StackOverflow2013

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PO
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Id
18662423
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2013-09-06T16:30:01.770
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2013-09-06T16:30:01.770
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2017-05-23T12:13:29.433
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text
Body
<p>I'm pretty sure that you can't mask the corners this way. The cell's <code>backgroundView</code> is an image for a grouped <code>UITableView</code> so there's no sense of masking. </p> <p>A possible solution to the problem would be to round the corners yourself. This is a little tricky since you only want to round the top corners of the top cell and the bottom corners of the bottom cell. Fortunately, @lomanf posted a great solution to rounding arbitrary corners here: <a href="https://stackoverflow.com/questions/4847163/round-two-corners-in-uiview/4930166#4930166">Round two corners in UIView</a>. Using his <code>MTDContextCreateRoundedMask</code> method, we can achieve our goal.</p> <pre><code>- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { // Other cell instantiation // First cell in section if (indexPath.row == 0) { [self roundTopOrBottomCornersOfCell:cell top:YES]; } // Last cell in section else if (indexPath.row == tableView.numberOfRowsInSection:indexPath.section-1) { [self roundTopOrBottomCornersOfCell:cell top:NO]; } } // Modified from the second part of @lomanf's Solution 1 - (void)roundTopOrBottomCornersOfCell:(UITableViewCell*)cell top:(BOOL)top { // Set constant radius CGFloat radius = 5.0; // Create the mask image you need calling @lomanf's function UIImage* mask; if (top) { mask = MTDContextCreateRoundedMask(self.view.bounds, radius, radius, 0.0, 0.0); } else { mask = MTDContextCreateRoundedMask(self.view.bounds, 0.0, 0.0, radius, radius); } // Create a new layer that will work as a mask CALayer* layerMask = [CALayer layer]; layerMask.frame = cell.bounds; // Put the mask image as content of the layer layerMask.contents = (id)mask.CGImage; // Set the mask layer as mask of the view layer cell.layer.mask = layerMask; } </code></pre>
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1. This table or related slice is empty.
PostParentId
1. POclipsToBounds and masksToBounds in grouped UITableViewCell
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  PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USCommunity
UserOwnerUserId
1. USSam Toizer
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