UIView *statsView = [[UIView alloc] initWithFrame:CGRectMake(10, 130, 200, 12)];

for (UIButton* v in [statsView subviews]) {
        v.translatesAutoresizingMaskIntoConstraints = NO;
       [statsView addSubview:v];
    }
    NSDictionary *views = @{@"reposts": v1,
                            @"likes": v2,
                            @"comments": v3
                            };
    [statsView addConstraints:[NSLayoutConstraint
                               constraintsWithVisualFormat:@"H:|[reposts][likes][comments]"
                               options:NSLayoutFormatAlignAllTop| NSLayoutFormatAlignAllBottom
                               metrics:0
                               views:views]];