用cocos2dx实现模态对话框

ui部分使用了cocoStudio，注意这里没有实现怎么屏蔽其他的输入事件，其他的文档已经太多了，我这里使用的cocoStudio的控件自己的特性。

这里强烈推荐一下cocoStudio，虽然现在还有不完善的地方，但是我个人感觉做的很不错了。

下面是代码，编译的时候请开启c++11.

//UI_ModalDialogue_Layer.h

#ifndef __UI_MODAL_DIALOGUE_LAYER_H__
#define __UI_MODAL_DIALOGUE_LAYER_H__#include "cocos2d.h"
#include "cocos-ext.h"
#include <functional>typedef std::function<void(void)> pCall;class UI_ModalDialogue_Layer : public cocos2d::extension::UILayer
{
public:enum DialogueType{DT_Normal = 0,DT_Ok,DT_Yes_No,};enum ResultTag{RT_Ok = 0,RT_YES,RT_NO,};
private:UI_ModalDialogue_Layer(void);~UI_ModalDialogue_Layer(void);CREATE_FUNC(UI_ModalDialogue_Layer);virtual bool init();public:static void DoModal(const char* szTitle,const char* szContent,DialogueType type=DT_Normal,pCall p=nullptr);static void HideModal();private:void updateLayer(const char* szTitle,const char* szContent,DialogueType type,pCall p);void btn_Click( cocos2d::CCObject* pSender );private:static UI_ModalDialogue_Layer* s_pInstance;cocos2d::extension::UILabel*    m_pLabCaption;cocos2d::extension::UILabel*    m_pLabContent;cocos2d::extension::UIButton*        m_pBtn_Ok;cocos2d::extension::UIButton*        m_pBtn_Yes;cocos2d::extension::UIButton*        m_pBtn_No;DialogueType            m_Type;pCall                    m_pFunc;
};#endif //__UI_MODAL_DIALOGUE_LAYER_H__

UI_ModalDialogue_Layer.cpp

#include "UI_ModalDialogue_Layer.h"USING_NS_CC;
USING_NS_CC_EXT;#define MODAL_DIALOGUE_ZORDER 9999UI_ModalDialogue_Layer* UI_ModalDialogue_Layer::s_pInstance = NULL;UI_ModalDialogue_Layer::UI_ModalDialogue_Layer(void)
{
}UI_ModalDialogue_Layer::~UI_ModalDialogue_Layer(void)
{}bool UI_ModalDialogue_Layer::init()
{if (!UILayer::init()){return false;}UIWidget* pWidget = CCUIHELPER->createWidgetFromJsonFile("ui/Model_Dialogue/Model_Dialogue.ExportJson");addWidget( pWidget );m_pLabCaption = (UILabel*)getWidgetByName("lbl_Caption");m_pLabContent = (UILabel*)getWidgetByName("lbl_Content");m_pBtn_Ok = (UIButton*)getWidgetByName("btn_OK");m_pBtn_Ok->addReleaseEvent(this,coco_releaseselector(UI_ModalDialogue_Layer::btn_Click));m_pBtn_Ok->setWidgetTag(RT_Ok);m_pBtn_Yes = (UIButton*)getWidgetByName("btn_Yes");m_pBtn_Yes->addReleaseEvent(this,coco_releaseselector(UI_ModalDialogue_Layer::btn_Click));m_pBtn_Yes->setWidgetTag(RT_YES);m_pBtn_No = (UIButton*)getWidgetByName("btn_No");m_pBtn_No->addReleaseEvent(this,coco_releaseselector(UI_ModalDialogue_Layer::btn_Click));m_pBtn_No->setWidgetTag(RT_NO);return true;
}void UI_ModalDialogue_Layer::btn_Click( CCObject* pSender )
{HideModal();if (m_pFunc){UIButton* pBtn = dynamic_cast<UIButton*>(pSender);CC_ASSERT( pBtn );int nTag = pBtn->getWidgetTag();if ( RT_Ok==nTag || RT_YES==nTag ){m_pFunc();}}
}void UI_ModalDialogue_Layer::updateLayer(const char* szTitle,const char* szContent,DialogueType type,pCall p)
{s_pInstance->m_pLabCaption->setText(szTitle);s_pInstance->m_pLabContent->setText(szContent);s_pInstance->m_Type = type;s_pInstance->m_pFunc = p;if (DT_Normal==s_pInstance->m_Type){m_pBtn_Ok->setVisible(false);m_pBtn_Yes->setVisible(false);m_pBtn_No->setVisible(false);}else if (DT_Ok==m_Type){m_pBtn_Ok->setVisible(true);m_pBtn_Yes->setVisible(false);m_pBtn_No->setVisible(false);}else if (DT_Yes_No==m_Type){m_pBtn_Ok->setVisible(false);m_pBtn_Yes->setVisible(true);m_pBtn_No->setVisible(true);}else{CCLOG("UI_ModalDialogue_Layer::error m_Type");}
}void UI_ModalDialogue_Layer::DoModal(const char* szTitle,const char* szContent,DialogueType type,pCall p)
{if (!s_pInstance){s_pInstance = UI_ModalDialogue_Layer::create();s_pInstance->retain(); //let it leak,that's allright
    }CC_ASSERT(s_pInstance);s_pInstance->HideModal();s_pInstance->updateLayer(szTitle,szContent,type,p);CCScene* pCurrentScene = CCDirector::sharedDirector()->getRunningScene();CC_ASSERT(pCurrentScene);pCurrentScene->addChild(s_pInstance,MODAL_DIALOGUE_ZORDER);CCLOG("UI_ModalDialogue_Layer::ShowModal()");}void UI_ModalDialogue_Layer::HideModal()
{if (s_pInstance&&s_pInstance->getParent()){s_pInstance->removeFromParent();CCLOG("UI_ModalDialogue_Layer::HideModal()");}
}