xcode删除main.Storyboard 保持工程干净 需要注意事项

1.删除info.plist文件中 Main storyboard file base name项
该项用于引导程序打开Main的 storyboard 文件

2.在appdelegate中，

application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 函数创建window，即

self.window = [[UIWindow
alloc] initWithFrame:[[UIScreen
mainScreen] bounds]];
3.在appdelegate中，
application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 函数中，显示window

[self.window
makeKeyAndVisible]; //显示窗口

eg:

self.window = [[UIWindow
alloc] initWithFrame:[[UIScreen
mainScreen] bounds]];

MViewController * vc = [[MViewController
alloc] init];
NaviViewController * nc = [[NaviViewController
alloc] initWithRootViewController:vc];
self.window.rootViewController = nc;
[self.window
makeKeyAndVisible]; //显示窗口