连接约束删除边距

Question

当我以编程方式设置约束时，我将视图连接到另一个视图的一侧似乎正在丢失边距（我已经为视图设置了边距）：

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    self.helpView.isHidden = true
}

我知道我可以获得保证金然后应用它

bottomLineView.setVisibility(View.VISIBLE);
ConstraintSet mainConstraintSet = new ConstraintSet();
mainConstraintSet.clone(mainConstraintLayout);
mainConstraintSet.connect(bottomLineView.getId(), ConstraintSet.TOP, connectingViewId, ConstraintSet.BOTTOM, 0);
mainConstraintSet.applyTo(mainConstraintLayout);
termsAndConditionsTextView.setVisibility(View.VISIBLE);

但无论如何都要留下保证金吗？