crazy that hiding a uiview doesn't affect its autolayout constraints. here's a category for the rest of the world who uses dynamic interfaces

UIView+TLLayout.h

#import <UIKit/UIKit.h>

@interface UIView (TLLayout)

@property (nonatomic, strong) NSArray *hiddenConstraints;

// set hidden and remove any constraints involving this view from its superview
- (void)hideAndRemoveConstraints;
- (void)showAndRestoreConstraints;

@end

UIView+TLLayout.m

#import <objc/runtime.h>

#import "UIView+TLLayout.h"

MAKE_CATEGORIES_LOADABLE(UIView_TLLayout)

static char kTLHiddenConstraintsKey;

@implementation UIView (TLLayout)

@dynamic hiddenConstraints;

- (NSArray *)hiddenConstraints {
    return objc_getAssociatedObject(self, &kTLHiddenConstraintsKey);
}

- (void)setHiddenConstraints:(NSArray *)constraints {
    objc_setAssociatedObject(self, &kTLHiddenConstraintsKey, constraints, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (void)hideAndRemoveConstraints
{
    self.hidden = YES;
    if (!self.hiddenConstraints) {
        self.hiddenConstraints = [self.superview.constraints objectsPassingTest:^BOOL(NSLayoutConstraint *constraint, NSUInteger idx, BOOL *stop) {
            return constraint.firstItem == self || constraint.secondItem == self;
        }];
        [self.superview removeConstraints:self.hiddenConstraints];
    }
}

- (void)showAndRestoreConstraints
{
    if (self.hiddenConstraints) {
        [self.superview addConstraints:self.hiddenConstraints];
        self.hiddenConstraints = nil;
    }
    self.hidden = NO;
}

@end