UITableView 在iOS13.0之后截图不完全处理方法

    UIImage *image = nil;
    // 下面方法，第一个参数表示区域大小。第二个参数表示是否是非透明的。如果需要显示半透明效果，需要传NO，否则传YES。第三个参数就是屏幕密度了，调整清晰度。
    UIGraphicsBeginImageContextWithOptions(table.contentSize, YES, [UIScreen mainScreen].scale);
    //3、tableView内容
    CGPoint savedContentOffset = table.contentOffset;
    CGRect savedFrame = table.frame;
    CGSize contentSize = table.contentSize;
    CGRect oldBounds = table.layer.bounds;
    if (@available(iOS 13.0, *)) {
        [table.layer setBounds:CGRectMake(oldBounds.origin.x, oldBounds.origin.y,
                                          contentSize.width, contentSize.height)];
    }
    CGFloat transY = 0;//navFrame.size.height;
    CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, transY);
//    [colorLayer renderInContext:UIGraphicsGetCurrentContext()];
    table.contentOffset = CGPointZero;
    table.frame = CGRectMake(0, 0, contentSize.width, contentSize.height);
    [table.layer renderInContext:UIGraphicsGetCurrentContext()];
    CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, -transY);
    if (@available(iOS 13.0, *)) {
        [table.layer setBounds:oldBounds];
    }
    //4、生成图片
    image = UIGraphicsGetImageFromCurrentImageContext();

    //5、恢复tableView的显示
    table.contentOffset = savedContentOffset;
    table.frame = savedFrame;
    //6、结束绘制
    UIGraphicsEndImageContext();