UIDocumentViewController

新增视图控制器，用于显示与管理本地或者云端文档。

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        let documentViewController = UIDocumentViewController()
        documentViewController.openDocument { _ in
            print("打开文档")
        }
        present(documentViewController, animated: true)
    }
}

UIHoverStyle

UIView 增加了一个hoverStyle属性，可以设置鼠标移动到 UIView 之上的效果。

import UIKit

class ViewController: UIViewController {
    lazy var redView: UIView = {
        let view = UIView(frame: CGRect(x: 200, y: 200, width: 200, height: 200))
        view.backgroundColor = .red
        // iOS17新增UIHoverStyle，可以设置Hover的效果与形状（UIShape）
        let hoverStyle = UIHoverStyle(effect: .lift, shape: .capsule)
        // iOS17新增，鼠标移动到UIView之上的效果
        view.hoverStyle = hoverStyle
        return view
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        view.addSubview(redView)
    }
}

UIScrollView

增加了属性allowsKeyboardScrolling表示是否根据连接的物理键盘的方向键而滚动。

import UIKit

class ViewController: UIViewController {
    lazy var scrollView: UIScrollView = {
        let scrollView = UIScrollView(frame: CGRect(x: 0,
                                                    y: 0,
                                                    width: UIScreen.main.bounds.width,
                                                    height: UIScreen.main.bounds.width))
        let imageView = UIImageView(image: UIImage(named: "img"))
        scrollView.addSubview(imageView)
        scrollView.contentSize = imageView.bounds.size
        // iOS17新增，默认为true
        scrollView.isScrollEnabled = false
        return scrollView
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        view.addSubview(scrollView)
    }
}

applicationIconBadgeNumber

UIApplication 的applicationIconBadgeNumber属性被废弃，建议使用UNUserNotificationCenter.current().setBadgeCount()方法。

import UIKit
import UserNotifications

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        // iOS17之后设置角标，需要先授权
        // UNUserNotificationCenter.current().setBadgeCount(10)
        UNUserNotificationCenter.current().setBadgeCount(10) { error in
            if let error {
                print(error)
            }
        }
    }
}