registerCursor注册系统光标
自定义光标一直是用Mouse.hide()然后自己做个图形，鼠标跟随。其实flash从10.2开始就支持注册系统光标了。
鼠标跟随实现的光标总是感觉有些延时，注册系统光标效果好很多。不知道为什么很少有人用。
demo:
实现代码如下，学习的话，可以去看官方API的例子，写的很好。
package {
import flash.display.BitmapData;
import flash.display.MovieClip;
import flash.display.SimpleButton;
import flash.events.MouseEvent;
import flash.geom.Point;
import flash.text.TextField;
import flash.ui.Mouse;
import flash.ui.MouseCursor;
import flash.ui.MouseCursorData;
public class Main extends MovieClip {
public var btn:MovieClip;
public var tf:TextField;
private var text:String;
private var cursorNames:Array = ["cross", "rotateCross","auto"];
private var n:int = 0;
public function Main() {
// constructor code
trace(Mouse.supportsNativeCursor);
if (Mouse.supportsNativeCursor) {
tf.text = "支持系统光标";
}
else {
tf.text = "不支持系统光标";
}
btn.tf.text = text = cursorNames[n];
btn.gotoAndStop(1);
btn.buttonMode = true;
btn.mouseChildren = false;
btn.addEventListener(MouseEvent.CLICK, btnClickHandler);
test01();
test02();
Mouse.cursor = text;
}
private function btnClickHandler(e:MouseEvent):void
{
n++;
if (n>=cursorNames.length) {
n -= cursorNames.length;
}
btn.tf.text = text = cursorNames[n];
Mouse.cursor = text;
}
private function test02():void {
var cursorData:MouseCursorData = new MouseCursorData();
cursorData.data = new Vector.<BitmapData>();
var cursorMc:MovieClip = new CursorMc();
for (var i:int = 1, len:int = cursorMc.totalFrames; i <= len; i++ ) {
var bmd:BitmapData = new BitmapData(30,30,true,0x00000000);
cursorMc.gotoAndStop(i);
bmd.draw(cursorMc);
cursorData.data.push(bmd);
}
cursorData.hotSpot = new Point(15, 15);
cursorData.frameRate = 16;
Mouse.registerCursor("rotateCross", cursorData);
}
private function test01():void {
var cursorData:MouseCursorData = new MouseCursorData();
var bmd:BitmapData = new CrossBmd();
cursorData.data = new Vector.<BitmapData>();
cursorData.data.push(bmd);
cursorData.hotSpot = new Point(16, 16);
Mouse.registerCursor("cross", cursorData);
}
}
}Mouse.supportsNativeCursor检测系统是否支持注册光标，官方说“在大多数桌面计算机上 supportsCursor 属性为 true，而在大多数移动设备上为
false”。Mouse.registerCursor(name:String, cursor:MouseCursorData):void 注册光标。
需要new一个MouseCursorData，指定data属性，data属性是一个由BitmapData组成的向量，hotSpot属性指定光标的注册点位置，如果data里边有多个BitmapData的话，还可以指定frameRate，实现动态的光标。