SceneDelegate：[AppDelegate setWindow:]: unrecognized selector sent to instance 0x60000002b440

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SceneDelegate
在Xcode11.0以后创建项目，运行项目出现bug时遇到的问题之一，我的解决方法。
报错：

-[AppDelegate setWindow:]: unrecognized selector sent to instance 0x60000002b440

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修改方法：
在AppDelegate.h里加声明window

@property (nonatomic, strong) UIWindow * window;

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运行问题解决

兼容13和13以前的项目AppDelegate和SceneDelegate类方法里设置
在AppDelegate.m设置

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    if (@available(iOS 13.0, *)) {
  
    } else {
      
        self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
        self.window.rootViewController = [[UITabBarController alloc]init];
        self.window.backgroundColor = [UIColor whiteColor];
        [self.window makeKeyAndVisible];
        
    }
    return YES;
}

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在SceneDelegate.m里设置

    UIWindowScene *windowScene = (UIWindowScene *)scene;
         self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
          self.window = [[UIWindow alloc] initWithWindowScene:windowScene];
          [self.window setWindowScene:windowScene];
          [self.window setBackgroundColor:[UIColor whiteColor]];
          [self.window setRootViewController:[UITabBarController new]];
          
          [self.window makeKeyAndVisible];
         

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运行就OK了

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