iOS object-c和Swift移除SceneDelegat

OC环境下：

1.先直接删除SceneDelegate.h/.m文件

2.在AppDelegate.h添加@property (strong, nonatomic) UIWindow * window;属性

#import

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow * window;

@end

3.移除UIScene代理

移除之前

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions {

    // Override point for customization after application launch.

    return YES;

}

#pragma mark - UISceneSession lifecycle

- (UISceneConfiguration *)application:(UIApplication *)application configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession options:(UISceneConnectionOptions *)options {

    // Called when a new scene session is being created.

    // Use this method to select a configuration to create the new scene with.

    return [[UISceneConfiguration alloc] initWithName:@"Default Configuration" sessionRole:connectingSceneSession.role];

}

- (void)application:(UIApplication*)applicationdidDiscardSceneSessions:(NSSet *)sceneSessions {

    // Called when the user discards a scene session.

    // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.

    // Use this method to release any resources that were specific to the discarded scenes, as they will not return.

}

@end

移除之后

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions {

    // Override point for customization after application launch.

    return YES;

}

@end

4.最后在info.plist文件中移除Application Scene Manifest

Swift环境下也是一样的：

1.先直接删除SceneDelegate.swift文件

2.在info.plist文件中删除Application scene manifest

3.删除AppDelegate中的两个方法

4.在Appdelegate中增加window属性

知识补充：SceneDelegate

Xcode 11 建新工程默认会创建通过 UIScene 管理多个 UIWindow 的应用，工程中除了 AppDelegate 外还会有一个 SceneDelegate，这是为了实现iPadOS支持多窗口的结果。如果仅开发iPhone应用而非iPad，那么该文件可放心地删除。