截取具有CATransform3DMakeRotation子视图的UIView的屏幕截图

Question

我正在尝试生成具有子视图的UIView的屏幕截图CATransform3DMakeRotation.屏幕截图已生成,但不包含"旋转".

是否有可能实现这一目标？

实际观点:

ScreenShot图像

使用以下调用水平翻转视图...

  currentView.layer.transform = CATransform3DConcat(currentView.layer.transform,CATransform3DMakeRotation(M_PI, 0.0, 1.0, 0.0f));

拍摄屏幕截图的代码

+ (UIImage *) imageWithView:(UIView *)view
{
    CGSize screenDimensions = view.bounds.size;

    // Create a graphics context with the target size
    // (last parameter takes scale into account)
    UIGraphicsBeginImageContextWithOptions(screenDimensions, NO, 0);

    // Render the view to a new context
    CGContextRef context = UIGraphicsGetCurrentContext();
    [view.layer renderInContext:context];

    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();    
    UIGraphicsEndImageContext();

    return img;
}

Answer 1

"renderInContext"仅适用于仿射变换.因此,将3D变换转换为仿射变换

currentView.layer.affineTransform = CATransform3DGetAffineTransform(CATransform3DConcat(currentView.layer.transform,CATransform3DMakeRotation(M_PI, 0.0, 1.0, 0.0f)));