将整个UITableView渲染为图像！分享

import UIKit

extension UITableView {
    func renderAsImage() -> UIImage? {
        UIGraphicsBeginImageContextWithOptions(contentSize, false, 0.0)
        
        if let context = UIGraphicsGetCurrentContext() {
            let rect = CGRect(origin: .zero, size: contentSize)
            
            context.saveGState()
            context.translateBy(x: -contentOffset.x, y: -contentOffset.y)
            
            layer.render(in: context)
            
            context.restoreGState()
            
            let renderedImage = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext()
            
            return renderedImage
        }
        
        return nil
    }
}