iOS 13 如何删除SceneDelegate

 Xcode11之后新创建的工程会多出两个文件SceneDelegate。那么我们如何让它变回之前的那样的工程呢。

 

 

一、将这两个文件删除。
会报错There is no scene delegate set. A scene delegate class must be specified to use a main storyboard file.

 

 

 二、将Info.plist 中的 SceneMainSet 删除

 

三、将AppDelegate.m中的UISceneSession lifecycle注释掉或者删掉。

 

#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 *)application didDiscardSceneSessions:(NSSet<UISceneSession *> *)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.
//}

 

四、在didFinishLaunchingWithOptions中加入UIWindow。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
    
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    SKTabbarController * tabVC = [[SKTabbarController alloc] init];
    self.window.rootViewController = tabVC;
    
    return YES;
}

 

五 修改main函数

 

int main(int argc, char * argv[]) {
 
    @autoreleasepool {
    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
    }
    
}