Swift:在不使用StackView的情况下，通过带间距的迭代创建多个视图

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let numberOfViews = 5
        let spacing: CGFloat = 10
        let viewWidth: CGFloat = 50
        let viewHeight: CGFloat = 50
        
        for i in 0..<numberOfViews {
            let x = CGFloat(i) * (viewWidth + spacing)
            let view = UIView(frame: CGRect(x: x, y: 0, width: viewWidth, height: viewHeight))
            view.backgroundColor = UIColor.red
            self.view.addSubview(view)
        }
    }
}