在iOS 11中使用增加的导航栏标题

import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置导航栏的大标题样式
        navigationController?.navigationBar.prefersLargeTitles = true
        
        // 创建一个标签作为大标题
        let titleLabel = UILabel()
        titleLabel.text = "我的大标题"
        titleLabel.font = UIFont.boldSystemFont(ofSize: 34)
        titleLabel.textColor = .black
        navigationItem.titleView = titleLabel
        
        // 设置滚动视图
        let scrollView = UIScrollView()
        scrollView.frame = view.bounds
        view.addSubview(scrollView)
        
        // 添加一些内容到滚动视图
        let contentView = UIView()
        contentView.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: 2000)
        scrollView.contentSize = contentView.bounds.size
        scrollView.addSubview(contentView)
        
        // 添加一些子视图到内容视图
        for i in 0..<10 {
            let label = UILabel()
            label.frame = CGRect(x: 20, y: CGFloat(i * 100 + 20), width: 200, height: 40)
            label.text = "这是第 \(i) 行内容"
            contentView.addSubview(label)
        }
    }
}