iOS 13 ScrollView截图问题记录

- (UIImage*)captureScrollView:(UIScrollView*)scrollView{

之前有过scrollView 截取长图的需求从网上搜索的是以下代码 
    UIImage* image = nil;

    UIGraphicsBeginImageContext(scrollView.contentSize);

    {

        CGPoint savedContentOffset = scrollView.contentOffset;

        CGRect savedFrame = scrollView.frame;

        UIGraphicsBeginImageContextWithOptions(scrollView.frame.size,NO, [UIScreen mainScreen].scale);

        scrollView.contentOffset=CGPointZero;

        scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);

        [scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];

        image = UIGraphicsGetImageFromCurrentImageContext();

        scrollView.contentOffset = savedContentOffset;

        scrollView.frame = savedFrame;

    }

    UIGraphicsEndImageContext();

    if(image !=nil) {

        returnimage;

    }

}

但是最近iOS13测试后的时候发现长图显示不全，经过查询以下代码可解决

- (UIImage*)captureScrollView:(UIScrollView*)scrollView{

UIImage* viewImage = nil;

    UITableView *scrollView = tableview;

    UIGraphicsBeginImageContextWithOptions(scrollView.contentSize, NO, 0.0);

    {

// 保存原来的偏移量        CGPoint savedContentOffset = scrollView.contentOffset;

        // CGPoint savedFrame = scrollView.frame; // 设置截图需要的偏移量和frame        scrollView.contentOffset = CGPointZero;

        scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);

// 创建临时view，并且把要截图的view添加到临时view上面        UIView *tempView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height)];

        [scrollView removeFromSuperview];

        [tempView addSubview:scrollView];

// 对临时view进行截图        [tempView.layer renderInContext:UIGraphicsGetCurrentContext()];

        viewImage = UIGraphicsGetImageFromCurrentImageContext();

// 恢复截图view原来的状态        [scrollView removeFromSuperview];

        [self addSubview:scrollView];

        scrollView.contentOffset = savedContentOffset;

// 如果原来是frame布局，需要设置frame，如果是Auto layout需要再次进行Auto layout布局。 // scrollView.frame = savedFrame;        [scrollView mas_makeConstraints:^(MASConstraintMaker *make) {

            make.edges.equalTo(self);

        }];

    }

    UIGraphicsEndImageContext();

return viewImage;

}

    return viewImage;