At least part of my problem is I forgot to implement -tableView:heightForHeaderInSection:
On Jul 11, 2013, at 14:26 , Rick Mann <rm...@latencyzero.com> wrote: > I'm trying to reproduce the UITableView section header view used by iOS for > regular text headers. Based on Reveal.app, I see that it's a view sized 540 x > 34 that contains a UILabel (subclass) sized width x 21, positioned 40x5. > > I wanted to add a UIActivityIndicator just to the end of the text label, so I > built up the same hierarchy in IB: > > http://cl.ly/image/1L3q1b43471w > > But that alone wasn't enough; iOS stretches my view to the full width of the > table, and squashes it vertically to something very short. So I tried adding > a height constraint in code, because IB doesn't let me add a height > constraint to a top-level view: > > + (UITableViewSectionHeaderWithActivityIndicator*) > instance > { > static UINib* sNib; > static dispatch_once_t sInit; > dispatch_once(&sInit, > ^{ > sNib = [UINib nibWithNibName: > @"UITableViewSectionHeaderWithActivityIndicator" bundle: nil]; > }); > > NSArray* objs = [sNib instantiateWithOwner: nil options: nil]; > UITableViewSectionHeaderWithActivityIndicator* v = objs.lastObject; > > // IB won't let us add constraints to the top-level view… > > //v.translatesAutoresizingMaskIntoConstraints = false; > > NSDictionary* metrics = @{ @"height" : @(v.frame.size.height) }; > NSDictionary* views = @{ @"view" : v }; > NSArray* constraints = [NSLayoutConstraint constraintsWithVisualFormat: > @"V:[view(height)]" options: 0 metrics: metrics views: views]; > [v addConstraints: constraints]; > > return v; > } > > This fails with: > >> 2013-07-11 14:21:32.317 App[70432:c07] Unable to simultaneously satisfy >> constraints. >> Probably at least one of the constraints in the following list is one >> you don't want. Try this: (1) look at each constraint and try to figure out >> which you don't expect; (2) find the code that added the unwanted constraint >> or constraints and fix it. (Note: If you're seeing >> NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the >> documentation for the UIView property >> translatesAutoresizingMaskIntoConstraints) >> ( >> "<NSLayoutConstraint:0x9fb6570 >> V:[UITableViewSectionHeaderWithActivityIndicator:0x9fb6c80(34)]>", >> "<NSAutoresizingMaskLayoutConstraint:0x9fb50d0 h=--& v=--& >> V:[UITableViewSectionHeaderWithActivityIndicator:0x9fb6c80(10)]>" >> ) >> >> Will attempt to recover by breaking constraint >> <NSLayoutConstraint:0x9fb6570 >> V:[UITableViewSectionHeaderWithActivityIndicator:0x9fb6c80(34)]> > > So I tried setting translatesAutoresizingMaskIntoConstraints to false, but > that results in > >> 2013-07-11 14:24:53.688 App[70482:c07] *** Assertion failure in >> -[UITableView layoutSublayersOfLayer:], >> /SourceCache/UIKit_Sim/UIKit-2380.17/UIView.m:5776 >> 2013-07-11 14:24:57.127 App[70482:c07] *** Terminating app due to uncaught >> exception 'NSInternalInconsistencyException', reason: 'Auto Layout still >> required after executing -layoutSubviews. UITableView's implementation of >> -layoutSubviews needs to call super.' > > So I commented out that line and then added the bottom space constraint in IB > (between the label and the container view, to force the view's height). > > Any suggestions? > > Thanks, > -- > Rick > > > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/rmann%40latencyzero.com > > This email sent to rm...@latencyzero.com -- Rick _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
