iphone - 如何捕获同时包含 cocs2d 和 UIKit 的 View 的屏幕截图

Question

我正在 iOS6 中开发一个 iPad 应用程序，显示不同颜色和纹理的房屋设计。为此，我正在使用 cocos2d。为了在家里显示使用过的纹理和颜色，我正在使用 UIKit View 。
现在我想截取这个 View 的截图，其中包含 cocos2d 层和 UIKit View 。
如果我使用 cocos2d 进行屏幕截图，例如:

UIImage *screenshot = [AppDelegate screenshotWithStartNode:n];

那么它只是拍摄 cocos2d 层的快照。

否则，如果我使用 UIkit 进行屏幕截图，例如:

UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();

那么它只捕获 UIKit 组件并关闭 cocos2d 部分。

我希望他们两个在同一个屏幕截图中......

Answer 1

尝试这种方法，只需根据您的要求更改一些代码..

-(UIImage*) screenshotUIImage
{
    CGSize displaySize  = [self displaySize];
    CGSize winSize      = [self winSize];

    //Create buffer for pixels
    GLuint bufferLength = displaySize.width * displaySize.height * 4;
    GLubyte* buffer = (GLubyte*)malloc(bufferLength);

    //Read Pixels from OpenGL
    glReadPixels(0, 0, displaySize.width, displaySize.height, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
    //Make data provider with data.
    CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, buffer, bufferLength, NULL);

    //Configure image
    int bitsPerComponent = 8;
    int bitsPerPixel = 32;
    int bytesPerRow = 4 * displaySize.width;
    CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
    CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
    CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;
    CGImageRef iref = CGImageCreate(displaySize.width, displaySize.height, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);

    uint32_t* pixels = (uint32_t*)malloc(bufferLength);
    CGContextRef context = CGBitmapContextCreate(pixels, winSize.width, winSize.height, 8, winSize.width * 4, CGImageGetColorSpace(iref), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);

    CGContextTranslateCTM(context, 0, displaySize.height);
    CGContextScaleCTM(context, 1.0f, -1.0f);

    switch (deviceOrientation_)
    {
        case CCDeviceOrientationPortrait: break;
        case CCDeviceOrientationPortraitUpsideDown:
            CGContextRotateCTM(context, CC_DEGREES_TO_RADIANS(180));
            CGContextTranslateCTM(context, -displaySize.width, -displaySize.height);
            break;
        case CCDeviceOrientationLandscapeLeft:
            CGContextRotateCTM(context, CC_DEGREES_TO_RADIANS(-90));
            CGContextTranslateCTM(context, -displaySize.height, 0);
            break;
        case CCDeviceOrientationLandscapeRight:
            CGContextRotateCTM(context, CC_DEGREES_TO_RADIANS(90));
            CGContextTranslateCTM(context, displaySize.width * 0.5f, -displaySize.height);
            break;
    }

    CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, displaySize.width, displaySize.height), iref);
    CGImageRef imageRef = CGBitmapContextCreateImage(context);
    UIImage *outputImage = [UIImage imageWithCGImage:imageRef];

    //Dealloc
    CGImageRelease(imageRef);
    CGDataProviderRelease(provider);
    CGImageRelease(iref);
    CGColorSpaceRelease(colorSpaceRef);
    CGContextRelease(context);
    free(buffer);
    free(pixels);

    return outputImage;
}

- (Texture2D*) screenshotTexture {
    return [[Texture2D alloc] initWithImage:[self screenshotUIImage]];
}

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