2007-08-07
ASCB阅读笔记一、ActionScript Basics
关键字: AS
1,使用trace来debug程序
2,使用addEventListener来处理事件
3,实例方法和类方法
4,数据类型、循环、条件判断、异常处理等都类似于JavaScript,package、import、类继承、对象、方法都类似于Java
package {
import flash.display.Sprite;
public class ExampleApplication extends Sprite {
public function ExampleApplication() {
var userName:String = "Bill Smith";
trace("My name is " + userName + ".");
}
}
}
2,使用addEventListener来处理事件
package {
import flash.display.Sprite;
import flash.events.MouseEvent;
public class ExampleApplication extends Sprite {
private var _sprite:Sprite;
public function ExampleApplication() {
_sprite = new Sprite();
addChild(_sprite);
_sprite.graphics.beginFill(0xffffff);
_sprite.graphics.drawRect(0, 0, 400, 400);
_sprite.graphics.endFill();
_sprite.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
_sprite.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
}
private function onMouseDown(event:MouseEvent):void {
_sprite.graphics.lineStyle(1, 0, 1);
_sprite.graphics.moveTo(mouseX, mouseY);
_sprite.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
}
private function onMouseUp(event:MouseEvent):void
{
_sprite.removeEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
}
private function onMouseMove(event:MouseEvent):void {
_sprite.graphics.lineTo(mouseX, mouseY);
}
}
}
3,实例方法和类方法
package {
import flash.display.Sprite;
public class ExampleApplication extends Sprite
{
public function ExampleApplication() {
for(var i:int=0;i<10;i++) {
drawLine();
}
}
private function drawLine():void {
graphics.lineStyle(1, Math.random() * 0xffffff, 1);
graphics.moveTo(Math.random() * 400, Math.random() * 400);
graphics.lineTo(Math.random() * 400, Math.random() * 400);
}
}
}
public static function showMessage():void {
trace("Hello world");
}
ExampleApplication.showMessage();
4,数据类型、循环、条件判断、异常处理等都类似于JavaScript,package、import、类继承、对象、方法都类似于Java
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