ios - 拍摄ios cocos2d应用的快照

Question

有一种有效的方法可以做到这一点吗？目前我使用

[renderTexture begin];
[self.view visit];
[renderTexture end];

但应用程序因此而抖动。

我读到我可以为此复制帧缓冲区的内容。真的吗？有人可以指导我怎么做。

Answer 1

我使用了一种对我有用的方法。它会截图，然后选择一个框架。您可以对其进行更改，以便从整个屏幕上截取屏幕截图。
这是代码。

-(UIImage*) takeScreenShot
{
[CCDirector sharedDirector].nextDeltaTimeZero = YES;
CGSize winSize = [CCDirector sharedDirector].winSize;

//aux layer to make screenshot
CCLayerColor* blankLayer = [CCLayerColor layerWithColor:ccc4(255, 255, 255, 0) width:winSize.width height:winSize.height];

blankLayer.position = ccp(winSize.width/2, winSize.height/2);

CCRenderTexture* rtx = [CCRenderTexture renderTextureWithWidth:winSize.width height:winSize.height];

//this part is the same as yours
[rtx begin];
[blankLayer visit];
[[[CCDirector sharedDirector] runningScene] visit];
[rtx end];


//this part makes a rectangle from the screenshot with size.width and 200 height. Change it

UIImage *tempImage =[rtx getUIImage];
CGRect imageBoundary = CGRectMake(0, 0, winSize.width, 200);
UIGraphicsBeginImageContext(imageBoundary.size);
CGContextRef context = UIGraphicsGetCurrentContext();

// translated rectangle for drawing sub image
CGRect drawRect = CGRectMake(-imageBoundary.origin.x, -imageBoundary.origin.y, tempImage.size.width, tempImage.size.height);

// clip to the bounds of the image context
CGContextClipToRect(context, CGRectMake(0, 0, imageBoundary.size.width, imageBoundary.size.height));

// draw image
[tempImage drawInRect:drawRect];
UIImage* subImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();


return subImage;

//and there you have an UIImage 


}

制作屏幕一部分的屏幕截图时，此代码效果很好。也许您可以尝试删除使用CGRect生成临时图像的代码部分。但我建议您更改如下值:

CGRect imageBoundary = CGRectMake(0, 0, winSize.width, winSize.height);

这样就可以制作完整的屏幕截图。