self.contentView.translatesAutoresizingMaskIntoConstraints = NO;
    _someView = [[UIView alloc] initWithFrame:CGRectZero];
    _someView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.contentView addSubview:_someView];
    NSArray *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-2-[someView]-2-|" options:0 metrics:nil views:@{@"someView" : _someView}];
    NSArray *verticalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-2-[someView]-2-|" options:0 metrics:nil views:@{@"someView" : _someView}];

    [self.contentView addConstraints:horizontalConstraints];
    [self.contentView addConstraints:verticalConstraints];