Question

我在AS3中遇到Pan手势问题。据我所知，做到这一点：

function fl_PanHandler(event:TransformGestureEvent):void
{
    if (escenario.scaleX && escenario.scaleY == 1)
        {
            trace("MAX ZOOM!");
        }
    else
        {
            event.currentTarget.x +=  event.offsetX;
            event.currentTarget.y +=  event.offsetY;
        }
}

好。现在，如果我进行缩放，比例将超过1，所以，我将能够平移。但是平移到了我正在缩放的MovieClip之外。

该项目是500x500，因此，我需要仅在500x500中进行平移而不是闪光灯的白色背景（500x500的项目具有黑色背景，在MC中，是将要淘汰的MC。

Answer 1

你只需要加入一些约束：

var target:DisplayObject = event.currentTarget as DisplayObject;
target.x +=  event.offsetX;
target.y +=  event.offsetY;

//if the x or y is greater than 0, that means you can see the left/top edge of the target, so make it go back to 0
if(target.x > 0) target.x = 0;
if(target.y > 0) target.y = 0;

//the stage width less the target width should be negative so long as the target is bigger than the stage.  
//It will get the x point that would make the right edge line up with the stage's right edge.
if(target.x < stage.stageWidth - target.width){
    //so if the x is less than that point (which would make the right edge of target visible), force the x back so the right edges align
    target.x = stage.stageWidth - target.width;
}

if(target.y < stage.stageHeight - target.height){
    target.y = stage.stageHeight - target.height);
}

Zoom＆amp;平移问题（AS3）

1 个答案: