gistfile1.m

- (void) updateConstraints {
    NSMutableDictionary* views = [NSMutableDictionary new];
    [views setObject: textView forKey: @"textView"];
    [views setObject: resultTableView forKey: @"resultTableView"];

    [self removeConstraints: [self constraints]];
    [self addConstraints: [NSLayoutConstraint constraintsWithVisualFormat:
        @"H:|-15-[textView(>=100)]-15-|"
        options: 0
        metrics: nil
        views: views]];
    if ([resultTableView isHidden]) {
        [self addConstraints: [NSLayoutConstraint constraintsWithVisualFormat:
            @"V:|-15-[textView(>=20)]-15-|"
            options: 0
            metrics: nil
            views: views]];
    } else {
        [self addConstraints: [NSLayoutConstraint constraintsWithVisualFormat:
            @"H:|-15-[resultTableView(>=100)]-15-|"
            options: 0
            metrics: nil
            views: views]];
        [self addConstraints: [NSLayoutConstraint constraintsWithVisualFormat:
            @"V:|-15-[textView(>=20)]-10-[resultTableView]-15-|"
            options: 0
            metrics: nil
            views: views]];
    }

    [super updateConstraints];
}