Lost Background while building app for iOS

I am very new to app development. I just build an iOS app using Xcode and unity but unfortunately lost the blue background. Now the app by default have a white background. Can anyone help me to resolve this issue.

Hey. I am sorry that I cannot answer your question directly. Have you already checked whether the ViewController that has the background color is your initial viewcontroller? And how did you set your background color? In the storyboard or programatically?

Lost Background while building app for iOS
 
 
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