如何对视图进行快照包含GLKView

Question

我有一个viewA，它包含一个GLKView和子视图作为UIImageView。如何将viewA快照到图像？我使用此代码，适用于任何类型的视图，但GLKView

- (UIImage *) takeSnapshot
{
    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, [[UIScreen mainScreen] scale]);
    [self.layer renderInContext:UIGraphicsGetCurrentContext()];

    UIImage * img = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return img;

}

Answer 1

它帮助我：

GLKView *glView = ...;
UIImage *img = [glView snapshot];

并将其绘制到您需要的上下文中，例如：

CGContextRef context = UIGraphicsGetCurrentContext();
CGPoint point = glView.frame.origin;
[img drawAtPoint:point blendMode:kCGBlendModeNormal alpha:1];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();