xcode6.0+ Create an empty application step:

1. Select Template Single View application

2. Delete Main.storyboard and Launchscreen.xib

3, in Info.plist, the Launch screen interface file base name and main storyboard file base name Delete

4. Click on the use Asset Catalog in target and click Migrate directly in the dialog box.

5, add the code in the first method of Appdelegate:

Oc:

(1), create window

Self.window = [[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]];

(2), set window background

Self.window.backgroundColor = [Uicolor Whitecolor];

(3), make window visible

[Self.window makekeyandvisible];

Swift

Self.window = UIWindow (Frame:UIScreen.mainScreen (). bounds);

self.window!. BackgroundColor = Uicolor.whitecolor ();

self.window!. Makekeyandvisible ();

xcode6.0+ Create an empty application step: