Xcode11前后自定义窗口

Xcode11前

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(励志名言英语NSDictionary *)launchOptions {     //Xcode11前生效    lf.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    lf.window.backgroundColor = [UIColor whiteColor];    UIViewController *vC = [[CustomViewController alloc] init];    lf.window.rootViewController = vC;    //window核心化可见    [lf.window makeKeyAndVisible];    return YES;}

Xcode11后

- (形容声音很大的四字词语void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)ssion options:(UISceneConnectionOptions *)connectionOptions  API_AVAILABLE(ios(13.0)) API_AVAILABLE(ios(13.0)) API_AVAILABLE(ios(13.0)){     //Xcode11后生效    //scene行参字段名表象特征结构为UIScene*但持有的实例值的实际特征结构为UIWindowScene*    //强制类型转化    if (@avail海底世界资料able(iOS 13.0, *)) {         UIWindowScene *windowScene = (UIWindowScene *)scene;        lf.window = [[小说创作UIWindow alloc] initWithWindowScene:windowScene];    } el {         lf.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    }    lf.window.backgroundColor = [UIColor whiteC学英语零基础olor];    UIViewController *vC = [[CustomViewController alloc] init];    lf.window.rootViewController = vC;    //window核心化可见    [lf.window makeKeyAndVisible];}

本文地址：https://blog.csdn.net/yanhaijunyan/article/details/111938211