Xcode11.0更新以后，新建项目工程遇到的黑屏现象及解决办法

啰嗦几句:上周吧，咱们Xcode更新到了11.0，有的人可能尚未发现，新建的项目中多了一个场景代理类目#import "SceneDelegate.h"，至于怎么用的，我目前尚未定论。大家能够尝试一下，新建一个项目工程，在ViewController里面写一个按钮buton渲染界面，用真机调试一下，再用模拟器调试一下，手机调试会出现黑屏，模拟器呢，会出现button按钮，如今公司项目都是以前写好的，可能不会存在这样问题。下面就一一看下问题

第1、首先要保证你的xcode是最新的

Xcode11.0 2019-09-27 20.18.27.png

Xcode更新以后，少了不少的模拟器，固然这是能够自行添加的，并没有大碍

屏幕快照 2019-09-27 20.21.37.png

项目建立完以后，项目中多了一个场景代理类目，至于怎么用的，鉴于刚发现，还再研究中

屏幕快照 2019-09-27 20.14.16.png

今天下午我新建一个工程想写一个波浪效果，发现了以上问题及如下问题，我把运行的截图发一下

本身的手机上调试的结果 2019-09-27 20.25.21.png

这是模拟器运行的效果，模拟器是没问题的

模拟器上运行的 2019-09-27 20.26.15.png

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1、解决办法一(以失败了结)在AppDelegate引入

#import "AppDelegate.h"
#import "ViewController.h"
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
//   测试写一下 没有效果 我写的两个波浪没有了
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
    
    ViewController *home = [[ViewController alloc] init];
    _navController = [[UINavigationController alloc] initWithRootViewController:home];
     [_navController.navigationBar setBackgroundColor:[UIColor blueColor]];
     [self.window setRootViewController:_navController];
//    self.window.rootViewController = home;
    [self.window makeKeyAndVisible];
    
//    添加这个运行以后会报错
    
    return YES;
}

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这个方法第一件想到要加上的，但是不行，解决办法是不行的毕竟刚出啦，有没有相关的说明及解释，若是有哪位iOS大神知道的，能否指点小弟一二，不胜感激
2、遇到的场景代理类目#import "SceneDelegate.h"

#import <UIKit/UIKit.h>

@interface SceneDelegate : UIResponder <UIWindowSceneDelegate>

@property (strong, nonatomic) UIWindow * window;

@end
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#import "SceneDelegate.h"

@interface SceneDelegate ()

@end

@implementation SceneDelegate


- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
    // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
//    使用此方法可选地配置并将UIWindow ' window '附加到提供的UIWindowScene ' scene '。
    // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
    // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
//    这个委托并不意味着链接的场景或会话是新的(请参见“application:configurationForConnectingSceneSession”)。
}


- (void)sceneDidDisconnect:(UIScene *)scene {
    // Called as the scene is being released by the system.
//    当场景被系统释放时调用。
    // This occurs shortly after the scene enters the background, or when its session is discarded.
//    这发生在场景进入后台后不久，或者当它的会话被丢弃时。
    // Release any resources associated with this scene that can be re-created the next time the scene connects.
//    释放与此场景关联的任何资源，这些资源能够在下一次场景链接时从新建立。
    // The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
//    场景稍后可能从新链接，由于它的会话没有必要被丢弃(请参见“application: diddiscardscenes”)。
}


- (void)sceneDidBecomeActive:(UIScene *)scene {
    // Called when the scene has moved from an inactive state to an active state.
    // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}


- (void)sceneWillResignActive:(UIScene *)scene {
    // Called when the scene will move from an active state to an inactive state.
    // This may occur due to temporary interruptions (ex. an incoming phone call).
}


- (void)sceneWillEnterForeground:(UIScene *)scene {
    // Called as the scene transitions from the background to the foreground.
    // Use this method to undo the changes made on entering the background.
}


- (void)sceneDidEnterBackground:(UIScene *)scene {
    // Called as the scene transitions from the foreground to the background.
    // Use this method to save data, release shared resources, and store enough scene-specific state information
    // to restore the scene back to its current state.
}


@end

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有道翻译了下，仍是不会用，脑壳有瑕疵啊，哎，有大佬会用的能够评论里指点一二，拜谢！！！！！

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