如何在Sprite-Kit中编程截图？

Question

我一直在阅读关于如何以编程方式截取屏幕截图的解决问题，但我似乎无法在sprite kit中获得我所读到的内容。例如：

此问题How to take a screenshot programmatically

   UIGraphicsBeginImageContext(self.window.bounds.size);
    [self.window.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    NSData * data = UIImagePNGRepresentation(image);
    [data writeToFile:@"foo.png" atomically:YES];

更新2011年4月:对于视网膜显示，将第一行更改为：

if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
    UIGraphicsBeginImageContextWithOptions(self.window.bounds.size, NO, [UIScreen mainScreen].scale);
else
    UIGraphicsBeginImageContext(self.window.bounds.size);

我给了我这个信息，我在我的游戏上测试了它，但它不能工作，因为window在SKScene上无法识别。我试着用scene来代替它，但这不起作用。有什么建议吗？

我还尝试了这个：

UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, scale);
[self drawViewHierarchyInRect:self.bounds afterScreenUpdates:YES];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

我在这个问题中找到了：ios Sprite Kit screengrab?

但它似乎也不起作用，因为它不识别规模，或第二行的界限。

Answer 1

这是在-Kit中截屏的最佳解决方案

UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, 1);
[self.view drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:YES];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return  viewImage;

Answer 2

func screenShot() {

    UIGraphicsBeginImageContextWithOptions(UIScreen.mainScreen().bounds.size, false, 0)
    self.view!.drawViewHierarchyInRect(self.view!.bounds, afterScreenUpdates: true)
    var image:UIImage = UIGraphicsGetImageFromCurrentImageContext()

    UIGraphicsEndImageContext()

    var Image = image //The image is stored in the variable Image

}

screenshot() //Calls the function and takes a screenshot

Answer 3

// Full Screen Shot function. Hope this will work well in spritekit.   
func screenShot() -> UIImage {                                                    
 UIGraphicsBeginImageContext(CGSizeMake(frame.size.width, frame.size.height))
 var context:CGContextRef  = UIGraphicsGetCurrentContext()
 self.view?.drawViewHierarchyInRect(frame, afterScreenUpdates: true)
 var screenShot = UIGraphicsGetImageFromCurrentImageContext()
 UIGraphicsEndImageContext();  
 return screenShot 
}