如何使用autoLayout以编程方式将UIScrollView设置为水平滚动

let scrollView = UIScrollView()
view.addSubview(scrollView)

scrollView.translatesAutoresizingMaskIntoConstraints = false

let contentView = UIView()
scrollView.addSubview(contentView)

contentView.translatesAutoresizingMaskIntoConstraints = false
contentView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor).isActive = true
contentView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor).isActive = true
contentView.topAnchor.constraint(equalTo: scrollView.topAnchor).isActive = true
contentView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor).isActive = true
contentView.heightAnchor.constraint(equalTo: scrollView.heightAnchor).isActive = true

let subview1 = UIView()
contentView.addSubview(subview1)

let subview2 = UIView()
contentView.addSubview(subview2)

// 添加更多子视图...

subview1.translatesAutoresizingMaskIntoConstraints = false
subview2.translatesAutoresizingMaskIntoConstraints = false

subview1.leadingAnchor.constraint(equalTo: contentView.leadingAnchor).isActive = true
subview1.topAnchor.constraint(equalTo: contentView.topAnchor).isActive = true
subview1.bottomAnchor.constraint(equalTo: contentView.bottomAnchor).isActive = true
subview1.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true

subview2.leadingAnchor.constraint(equalTo: subview1.trailingAnchor).isActive = true
subview2.topAnchor.constraint(equalTo: contentView.topAnchor).isActive = true
subview2.bottomAnchor.constraint(equalTo: contentView.bottomAnchor).isActive = true
subview2.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true

// 添加更多子视图的约束...