Actionscript 3 as3通过触摸事件连续移动物体
我正在尝试使用actionscript为我的Nexus7制作一个交互式场景。我试图在按下一个按钮的同时,让颈背的身体不断地移动。跟踪(event.target.name);在tap中,处理程序返回被按下按钮的实例名称,正如我预期的那样,但enter_frame pressed函数中的同一跟踪语句返回按钮的父名称,因此下面的代码中没有发生移动Actionscript 3 as3通过触摸事件连续移动物体,actionscript-3,button,trace,touch-event,physics-engine,Actionscript 3,Button,Trace,Touch Event,Physics Engine,我正在尝试使用actionscript为我的Nexus7制作一个交互式场景。我试图在按下一个按钮的同时,让颈背的身体不断地移动。跟踪(event.target.name);在tap中,处理程序返回被按下按钮的实例名称,正如我预期的那样,但enter_frame pressed函数中的同一跟踪语句返回按钮的父名称,因此下面的代码中没有发生移动 resetBtn.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler); ballBtn.addEve
resetBtn.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler);
ballBtn.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler );
leftArrow.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler );
rightArrow.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler );
private function tapHandler(event:TouchEvent):void
{
//listen for mouse up on the stage, in case the finger moved off of the button accidentally when they release.
rightArrow.addEventListener(TouchEvent.TOUCH_END, endTouch);
//while the mouse is down, run the tick function once every frame as per the project frame rate
addEventListener(Event.ENTER_FRAME, pressed);
trace(event.target.name);
//ball.applyImpulse(new Vec2(25,0));
}
function endTouch(e:Event):void
{
removeEventListener(Event.ENTER_FRAME, pressed);
//stop running the tick function every frame now that the mouse is up
this.removeEventListener(TouchEvent.TOUCH_END,endTouch);
//remove the listener for endTouch
}
function pressed(e:Event):void
{
space.step(1 / stage.frameRate);
trace(e.target.name);
if(e.target.name == "leftArrow")
{
trace("going left");
crane.position.x -= 5;
boom.position.x -= 5;
c.position.x -= 5;
}
if(e.target.name == "rightArrow")
{
trace("going Right");
crane.position.x += 5;
boom.position.x += 5;
c.position.x += 5;
}
}
如果您能帮我解决这个问题或建议一个更好的方法来实现这个问题,我们将不胜感激。您的问题基本上是您正在为输入帧事件将侦听器添加到父级,因此事件分派时的目标不是您希望的按钮。我认为与其移动监听器,不如使用变量保存对按钮的引用,如下所示:
private var curButton:Sprite;
resetBtn.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler);
ballBtn.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler );
leftArrow.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler );
rightArrow.addEventListener(TouchEvent.TOUCH_BEGIN , tapHandler );
private function tapHandler(event:TouchEvent):void
{
curButton = event.target;
curButton.addEventListener(TouchEvent.TOUCH_END, endTouch);
addEventListener(Event.ENTER_FRAME, pressed);
}
function endTouch(e:Event):void
{
trace("touch end received");
removeEventListener(Event.ENTER_FRAME, pressed);
curButton.removeEventListener(TouchEvent.TOUCH_END, endTouch);
curButton = null;
}
function pressed(e:Event):void
{
trace("currently pressed");
space.step(1 / stage.frameRate);
if(curButton == leftArrow)
{
trace("going left");
crane.position.x -= 5;
boom.position.x -= 5;
c.position.x -= 5;
}
if(curButton == rightArrow)
{
trace("going Right");
crane.position.x += 5;
boom.position.x += 5;
c.position.x += 5;
}
}
好的,看看我上面的编辑,希望能帮助解决这个问题。另外,您可能已经发现定义变量时提供的实例名与.name属性或.id属性不同,因此实例名在运行时不再可用(如果确实需要,可以使用name属性,但必须自己填充,通常最好只在代码中使用实例名称,因为这在编译时会被检查,并且不会产生额外的运行时开销).非常感谢我完成了这项工作,但我必须将var curButton更改为字符串,并仅跟踪curButton而不是curButton.name。但是,当释放leftArrow时,对象会一直向左移动,直到按下另一个按钮