flash 游戏键盘控制
package com.game.keymanager {
import flash.display.Stage;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.utils.Proxy;
import flash.utils.flash_proxy;
/**
* The KeyObject class recreates functionality of
* Key.isDown of ActionScript 1 and 2
*
* Usage:
* var key:KeyObject = new KeyObject(stage);
* if (key.isDown(key.LEFT)) { ... }
*/
dynamic public class KeyObject extends Proxy {
private static var stage:Stage;
private static var keysDown:Object;
public function KeyObject(stage:Stage) {
construct(stage);
}
public function construct(stage:Stage):void {
KeyObject.stage = stage;
keysDown = new Object();
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, keyReleased);
}
flash_proxy override function getProperty(name:*):* {
return (name in Keyboard) ? Keyboard
[name] : -1;
}
public function isDown(keyCode:uint):Boolean {
return Boolean(keyCode in keysDown);
}
public function deconstruct():void {
stage.removeEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.removeEventListener(KeyboardEvent.KEY_UP, keyReleased);
keysDown = new Object();
KeyObject.stage = null;
}
private function keyPressed(evt:KeyboardEvent):void {
keysDown
[evt.keyCode] = true;
}
private function keyReleased(evt:KeyboardEvent):void {
delete keysDown
[evt.keyCode];
}
}
}
package com.game.keymanager {
import flash.display.Stage;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.utils.Proxy;
import flash.utils.flash_proxy;
/**
* The KeyObject class recreates functionality of
* Key.isDown of ActionScript 1 and 2
*
* Usage:
* var key:KeyObject = new KeyObject(stage);
* if (key.isDown(key.LEFT)) { ... }
*/
dynamic public class KeyObject extends Proxy {
private static var stage:Stage;
private static var keysDown:Object;
public function KeyObject(stage:Stage) {
construct(stage);
}
public function construct(stage:Stage):void {
KeyObject.stage = stage;
keysDown = new Object();
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, keyReleased);
}
flash_proxy override function getProperty(name:*):* {
return (name in Keyboard) ? Keyboard[name] : -1;
}
public function isDown(keyCode:uint):Boolean {
return Boolean(keyCode in keysDown);
}
public function deconstruct():void {
stage.removeEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.removeEventListener(KeyboardEvent.KEY_UP, keyReleased);
keysDown = new Object();
KeyObject.stage = null;
}
private function keyPressed(evt:KeyboardEvent):void {
keysDown[evt.keyCode] = true;
}
private function keyReleased(evt:KeyboardEvent):void {
delete keysDown[evt.keyCode];
}
}
}
暂时不多写了，因为csdn博客出问题，经常写文章都出错。真郁闷，先发一个键盘控制的类。可以进行使用的，在网上看到的。有兴趣尝试一下。用法很简单
第二种方式：使用了一种比较简洁的方式，同样是收集网上一种写法，感觉这种做法也是可以
使用的方法 使用 if(KEY.isDown(键值))这样就可以实现控制到我们希望的对象了。
package com.hero.ImageManager
{
/*键盘按键判断类.
使用时先初始化要监听的对象.再判断哪个键被按下了.
KEY.init(stage);
KEY.isDown(40);返回true或false
*/
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.display.DisplayObject;
public class KEY {
private static var keyObj:KEY = null;
private static var keys:Object;
public static function init(_stage:DisplayObject):void {
if (keyObj == null) {
keys = {};
_stage.addEventListener(KeyboardEvent.KEY_DOWN, KEY.keyDownHandler);
_stage.addEventListener(KeyboardEvent.KEY_UP, KEY.keyUpHandler);
}
}
public static function isDown( keyCode:uint ):Boolean {
return keys
[keyCode];
}
private static function keyDownHandler( e:KeyboardEvent ):void {
keys
[e.keyCode] = true;
trace( keys
[e.keyCode]);
}
private static function keyUpHandler( e:KeyboardEvent ):void {
delete keys
[e.keyCode];
}
}
}
package com.hero.ImageManager
{
/*键盘按键判断类.
使用时先初始化要监听的对象.再判断哪个键被按下了.
KEY.init(stage);
KEY.isDown(40);返回true或false
*/
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.display.DisplayObject;
public class KEY {
private static var keyObj:KEY = null;
private static var keys:Object;
public static function init(_stage:DisplayObject):void {
if (keyObj == null) {
keys = {};
_stage.addEventListener(KeyboardEvent.KEY_DOWN, KEY.keyDownHandler);
_stage.addEventListener(KeyboardEvent.KEY_UP, KEY.keyUpHandler);
}
}
public static function isDown( keyCode:uint ):Boolean {
return keys[keyCode];
}
private static function keyDownHandler( e:KeyboardEvent ):void {
keys[e.keyCode] = true;
trace( keys[e.keyCode]);
}
private static function keyUpHandler( e:KeyboardEvent ):void {
delete keys[e.keyCode];
}
}
}
第三种是使用：开关式的判断
private var Isleft:Boolean; private var Isright:Boolean; private var Isup:Boolean; private var Isdown:Boolean; stage.addEventListener(KeyboardEvent.KEY_DOWN,keydown); stage.addEventListener(KeyboardEvent.KEY_UP,keyup);
进行简单判定
private function keydown(event:Event):void
{
if (event.keyCode==Keyboard.UP)
{
Isup=true;
}
else if (event.keyCode==Keyboard.DOWN)
{
Isdown=true;
}
else if (event.keyCode==Keyboard.LEFT)
{
Isleft=true;
}
else if (event.keyCode==Keyboard.RIGHT)
{
Isright=true;
}
}
private function keyup(event:Event):void
{
if (event.keyCode==Keyboard.UP)
{
Isup=false;
}
else if (event.keyCode==Keyboard.DOWN)
{
Isdown=false;
}
else if (event.keyCode==Keyboard.LEFT)
{
Isleft=false;
}
else if (event.keyCode==Keyboard.RIGHT)
{
Isright=false;
}
}
private function keydown(event:Event):void
{
if (event.keyCode==Keyboard.UP)
{
Isup=true;
}
else if (event.keyCode==Keyboard.DOWN)
{
Isdown=true;
}
else if (event.keyCode==Keyboard.LEFT)
{
Isleft=true;
}
else if (event.keyCode==Keyboard.RIGHT)
{
Isright=true;
}
}
private function keyup(event:Event):void
{
if (event.keyCode==Keyboard.UP)
{
Isup=false;
}
else if (event.keyCode==Keyboard.DOWN)
{
Isdown=false;
}
else if (event.keyCode==Keyboard.LEFT)
{
Isleft=false;
}
else if (event.keyCode==Keyboard.RIGHT)
{
Isright=false;
}
}
通过开关式的组合方式进行组合，这种也是一种常见的方式。
通过使用上面三种方式，我们可以简化我们在键盘上的控制。我个人还比较喜欢这三种方式。
通过上面的键盘控制，还可以配合到动画进行创作。
addEventListener(Event.ENTER_FRAME,GameLoop);
好，有兴趣可以把这些使用方式记录下来组合自己的键盘控制方式。