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POAnimate `UITableView` headers when animating `tableHeaderView` in
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2013-03-15T12:42:01.347
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2017-05-23T12:21:05.887
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Body
For an answer for "<a href="https://stackoverflow.com/questions/341256/how-to-resize-a-tableheaderview-of-a-uitableview/15416193#15416193">How to resize a tableHeaderView of a UITableView?</a>" I created a small project on <a href="https://github.com/besi/ios-quickies/#resizetableheaderviewanimated" rel="nofollow noreferrer">github</a>, which adds a header view to a <code>UITableView</code> and animates both the newly added header view and the cells underneath it. However, as soon as I add header cells I get a nasty UI glitch because the headers don't animate along with the cells of the <code>UITableView</code>: When I add the header the following steps happen: <ol> <li>Problem: The topmost header jumps to the original position</li> <li>The <code>tableHeaderView</code> and the <code>UITableViewCell</code>s animate together to their final position.</li> </ol> So my question is, how I can make sure that the headers also animate. You can see the effect here, where the <code>Section-1</code> is at the final position, while the cells and the header view are still animating: <img src="https://i.stack.imgur.com/1Hzri.png" alt="header glitch"> This is the method, where I do the animation: <pre><code>- (void) showHeader:(BOOL)show animated:(BOOL)animated{ CGRect closedFrame = CGRectMake(0, 0, self.view.frame.size.width, 0); CGRect newFrame = show?self.initialFrame:closedFrame; if(animated){ // The UIView animation block handles the animation of our header view [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.3]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; // beginUpdates and endUpdates trigger the animation of our cells [self.tableView beginUpdates]; } self.headerView.frame = newFrame; [self.tableView setTableHeaderView:self.headerView]; if(animated){ [self.tableView endUpdates]; [UIView commitAnimations]; } } </code></pre>
Tags
<iphone><ios><uitableview><core-animation>
Title
Animate `UITableView` headers when animating `tableHeaderView` in
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