自动布局未以编程方式更新视图-Swift

我有下面的代码,我在其中创建和布局所有的代码。我要做的是修改 myTopContainer

知道为什么吗?

func setupAutoLayout(){
    NSLayoutConstraint.activate([
        // My Container
        myTopContainer.bottomAnchor.constraint(equalTo: myButton.topAnchor, constant: -5),
        myTopContainer.heightAnchor.constraint(equalToConstant: 50),
        myTopContainer.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 15),
        myTopContainer.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -15),

        // My Button
        myButton.widthAnchor.constraint(equalToConstant: 80),
        myButton.heightAnchor.constraint(equalToConstant: 40),
        myButton.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -15),
        myButton.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: -400)
    ])
}


@IBAction func relayoutViews(_ sender: Any) {

    UIView.animate(withDuration: 0.5, delay: 0, options: .curveEaseIn, animations: {

        self.myTopContainer.heightAnchor.constraint(equalToConstant: 50).isActive = false
        self.myTopContainer.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 15).isActive = false

        // this is working, it changes the height
        self.myTopContainer.heightAnchor.constraint(equalToConstant: 10).isActive = true
        // this is not doing anything
        self.myTopContainer.leadingAnchor.constraint(equalTo: self.myButton.trailingAnchor).isActive = true

        self.view.layoutIfNeeded()

    })
}