事件监听器主要有:
-
触摸事件 : EventListenerTouchOneByOne、EventListenerTouchAllAtOnce
-
鼠标响应事件 : EventListenerMouse
-
键盘响应事件 : EventListenerKeyboard
-
加速计事件 : EventListeneracceleration
-
自定义事件 : EventListenerCustom
-
物理碰撞事件 : EventListenerPhysicsContact
-
游戏手柄事件 : EventListenerController
-
事件监听器统一由_eventdispatcher来进行管理,_eventdispatcher是Node的属性,通过Director::getInstance()->getEventdispatcher() 获得。它的工作需要三部分组成:
事件分发器 Eventdispatcher
事件类型 EventTouch,EventKeyboard 等
事件监听器 EventListenerTouch,EventListenerKeyboard 等
-
【触摸事件】
1、单点触摸:EventListenerTouchOneByOne
单点触摸监听器相关:
12345static
EventListenerTouchOneByOne*create();
std::function<
bool
(Touch*,Event*)>onTouchBegan;
//只有这个返回值为bool
std::function<
void
(Touch*,Event*)>onTouchMoved;
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,Event*)>onTouchEnded;
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,Event*)>onTouchCancelled;
使用举例:
5
67891011121314151617181920//获取事件分发器//创建单点触摸监听器EventListenerTouchOneByOne
autotouchListener=EventListenerTouchOneByOne::create();
//单点触摸响应事件绑定
touchListener->onTouchBegan=CC_CALLBACK_2(HelloWorld::onTouchBegan,
this
);
touchListener->onTouchMoved=CC_CALLBACK_2(HelloWorld::onTouchMoved,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">);
touchListener->onTouchEnded=CC_CALLBACK_2(HelloWorld::onTouchEnded,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">);
touchListener->onTouchCancelled=CC_CALLBACK_2(HelloWorld::onTouchCancelled,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">);
//在事件分发器中,添加触摸监听器,事件响应委托给this处理
dispatcher->addEventListenerWithSceneGraPHPriority(touchListener,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">);
/
/单点触摸事件响应函数
onTouchMoved(Touch*touch,monospace!important; font-size:1em!important; min-height:inherit!important; color:blue!important; background:none!important">"moved"
);}
onTouchEnded(Touch*touch,monospace!important; font-size:1em!important; min-height:inherit!important; color:blue!important; background:none!important">"ended"
);}
onTouchCancelled(Touch*touch,monospace!important; font-size:1em!important; min-height:inherit!important; color:blue!important; background:none!important">"cancelled"
);}
2、多点触摸:EventListenerTouchAllAtOnce
多点触摸监听器相关:
6
EventListenerTouchAllAtOnce*create(); ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,Event*)>ontouchesMoved;
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,Event*)>ontouchesEnded;
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,Event*)>ontouchesCancelled;
使用举例:
20
//创建多点触摸监听器EventListenerTouchAllAtOnce autotouchesListener=EventListenerTouchAllAtOnce::create();
//多点触摸响应事件绑定
touchesListener->ontouchesBegan=CC_CALLBACK_2(HelloWorld::ontouchesBegan,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">touchesListener->ontouchesMoved=CC_CALLBACK_2(HelloWorld::ontouchesMoved,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">touchesListener->ontouchesEnded=CC_CALLBACK_2(HelloWorld::ontouchesEnded,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">touchesListener->ontouchesCancelled=CC_CALLBACK_2(HelloWorld::ontouchesCancelled,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">dispatcher->addEventListenerWithSceneGraPHPriority(touchesListener,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">
//多点触摸事件响应函数ontouchesBegan(
std::vector<Touch*>&touches,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">);}
ontouchesMoved(
ontouchesEnded(
ontouchesCancelled(
【鼠标事件】
EventListenerMouse,主要用于监听鼠标的点击、松开、移动、滚轮的事件。
鼠标事件监听器相关:
6
EventListenerMouse*create(); (Event*event)>onMouseDown;
//按下鼠标,单击鼠标
(Event*event)>onmouseup;
//松开鼠标,按下的状态下松开
(Event*event)>onMouseMove;
//移动鼠标,在屏幕中移动
(Event*event)>onMouseScroll;
//滚动鼠标,滚动鼠标的滚轮
20
2122
//获取事件分发器
//创建鼠标事件监听器EventListenerMouse
EventListenerMouse*mouseListenter=EventListenerMouse::create();
//鼠标事件响应函数
mouseListenter->onMouseDown=CC_CALLBACK_1(HelloWorld::onMouseDown,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">mouseListenter->onmouseup=CC_CALLBACK_1(HelloWorld::onmouseup,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">mouseListenter->onMouseMove=CC_CALLBACK_1(HelloWorld::onMouseMove,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">mouseListenter->onMouseScroll=CC_CALLBACK_1(HelloWorld::onMouseScroll,0)!important; background:none!important">//添加鼠标事件监听器,事件响应处理委托给this
dispatcher->addEventListenerWithSceneGraPHPriority(mouseListenter,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">
//事件响应函数
onMouseDown(Event*event){cclOG(
"Down"
onmouseup(Event*event){cclOG(
"UP"
onMouseMove(Event*event){cclOG(
"MOVE"
onMouseScroll(Event*event){cclOG(
"Scroll"
【键盘事件】
EventListenerKeyboard,主要用于监听键盘某个键的按下、松开的事件。
键盘事件监听器相关:
14
EventListenerKeyboard*create(); (EventKeyboard::KeyCode,Event*)>onKeypressed;
//按下某键
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,Event*)>onkeyreleased;
//松开某键
//键盘按键枚举类型EventKeyboard::KeyCode
//KeyCode的值对应的不是键盘的键值、也不是ASCII码,只是纯粹的枚举类型
//如:
//EventKeyboard::KeyCode::KEY_A
//EventKeyboard::KeyCode::KEY_1
//EventKeyboard::KeyCode::KEY_F1
//EventKeyboard::KeyCode::KEY_SPACE
//EventKeyboard::KeyCode::KEY_ALT
//EventKeyboard::KeyCode::KEY_SHIFT
22
2324//创建键盘按键事件监听器 EventListenerKeyboard*keyboardListener=EventListenerKeyboard::create();
//绑定事件响应函数
keyboardListener->onKeypressed=CC_CALLBACK_2(HelloWorld::onKeypressed,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">keyboardListener->onkeyreleased=CC_CALLBACK_2(HelloWorld::onkeyreleased,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">);
//添加监听器
dispatcher->addEventListenerWithSceneGraPHPriority(keyboardListener,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">);
//事件响应函数
onKeypressed(EventKeyboard::KeyCodekeyCode,Event*event){
if
(EventKeyboard::KeyCode::KEY_J==keyCode){
}
}
onkeyreleased(EventKeyboard::KeyCodekeyCode,Event*event){
(EventKeyboard::KeyCode::KEY_SPACE==keyCode){
"Released:SPACE"
);
}
}
【加速计事件】
EventListeneracceleration,主要用于监听移动设备的所受重力方向感应事件。
重力感应来自移动设备的加速计,通常支持 (X,Y,Z) 三个方向的加速度感应,所以又称为三向加速计。在实际应用中,可以根据3个方向的力度大小来计算手机倾斜的角度或方向。
1、加速计信息类acceleration
该类中每个方向的加速度,大小都为一个重力加速度大小。
2、开启加速计感应
在使用加速计事件监听器之前,需要先启用此硬件设备:
1
Device::setAccelerometerEnabled(
);
3、加速计监听器相关
3
EventListeneracceleration*create( const
std::function<void
(acceleration*,Event*)>&callback);
(acceleration*,Event*)>onaccelerationEvent;
4、使用举例
24
252627282930313233343536//标签:显示加速计信息 label=Label::createWithTTF(
"noused"
,
"MarkerFelt.ttf"
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,12);
label->setPosition(visibleSize/2);
->addChild(label);
//小球:可视化加速计
ball=Sprite::create(
"ball.png"
ball->setPosition(visibleSize/2);
->addChild(ball);
//获取事件分发器
//需要开启移动设备的加速计
);
//创建加速计事件监听器
autoaccelerationListener=EventListeneracceleration::create(CC_CALLBACK_2(HelloWorld::onaccelerationEvent,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">));
//添加加速计监听器
dispatcher->addEventListenerWithSceneGraPHPriority(accelerationListener,51); background-color:initial">
//事件响应函数
HelloWorld::onaccelerationEvent(acceleration*acceleration,Event*event)
{
char
s[100];
sprintf
(s,monospace!important; font-size:1em!important; min-height:inherit!important; color:blue!important; background:none!important">"X:%f;Y:%f;Z:%f;"
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,acceleration->x,acceleration->y,acceleration->z);
l
abel->setString(s);
//改变小球ball的位置
float
x=ball->getPositionX()+acceleration->x*10;
y=ball->getPositionY()+acceleration->y*10;
Vec2pos=Vec2(x,y);
pos.clamp(ball->getContentSize()/2,Vec2(288,512)-ball->getContentSize()/2);
all->setPosition(pos);
//设置位置
【自定义事件】
以上是系统自带的事件类型,事件由系统内部自动触发,如 触摸屏幕,键盘响应等。
EventListenerCustom 自定义事件,它不是由系统自动触发,而是人为的干涉。
1、创建自定义监听器
3
//eventName:监听器名字 //callback:监听器函数
static
EventListenerCustom*create(
std::string&eventName,monospace!important; font-size:1em!important; min-height:inherit!important; background:none!important">(EventCustom*)>&callback);
2、分发自定义事件
自定义的事件监听器,需要通过手动的方式,将事件分发出去。
通过 EventCustom(string eventName); 来获取自定义监听器。
通过 dispatcher->dispatchEvent(&event); 来手动将事件分发出去。
3、使用举例
20
//创建自定义事件监听器 //监听器名字:"custom_event"
//事件响应函数:HelloWorld::onCustomEvent
autocustomListener=EventListenerCustom::create(
"custom_event"
));
dispatcher->addEventListenerWithFixedPriority(customListener,1);
//手动分发监听器的事件,通过dispatchEvent
EventCustomevent=EventCustom(
);
HelloWorld::onCustomEvent(EventCustom*event)
{
"onCustomEvent"
);
}
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