这是我參照之前在iOS项目中用过的一个不规则形状按钮的第三方Button,这里用Cocos2d-x实现一个类似功能的按钮。

原文地址：http://blog.csdn.net/qqmcy/article/details/26161339

代码下载:http://download.csdn.net/detail/qqmcy/7365843

用法：

.h

//
//  TestScene.h
//  maptest
//
//  Created by 杜甲 on 14-5-18.
//
//#ifndef __maptest__TestScene__
#define __maptest__TestScene__#include "cocos2d.h"
#include "ui/CocosGUI.h"
#include "DJShapeButton.h"
USING_NS_CC;class TestScene :public Layer,public DJShapeButtonDelegate{public:static Scene* createScene();virtual bool init();CREATE_FUNC(TestScene);void buttonCallBack(DJShapeButton* sender);};#endif /* defined(__maptest__TestScene__) */

        DJShapeButton* djShapeBtn  = DJShapeButton::create("res/red/1300_r.png");djShapeBtn->setDelegate(this);//设置tagdjShapeBtn->setShapeBtnTag(1000);djShapeBtn->setPosition(Point(0, 40));addChild(djShapeBtn);

回调函数

void TestScene::buttonCallBack(DJShapeButton *sender)
{log("%d",sender->getTag());
}

DJShapeButton.h不规则形状Button类

//
//  DJShapeButton.h
//  maptest
//
//  Created by 杜甲 on 14-5-18.
//
//#ifndef __maptest__DJShapeButton__
#define __maptest__DJShapeButton__class DJShapeButton;class DJShapeButtonDelegate {public:virtual void buttonCallBack(DJShapeButton* sender) = 0;};#include "cocos2d.h"
#include "ui/CocosGUI.h"USING_NS_CC;class DJShapeButton :public ui::Layout{public:static DJShapeButton* create(const std::string& normalImage);CC_SYNTHESIZE(DJShapeButtonDelegate*, _delegateBtn, Delegate);virtual bool init(const std::string& normalImage);CC_SYNTHESIZE_RETAIN(Sprite*,  shapeBtn, ShapeBtn);void setShapeBtnTag(int tag);
private:bool isSwallow ;};#endif /* defined(__maptest__DJShapeButton__) */

DJShapeButton.cpp

//
//  DJShapeButton.cpp
//  maptest
//
//  Created by 杜甲 on 14-5-18.
//
//#include "DJShapeButton.h"
DJShapeButton* DJShapeButton::create(const std::string &normalImage)
{DJShapeButton *pRet = new DJShapeButton();if (pRet && pRet->init(normalImage)){pRet->autorelease();return pRet;}else{delete pRet;pRet = NULL;return NULL;}}
bool DJShapeButton::init(const std::string &normalImage)
{bool bRet = false;do {CC_BREAK_IF(!ui::Layout::init());Image* myImg = new Image();myImg->initWithImageFile(normalImage);Texture2D* temp = new Texture2D();temp->initWithImage(myImg);shapeBtn =Sprite::createWithTexture(temp);log("%f,%f",shapeBtn->getAnchorPoint().x ,shapeBtn->getAnchorPoint().y);log("width = %f,height = %f",shapeBtn->getContentSize().width , shapeBtn->getContentSize().height);addChild(shapeBtn);this->setSize(shapeBtn->getContentSize());shapeBtn->setPosition(Point(getSize().width / 2, getSize().height / 2));auto listener1 = EventListenerTouchOneByOne::create();listener1->onTouchBegan = [=](Touch* touch, Event* event){auto target = static_cast<Sprite*>(event->getCurrentTarget());Point locationInNode = target->convertToNodeSpace(touch->getLocation());Color4B c = {0,0,0,0};Point pt = Point(locationInNode.x, target->getContentSize().height - locationInNode.y);Size s = target->getContentSize();Rect rect = Rect(0, 0, s.width, s.height);if (rect.containsPoint(locationInNode)) {log("sprite began... x = %f, y = %f", locationInNode.x, locationInNode.y);unsigned int x = pt.x, y = pt.y;unsigned char* data = myImg->getData();unsigned int* pixel = (unsigned int*)data;pixel = pixel + (y * 116) + x;c.r = *pixel & 0xff;c.g = (*pixel >> 8 ) & 0xff;c.b = (*pixel >> 16) & 0xff;c.a = (*pixel >> 24) & 0xff;log("8888888888%d",c.a);if (c.a <= 4) {isSwallow = false;}else{isSwallow = true;}}else{isSwallow = false;}listener1->setSwallowTouches(isSwallow);return isSwallow;};listener1->onTouchEnded =  [=](Touch* touch, Event* event){if (_delegateBtn != nullptr) {_delegateBtn->buttonCallBack(this);}};_eventDispatcher->addEventListenerWithSceneGraphPriority(listener1, shapeBtn);bRet = true;} while (0);return bRet;
}void DJShapeButton::setShapeBtnTag(int tag)
{shapeBtn->setTag(tag);setTag(tag);}