cocos2d-x - cocos2d-X中CCNode的CCTouch事件

Question

我试图搜索但找不到所需的答案，谁能告诉我 CCNode 的 CCTouch 事件是什么？因为我们有 CCTouchBegan、CCTouchMoved 和 CCTouchEnded 用于 CCLayer

Answer 1

CCLayer 是 CCNode 的子类，因此您可以使用所有相同的功能；

像这样的东西

HelloWorldScene.h

virtual bool ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
virtual void ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
virtual void ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
virtual void ccTouchCancelled(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);

HelloWorldScene.cpp

bool HelloWorld::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){ 
printf("ccTouchBegan");

return true;
}

void HelloWorld::ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){
printf("ccTouchMoved");
}
void HelloWorld::ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){
printf("ccTouchEnded");
}
void HelloWorld::ccTouchCancelled(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent){
printf("ccTouchCancelled"); 
}

Answer 2

CCNode 的子类也可以接收触摸事件。

假设您的子类名称是 MyNode。它必须实施——

1. CCTouchOneByOneDelegate 方法接收单点触摸事件。

2. CCTouchAllAtOnceDelegate 接收多点触控事件

注意：要添加 CCNode 的 Touch-Enabled 子类的层，在向触摸调度程序注册该层时不应吞下触摸。

类接口：

#import <Foundation/Foundation.h>
#import "cocos2d.h"
#import "CCProtocols.h"

@interface MyNode : CCNode <CCTouchOneByOneDelegate,CCTouchDelegate>//Implementing only for single touch events
{
   @private  CGSize  winSize;
}
+(MyNode*) addMyNodeToParentClass:(CCNode*)parent;

类实现：

#import "SettingsMenu.h"
@implementation SettingsMenu

+(MyNode*) addMyNodeToParentClass:(CCNode*)parent;
{
    return [[self alloc]initWithParentNode:parent];
}

-(id)initWithParentNode:(CCNode*)parent
{
    if(self=[super  init])
    {
         winSize=[CCDirector sharedDirector].winSize;

        //Registering MyNode with the TouchDispatcher
        [self registerWithTouchDispatcher];


        //adding a single sprite to check touch events
        CCSprite *sprite=[CCSprite spriteWithFile:@"information.png"];
        infoButton.position=ccp(winSize.width/2,winSize.height/2);
        [self addChild:infoButton];

        //adding this node to the parent node
        [parent addChild:self];
     }
      return self;
}

#pragma function registering with Touch Dispatcher
-(void)registerWithTouchDispatcher
{
    [[CCDirector sharedDirector].touchDispatcher addTargetedDelegate:self priority:INT_MIN+1 swallowsTouches:YES];//if any other node needs this touch do not swallow this touch

}

#pragma -CCTouchOneByOne delegate methods

-(BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{

    CGPoint touchPoint=[[CCDirector sharedDirector] convertTouchToGL:touch];

    if(CGRectContainsPoint(infoButton.boundingBox, touchPoint))
    {

        printf("\nTouch received on information button");
    }

    return  YES;
}

-(void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event
{
    CGPoint movedTouchPoint=[[CCDirector sharedDirector] convertTouchToGL:touch];
    //your code to handle touch-movement

}
-(void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event
{
    CGPoint touchEndPoint=[[CCDirector sharedDirector] convertTouchToGL:touch];
     //your code to handle touch-end
}

-(void)ccTouchCancelled:(UITouch *)touch withEvent:(UIEvent *)event
{
    //handle event for incoming SMS,Call ect.
}

#pragma -method to remove Touch Dispatcher
-(void)removeTouchDispatcher
{
    [[CCDirector sharedDirector].touchDispatcher removeDelegate:self];
}

如果MyNode需要实现多点触控事件，实现CCTouchAllAtOnceDelegate的委托方法---

////////////////////////////////////////////////////////////////
-(void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{

}
-(void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{

}
-(void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{

}
-(void)ccTouchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{

}

Answer 3

您必须与 CCNode 一起继承 CCTouchDeligate 类 查看 CCLayer.cpp 中的 CCLayer::registerWithTouchDispatcher() 函数您可以将 CCNode 添加到 CCTouchDispatcher

CCTouchDispatcher* pDispatcher = CCDirector::sharedDirector()->getTouchDispatcher();
pDispatcher->addStandardDelegate(this, 0);

完成此操作后，您将收到回调

void ccTouchesBegan(...), ccTouchesMoved(...), ccTouchesEnded(...)

Answer 4

CCNode 无法检测到触摸事件。触摸事件仅由 CCLayer 检测，CCLayer 继承自 CCNode，因此它具有 CCNode 的所有属性和额外的检测触摸事件的功能。

你可以查看我的博客http://www.touchscreenstudio.com/，这是一个新开始的博客，我将逐篇介绍所有 cocos2d-x 的内容。