Question

package
{
    import flash.display.*;
    import flash.events.*;
    import flash.net.URLRequest;

    public class Main extends MovieClip
    {
        // state
        private var iname:String = "image.gif";
        private var w:int;
        private var h:int;
        private var loader:Loader;

        // constructor
        public function Main():void
        {
            loadImage( iname ); 
            trace( w + " " + h );

        }

        // methods
        private function loadImage( filename:String ):void
        {
            loader = new Loader();
            loader.contentLoaderInfo.addEventListener( Event.COMPLETE, completeHandler );
            loader.contentLoaderInfo.addEventListener( Event.COMPLETE, someHandler );
            var request:URLRequest = new URLRequest( filename );
            loader.load( request );
            this.addChild( loader );        
        }



        // event handlers
        private function completeHandler( event:Event ):void
        {           
            trace( "image loaded\n" + event.target.url );
            trace( event.target );
        }           

        private function someHandler( event:Event ):void
        {
            w = loader.contentLoaderInfo.width;
            h = loader.contentLoaderInfo.height;            
        }
    }
}

但是当我跑步时我的宽度和高度都是0 0。我怎样才能得到正确的值？此外，如果图片正确加载并在我将它附加到movieclip后为什么我不能从movieclip对象获取宽度和高度？

Answer 1

仅仅是我还是在完成事件发生之前要求宽度和高度？如果在设置它们之后将w和h跟踪移动到“someHandler”函数中，会得到什么结果？

Answer 2

图像的加载不是即时的跟踪一个Event.COMPLETE处理程序的宽度和高度，它会正常工作！

Answer 3

你要求的是contentLoaderInfo.height ...你应该要求内容高度。

h = event.target.content.height;
w = event.target.content.width;

如何从Loader对象获取宽度和高度

3 个答案: