到\u stagefunction chgColorBlue(element:Sprite):void
{
element.graphics.beginFill(0x000099);
element.graphics.drawEllipse(7,35,18,12);
element.graphics.endFill();
}
呃，我正在使用Flash builder，在尝试您的代码“TypeError:Error#1009:无法访问空对象引用的属性或方法”后仍然会得到空值。我会从跟踪中得到空值，但在“shape1”后添加.name修复方法可能只是将元素作为参数传递给函数，并删除
var元素=stage.getChildByName（'shape1'）行。然后，函数声明将是函数chgColorBlue（元素：Sprite）：void
。我猜您可能是在创建元素后没有调用函数，或者您没有直接将元素添加到stage，需要在不同元素的上下文中调用getChildByName
。它看起来如何？你能给我举个例子吗？现在出去吃午饭。那很酷而且更容易！但我有一个问题，如果我实现了多个实例，唯一最新的精灵可以被识别，旧的会丢失，意味着不能叫他们的名字，我如何保留所有的，这样我就可以单独更改？你不会丢失任何东西！从创建一个新的精灵实例开始，给它一个名称并将其添加到容器中，就可以使用changeSpriteColor方法更改其颜色。如果从容器中删除了一个Sprite引用，并且没有将其分配给创建它的函数范围之外的变量，则只会丢失它。按照您的代码，当我运行两个创建“shape1”和“shape2”的函数“shape1”时，UIComponent和Sprite被声明为全局的在舞台上消失，但形状2保留。我已经更新了我的代码，看看这是否是用2个音符编码的正确方法。假设一个是四分音符名称“asd2”，另一个是asd1，我感到困惑，为什么它不能与许多组合一起工作。哦，那么我们必须为每个图形创建尽可能多的精灵？不能共享吗？如果是，我现在有了更好的理解。左一件事是创建新的sprite作为变量。感谢
function chgColorBlue(element:Sprite):void
{
element.graphics.beginFill(0x000099);
element.graphics.drawEllipse(7,35,18,12);
element.graphics.endFill();
}
private var c:UIComponent = new UIComponent();
private var s1:Sprite = new Sprite();
private var s2:Sprite = new Sprite();
private function init():void
{
s1.name = "shape1";
s2.name = "shape2";
//make sure s2 doesn't appear on top of s1
s2.x = 100;
s1.addEventListener(MouseEvent.MOUSE_DOWN, chgColorBlue);
s1.addEventListener(MouseEvent.MOUSE_UP, chgColorReset);
c.addChild(s1);
c.addChild(s2);
addElement(c);
//change shape1 to red
changeSpriteColor( 'shape1' , 0x990000 );
//change shape2 to grey
changeSpriteColor( 'shape2' , 0x777777 );
}
//change a sprite color by calling its name
private function changeSpriteColor( spName:String , color:uint ):void
{
var child:Sprite = c.getChildByName(spName ) as Sprite;
//make sure the child has been added to the container
if( child != null )
shapeGraphics( child , color );
}
//change a sprite color
private function shapeGraphics( sp:Sprite , color:uint ):void
{
//make sure to clear the graphics , before changing the color
//there are other ways to change the color
//but i'm following your code!
sp.graphics.clear();
sp.graphics.beginFill(0x333333);
sp.graphics.drawEllipse(7,35,18,12);
sp.graphics.endFill();
}
private function chgColorBlue(e:MouseEvent):void
{
shapeGraphics( e.currentTarget , 0x000099 );
}
private function chgColorReset(e:MouseEvent):void
{
shapeGraphics( e.currentTarget , 0x333333 );
}