1、用处
用于管理Layer的切换，而不用切换场景。
2、代码
1）.h文件
#include "cocos2d.h"
#include "ui/CocosGUI.h"
#include "VisibleRect.h"
USING_NS_CC;
using namespace ui;
class LayerMultiplexDemo : public Scene
{
public:
CREATE_FUNC(LayerMultiplexDemo);
virtual bool init();
};
class BaseLayer : public Layer
{
public:
CREATE_FUNC(BaseLayer);
virtual bool init();
Text* text;
Size winSize;
};
class MainLayer : public BaseLayer
{
public:
CREATE_FUNC(MainLayer);
virtual bool init();
void menuCallback1(Ref* sender);
void menuCallback2(Ref* sender);
void menuCallback3(Ref* sender);
};
class Layer1 : public BaseLayer
{
public:
CREATE_FUNC(Layer1);
virtual bool init();
void touchEvent(cocos2d::Ref *pSender, cocos2d::ui::Widget::TouchEventType type);
};
class Layer2 : public BaseLayer
{
public:
CREATE_FUNC(Layer2);
virtual bool init();
void touchEvent(cocos2d::Ref *pSender, cocos2d::ui::Widget::TouchEventType type);
};
class Layer3 : public BaseLayer
{
public:
CREATE_FUNC(Layer3);
virtual bool init();
void touchEvent(cocos2d::Ref *pSender, cocos2d::ui::Widget::TouchEventType type);
};
2）.cpp文件
#include "LayerMultiplexDemo.h"
bool LayerMultiplexDemo::init()
{
bool bRet = false;
do{
CC_BREAK_IF(!Scene::init());
MenuItemFont::setFontSize(20);
auto layer= MainLayer::create();
auto layer1 = Layer1::create();
auto layer2 = Layer2::create();
auto layer3 = Layer3::create();
auto layerMultiplex = LayerMultiplex::create(layer,layer1, layer2, layer3, nullptr);
addChild(layerMultiplex, 0);
bRet = true;
}while(0);
return bRet;
}
bool BaseLayer::init()
{
bool bRet = false;
do{
CC_BREAK_IF(!Layer::init());
winSize = Director::getInstance()->getWinSize();
text = Text::create();
text->setFontSize(40);
text->setPosition(Vec2(winSize.width/2,winSize.height - 100));
addChild(text);
bRet = true;
}while(0);
return bRet;
}
bool MainLayer::init()
{
bool bRet = false;
do{
CC_BREAK_IF(!BaseLayer::init());
text->setString("Hello! This is MainLayer!");
auto label1 = Label::createWithBMFont("bitmapFontTest3.fnt", "Layer 1");
auto item1 = MenuItemLabel::create(label1, CC_CALLBACK_1(MainLayer::menuCallback1, this));
auto label2 = Label::createWithBMFont("bitmapFontTest3.fnt", "Layer 2");
auto item2 = MenuItemLabel::create(label2, CC_CALLBACK_1(MainLayer::menuCallback2, this));
auto label3 = Label::createWithBMFont("bitmapFontTest3.fnt", "Layer 3");
auto item3 = MenuItemLabel::create(label3, CC_CALLBACK_1(MainLayer::menuCallback3, this));
auto menu = Menu::create(item1,item2,item3,nullptr);
menu->alignItemsVertically();
addChild(menu);
menu->setPosition(Vec2(winSize.width/2,winSize.height/2));
bRet = true;
}while(0);
return bRet;
}
void MainLayer::menuCallback1(cocos2d::Ref *sender)
{
static_cast(_parent)->switchTo(1);
}
void MainLayer::menuCallback2(cocos2d::Ref *sender)
{
static_cast(_parent)->switchTo(2);
}
void MainLayer::menuCallback3(cocos2d::Ref *sender)
{
static_cast(_parent)->switchTo(3);
}
bool Layer1::init()
{
bool bRet = false;
do{
CC_BREAK_IF(!BaseLayer::init());
text->setString("Hello! This is Layer1");
auto layout = Layout::create();
layout->setContentSize(Size(300,300));
layout->setBackGroundColorType(cocos2d::ui::Layout::BackGroundColorType::SOLID);
layout->setBackGroundColor(Color3B::GRAY);
layout->ignoreAnchorPointForPosition(false);
layout->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
layout->setPosition(Vec2(winSize.width/2,winSize.height/2));
addChild(layout);
auto button = Button::create("btn-about-normal.png","btn-about-selected.png");
button->setPosition(Vec2(layout->getContentSize().width/2,layout->getContentSize().height/2));
layout->addChild(button);
button->addTouchEventListener(CC_CALLBACK_2(Layer1::touchEvent, this));
bRet = true;
}while(0);
return bRet;
}
void Layer1::touchEvent(cocos2d::Ref *pSender, cocos2d::ui::Widget::TouchEventType type)
{
static_cast(_parent)->switchTo(0);
}
bool Layer2::init()
{
bool bRet = false;
do{
CC_BREAK_IF(!BaseLayer::init());
text->setString("Hello! This is Layer2");
auto layout = Layout::create();
layout->setContentSize(Size(300,300));
layout->setBackGroundColorType(cocos2d::ui::Layout::BackGroundColorType::SOLID);
layout->setBackGroundColor(Color3B::GRAY);
layout->ignoreAnchorPointForPosition(false);
layout->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
layout->setPosition(Vec2(winSize.width/2,winSize.height/2));
addChild(layout);
auto button = Button::create("btn-about-normal.png","btn-about-selected.png");
button->setPosition(Vec2(layout->getContentSize().width/2,layout->getContentSize().height/2));
layout->addChild(button);
button->addTouchEventListener(CC_CALLBACK_2(Layer2::touchEvent, this));
bRet = true;
}while(0);
return bRet;
}
void Layer2::touchEvent(cocos2d::Ref *pSender, cocos2d::ui::Widget::TouchEventType type)
{
static_cast(_parent)->switchTo(0);
}
bool Layer3::init()
{
bool bRet = false;
do{
CC_BREAK_IF(!BaseLayer::init());
text->setString("Hello! This is Layer3");
auto layout = Layout::create();
layout->setContentSize(Size(300,300));
layout->setBackGroundColorType(cocos2d::ui::Layout::BackGroundColorType::SOLID);
layout->setBackGroundColor(Color3B::GRAY);
layout->ignoreAnchorPointForPosition(false);
layout->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
layout->setPosition(Vec2(winSize.width/2,winSize.height/2));
addChild(layout);
auto button = Button::create("btn-about-normal.png","btn-about-selected.png");
button->setPosition(Vec2(layout->getContentSize().width/2,layout->getContentSize().height/2));
layout->addChild(button);
button->addTouchEventListener(CC_CALLBACK_2(Layer3::touchEvent, this));
bRet = true;
}while(0);
return bRet;
}
void Layer3::touchEvent(cocos2d::Ref *pSender, cocos2d::ui::Widget::TouchEventType type)
{
static_cast(_parent)->switchTo(0);
}
3、使用效果
