iOS 26（iPadOS 26）适配指南（更新中...)不使用液态玻璃效果配置：在 info.plist 中加上 P

不使用液态玻璃效果配置：在 info.plist 中加上

<key>UIDesignRequiresCompatibility</key>
<true/>

P.S. 该配置项会在 iOS 下个主版本中移除

iPad 「Requires Full Screen」配置项 target -> general 中不再有 Requires Full Screen 勾选项，但在 infoPlist 中可以手动添加，不清楚下个大版本中是否会被强制禁用该配置

导航条按钮：按钮内容需居中对齐，在 iOS 26 上，按钮四周会被系统 UI 组件“圈住”，如果按钮内容不居中，UI 视觉效果会很丑。

Tabbar 通过 KVC 设置 “tabbar” 属性，自定义的 tabbar 的点击事件会被系统 tabbar 拦截，可以尝试直接将自定义 tabbar 添加在系统 tabbar 上面

UIScrollView 新增模糊边缘效果（UIScrollEdgeEffect 属性） topEdgeEffect、leftxxx、bottomxxx、rightxxx

UIApplicationDelegate 弃用函数

 /// Tells the delegate that the application has become active
 /// - Note: This method is not called if `UIScene` lifecycle has been adopted.

- (void)applicationDidBecomeActive:(UIApplication *)application API_DEPRECATED("Use UIScene lifecycle and sceneDidBecomeActive(_:) from UISceneDelegate or the UIApplication.didBecomeActiveNotification instead.", ios(2.0, 26.0), tvos(9.0, 26.0), visionos(1.0, 26.0)) API_UNAVAILABLE(watchos);

/// Tells the delegate that the application is about to become inactive
/// - Note: This method is not called if `UIScene` lifecycle has been adopted.

- (void)applicationWillResignActive:(UIApplication *)application API_DEPRECATED("Use UIScene lifecycle and sceneWillResignActive(_:) from UISceneDelegate or the UIApplication.willResignActiveNotification instead.", ios(2.0, 26.0), tvos(9.0, 26.0), visionos(1.0, 26.0)) API_UNAVAILABLE(watchos);

/// Tells the delegate that the application is now in the background
/// - Note: This method is not called if `UIScene` lifecycle has been adopted.

- (void)applicationDidEnterBackground:(UIApplication *)application API_AVAILABLE(ios(4.0)) API_DEPRECATED("Use UIScene lifecycle and sceneDidEnterBackground(_:) from UISceneDelegate or the UIApplication.didEnterBackgroundNotification instead.", ios(4.0, 26.0), tvos(9.0, 26.0), visionos(1.0, 26.0)) API_UNAVAILABLE(watchos);

/// Tells the delegate that the application is about to enter the foreground
/// - Note: This method is not called if `UIScene` lifecycle has been adopted.

- (void)applicationWillEnterForeground:(UIApplication *)application API_DEPRECATED("Use UIScene lifecycle and sceneWillEnterForeground(_:) from UISceneDelegate or the UIApplication.willEnterForegroundNotification instead.", ios(4.0, 26.0), tvos(9.0, 26.0), visionos(1.0, 26.0)) API_UNAVAILABLE(watchos);

/// Return NO if the application can't open the `url` for some reason

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey, id> *)options API_DEPRECATED("Use UIScene lifecycle and scene(_:openURLContexts:) from UISceneDelegate instead.", ios(9.0, 26.0), tvos(9.0, 26.0), visionos(1.0, 26.0)) API_UNAVAILABLE(watchos);

P.S. 实测，使用 Xcode 26 创建工程时，AppDelegate 类仍然默认创建，在不使用 SceneDelegate 时，以上函数仍可使用，但控制台会输出以下信息：

`UIScene` lifecycle will soon be required. Failure to adopt will result in an assert in the future.

看来，要来的迟早会来。

UIwindow 弃用函数

 - (instancetype)initWithFrame:(CGRect)frame NS_DESIGNATED_INITIALIZER API_DEPRECATED("Use init(windowScene:) instead.", ios(2.0, 26.0), tvos(9.0, 26.0), visionos(1.0, 26.0)) API_UNAVAILABLE(watchos);
 - (instancetype)init API_DEPRECATED("Use init(windowScene:) instead.", ios(2.0, 26.0), tvos(9.0, 26.0), visionos(1.0, 26.0)) API_UNAVAILABLE(watchos);

iPadOS 26 如果不勾选所有的旋转方向，是不能将 App 的 window 拖拽至任意 size的。
iPadOS 26 中如果设置 UIView 的 insetsLayoutMarginsFromSafeArea、insetsContentViewsToSafeArea 为 NO 时，App window 中右侧详情页面会被左侧主控制器页面遮挡（iPadOS 26 中视图层物理层级逻辑有所变化，左右不在是同级，改为左侧悬浮在内容视图上层，比如 Tabbar 也是如此），而默认的 YES 状态下，右侧详情页面的布局是从安全区布局的，所以不会出现遮挡问题。Apple 最佳实践：不要将这两个属性设为 NO！
iPadOS 26 ，控制器的 view 如果添加自控制的 view，需遵循最佳实践，即 addSubview: 、addChildViewController: 、didMoveToParentViewController: 这三个函数，一个都不能少，否则也会出现右侧详情页被主控制器页面遮挡的问题

iOS 26（iPadOS 26） 适配指南（更新中...)

iOS 26（iPadOS 26）适配指南（更新中...)