C++ 如何在cocos2d-x中设置图层的背景颜色？
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How to set background color of layer in cocos2d-x?
提问by Edward
I've been writing a game using cocos2d-x and ran into an issue with changing the background color. I found an examplein cocos2d, but apparently this only applies to cocos2d which is written in Obj-c. Basically the idea is to use a CCLayerColor instead of CCLayer, and when the constructor gets fired set the color.
我一直在使用 cocos2d-x 编写游戏，但遇到了更改背景颜色的问题。我在 cocos2d 中找到了一个例子，但显然这仅适用于用 Obj-c 编写的 cocos2d。基本上这个想法是使用 CCLayerColor 而不是 CCLayer，并且当构造函数被触发时设置颜色。
Does anyone know how to change the background color in cocos2d-x? Seems like it would be pretty simple, I'm pretty sure I'm missing something obvious.
有谁知道如何在 cocos2d-x 中更改背景颜色？看起来这很简单，我很确定我错过了一些明显的东西。
回答by Jinbom Heo
2.X or below
2.X 或以下
Extend CCLayerColorinstead of CCLayer. For example,
扩展CCLayerColor而不是CCLayer. 例如，
class CommonScene : public cocos2d::CCLayerColor
{
public:
...
}
Initialize with this code:
使用以下代码初始化：
bool CommonScene::init()
{
//////////////////////////////
// 1. super init first
if( !CCLayerColor::initWithColor(ccc4(255, 255, 255, 255)) ) //RGBA
{
return false;
}
...
}
If you want to change background use the setColormethod from CCLayerColor. For example,
如果你想改变的背景使用setColor的方法CCLayerColor。例如，
this->setColor(ccc3(255, 255, 255));
3.0 or above
3.0或以上
Modify above code like this:
像这样修改上面的代码：
Header file (.h)
头文件 (.h)
class CommonScene : public cocos2d::LayerColor
Source file (.cpp)
源文件 (.cpp)
if( !LayerColor::initWithColor(Color4B(255,255,255,255)) )
回答by superm0
In cocos2d-x v.3.x, you can add a LayerColor inside the init method like this:
在 cocos2d-x v.3.x 中，您可以像这样在 init 方法中添加一个 LayerColor：
auto bg = cocos2d::LayerColor::create(Color4B(53, 53, 53, 255));
this->addChild(bg);
回答by ekscrypto
The easiest way I could locate that does not impact performance, is to simply do:
我可以找到不影响性能的最简单方法是简单地执行以下操作：
glClearColor(1.0,1.0,1.0,1.0);
Somewhere in your Scene init() function. This way you do not have to change to a LayerColor and performance is not affected either. Cheers!
在你的场景 init() 函数中的某个地方。这样您就不必更改为 LayerColor 并且性能也不会受到影响。干杯!
回答by Jonathan Liu
For Cocos2d-x v3.0
对于 Cocos2d-x v3.0
In *.h
在 *.h
class PlayScene : public cocos2d::LayerColor
In *.cpp
在 *.cpp 中
bool PlayScene::init()
{
if ( !LayerColor::initWithColor(Color4B(255, 255, 255, 255) )) {
return false;
}
return true;
}
