如何水平对齐两个UILabel (固定宽度和可变宽度)

// 创建固定宽度的UILabel
let fixedWidthLabel = UILabel()
fixedWidthLabel.text = "固定宽度"
fixedWidthLabel.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(fixedWidthLabel)

// 创建可变宽度的UILabel
let variableWidthLabel = UILabel()
variableWidthLabel.text = "可变宽度"
variableWidthLabel.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(variableWidthLabel)

// 设置固定宽度的UILabel的约束
fixedWidthLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20).isActive = true
fixedWidthLabel.widthAnchor.constraint(equalToConstant: 100).isActive = true
fixedWidthLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true

// 设置可变宽度的UILabel的约束
variableWidthLabel.leadingAnchor.constraint(equalTo: fixedWidthLabel.trailingAnchor, constant: 20).isActive = true
variableWidthLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20).isActive = true
variableWidthLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
variableWidthLabel.setContentHuggingPriority(.defaultLow, for: .horizontal)