Masonry

[label1 setContentHuggingPriority:UILayoutPriorityRequired
                          forAxis:UILayoutConstraintAxisHorizontal];
[label2 setContentHuggingPriority:UILayoutPriorityDefaultLow
                          forAxis:UILayoutConstraintAxisHorizontal];

[label1 setContentCompressionResistancePriority:UILayoutPriorityDefaultLow
                                        forAxis:UILayoutConstraintAxisVertical];
[label2 setContentCompressionResistancePriority:UILayoutPriorityRequired
                                        forAxis:UILayoutConstraintAxisVertical];