原文链接：http://www.it165.net/pro/html/201409/21451.html
1.1首先在CCDirector.h中添加如下代码：并在其中添加头文件 #include "2d/CCRenderTexture.h"
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voidsaveScreenshot(conststd::string& fileName,std::function<(std::string&)>& callback);
1.2然后在CCDirector.cpp中添加如下代码：
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Director::saveScreenshot(std::string &fileName,宋体; background:none">std::string &)> &callback)
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{
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Image::Format format;
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if(std::string::npos != fileName.find_last_of(".")){
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auto extension = fileName.substr(fileName.find_last_of(),fileName.length());
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(!extension.compare(".png")) {
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format = Image::Format::PNG;
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}else".jpg"10.
format = Image::Format::JPG;
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else{
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log("cocos2d: the image can only be saved as JPG or PNG format");
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return;
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}
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auto renderTexture = RenderTexture::create(getWinSize().width,getWinSize().height,Texture2D::PixelFormat::RGBA8888);
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//清空并开始获取
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renderTexture->beginWithClear(0.0f,.0f);
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//遍历场景节点对象，填充纹理到RenderTexture中
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getRunningScene()->visit();
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//结束获取
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renderTexture->end();
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//保存文件
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renderTexture->saveToFile(fileName,format);
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//使用schedule在下一帧中调用callback函数
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auto fullPath = FileUtils::getInstance()->getWritablePath() + fileName;
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auto scheduleCallback = [&,fullPath,callback](floatdt){
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callback(fullPath);
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};
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auto _schedule = getRunningScene()->getScheduler();
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_schedule->schedule(scheduleCallback,宋体; background:none">this,宋体; background:none">false"screenshot");
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}
1.3在HelloWorld.cpp中添加如下代码：
bool HelloWorld::init()
bool bRet =doCC_BREAK_IF(!Layout::init());
auto button = ui::Button::create("CloseNormal.png""CloseSelected.png"button->setPosition(Vec2(200));
addChild(button);
button->addTouchEventListener(CC_CALLBACK_2(HomeLayer::touchEvent,宋体; background:none">Director::getInstance()->getEventDispatcher();
bRet =true;
while(bRet;
}
HelloWorld::touchEvent(cocos2d::Ref *pSender,cocos2d::ui::Widget::TouchEventType type)
switch(type)
caseWidget::TouchEventType::ENDED:
<span style="white-space:pre"> </span>
Director::getInstance()->saveScreenshot("homeLayer.png"std::string &str){
"str = %s"
});
breakdefault:
}
1.4点击按钮，实现截图功能，最后图片保存在沙盒中，可在Xcode控制台下看到文件保存路径。
2、Cocos2d-x3.2
Cocos2d-x3.2中已经封装了截图共，使用如下
Util::captureScreen((bool,宋体; background:none">std::string&)>&afterCaptured,宋体; background:none">std::string&filename);
