How to render a whole UITableView as an UIImage in iOS?

Question

I have simple UITableView with some data. The table\'s height is greater than the screen size. Now I need to catch screenshot of this table (a whole table). I k

Answer 1

add render method to UITableView through category

- (UIImage *)render {

    //save the origin infos for later to restore
    CGPoint originContentOffset = self.contentOffset;

    //force jump to table view's top
    self.contentOffset = CGPointZero;

    UIGraphicsBeginImageContext(self.contentSize);

    CGContextRef *ctx = UIGraphicsGetCurrentContext();

    //render header 
    [self.tableHeaderView.layer renderInContext:ctx];

    //render sections
    NSInteger numberOfSections = [self numberOfSections];
    for (int section = 0; section < numberOfSections; section++) {
        NSInteger numberOfRows = [self numberOfRowsInSection:section];
        for (int row = 0; row < numberOfRows; row++) {
            NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:section];
            //check cell is visible
            if ([self cellForRowAtIndexPath:indexPath]) {
                [self scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:false];
                [self.layer renderInContext:ctx];
            }
        }
    }

    //render footer
    [self.tableFooterView.layer renderInContext:ctx];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    //restore infos
    self.contentOffset = originContentOffset;

    return image;
}