swift 带视频的view截图

代码如下：

UIGraphicsBeginImageContextWithOptions(poolView.k_size, false, UIScreen.main.scale)
poolView.layer.render(in: UIGraphicsGetCurrentContext()!)
Aview.drawHierarchy(in: poolView.bounds, afterScreenUpdates: false)
let viewImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()

其中的poolview为要截图的view，Aview为poolview的父视图,OC转换下写法即可