The first page after iOS configuration starts

Configure Viewcontroller.swift as the first page after startup in Appdelegate.swift

Import Uikit@uiapplicationmainclass Appdelegate:uiresponder, uiapplicationdelegate {    var window:uiwindow?    Func application (application:uiapplication, didfinishlaunchingwithoptions launchoptions: [Nsobject:anyobject]?)- > Bool {        //start with the first page        Self.window = UIWindow (Frame:UIScreen.mainScreen (). bounds);                Here set Rootviewcontroller for Viewcontroller instance let        VC = Viewcontroller ();        Self.window?. Rootviewcontroller = vc;//The bank VC to fill out the page you want to select                Self.window? BackgroundColor =. Whitecolor ();        Self.window?. Makekeyandvisible ();        return true;    }

Write the background color briefly in the Viewcontroller.swift

Import Uikitclass Viewcontroller:uiviewcontroller {    override func Viewdidload () {        super.viewdidload ()        // Additional setup after loading the view, typically from a nib.        Self.view.backgroundColor =. Yellowcolor ();//Background color settings    }    override Func didreceivememorywarning () {        Super.didreceivememorywarning ()        //Dispose of any resources, can be recreated.    }}

Select the appropriate "TARGETS", select "General", find the following two configuration items, and clear the contents.

Delete the Main.storyboard and Launchscreen.storyboard files.

Then the yellow page appears on the run

The first page after iOS configuration starts