iOS Development Notes-iOS9.3 Uinavigationcontroller Add a workaround for Viewcontroller controls that are not displayed in storyboard

That's what I did, usually.

-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions {    Override point for customization after application launch.    Viewcontroller *FIRSTVC = [[Viewcontroller alloc] init];    Uinavigationcontroller *navicontroller = [[Uinavigationcontroller alloc] INITWITHROOTVIEWCONTROLLER:FIRSTVC];    Self.window.rootViewController = Navicontroller;    Self.window.backgroundColor = [Uicolor whitecolor];    [Self.window makekeyandvisible];    

However, after running, Uinavigationcontroller did appear as the root view of Windows, but the controls in the FIRSTVC were not displayed, a blank

It turns out that it is not possible to alloc the FIRSTVC directly, but to load it from the storyboard, I change it as follows:

-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions {    Override point for customization after application launch.    Uistoryboard *storyboard = [Uistoryboard storyboardwithname:@ "Main_" bundle:nil];    Viewcontroller *FIRSTVC = [StoryBoard instantiateviewcontrollerwithidentifier:@ "MainView"];    Uinavigationcontroller *navicontroller = [[Uinavigationcontroller alloc] INITWITHROOTVIEWCONTROLLER:FIRSTVC];    Self.window.rootViewController = Navicontroller;    Self.window.backgroundColor = [Uicolor whitecolor];    [Self.window makekeyandvisible];    return YES;}

I have seen a lot of code examples are like the former directly alloc loading can, but I do not here, it must be loaded from the storyboard, I did not notice where the big God told

iOS Development Notes-iOS9.3 Uinavigationcontroller Add a workaround for Viewcontroller controls that are not displayed in storyboard