如何在自定义分段控制器中居中显示文本？斯威夫特

import UIKit

class CustomSegmentedControl: UIControl {
    
    private var labels = [UILabel]()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupSegmentedControl()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setupSegmentedControl()
    }
    
    private func setupSegmentedControl() {
        // 添加分段的文本
        let segmentTitles = ["Segment 1", "Segment 2", "Segment 3"]
        
        for title in segmentTitles {
            let label = UILabel()
            label.text = title
            label.textAlignment = .center
            labels.append(label)
            addSubview(label)
        }
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let segmentWidth = bounds.width / CGFloat(labels.count)
        let segmentHeight = bounds.height
        
        for (index, label) in labels.enumerated() {
            let segmentFrame = CGRect(x: CGFloat(index) * segmentWidth, y: 0, width: segmentWidth, height: segmentHeight)
            label.frame = segmentFrame
        }
    }
}