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I am trying to incorporate auto layout into my UITableViewHeaderFooterView subclass. The class is pretty basic, just two labels. This is the complete subclass: @implementation MBTableDetailStyleFooterView static void MBTableDetailStyleFooterViewCommonSetup(MBTableDetailStyleFooterView *_self) { UILabel *rightLabel = [[UILabel alloc] init]; _self.rightLabel = rightLabel; rightLabel.translatesAutoresizingMaskIntoConstraints = NO; [_self.contentView addSubview:rightLabel]; UILabel *leftLabel = [[UILabel alloc] init]; _self.leftLabel = leftLabel; leftLabel.translatesAutoresizingMaskIntoConstraints = NO; [_self.contentView addSubview:leftLabel]; NSDictionary *views = NSDictionaryOfVariableBindings(rightLabel, leftLabel); NSArray *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"|-10-[leftLabel]-(>=10)-[rightLabel]-10-|" options:0 metrics:nil views:views]; [_self.contentView addConstraints:horizontalConstraints]; // center views vertically in super view NSLayoutConstraint *leftCenterYConstraint = [NSLayoutConstraint constraintWithItem:leftLabel attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:_self.contentView attribute:NSLayoutAttributeCenterY multiplier:1 constant:0]; [_self.contentView addConstraint:leftCenterYConstraint]; NSLayoutConstraint *rightCenterYConstraint = [NSLayoutConstraint constraintWithItem:rightLabel attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:_self.contentView attribute:NSLayoutAttributeCenterY multiplier:1 constant:0]; [_self.contentView addConstraint:rightCenterYConstraint]; // same height for both labels NSLayoutConstraint *sameHeightConstraint = [NSLayoutConstraint constraintWithItem:leftLabel attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:rightLabel attribute:NSLayoutAttributeHeight multiplier:1 constant:0]; [_self.contentView addConstraint

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