gistfile1.m

        self.label = [[UILabel alloc] init];
        self.segmentedControl = [[UISegmentedControl alloc] init];
        
        [self.contentView addSubview:_segmentedControl];
        [self.contentView addSubview:_label];
        
        NSDictionary* viewsDictionary = @{@"segmentedControl" : _segmentedControl, @"label" : _label};
        
        [self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[label(>=100)]-[segmentedControl(>=100)]-|"
                                                                                 options:NSLayoutFormatAlignAllTop
                                                                                 metrics:nil
                                                                                   views:viewsDictionary]];