Let’s get started & know what is the exact requirement before we proceed for solution.
Assumption: I assume that you want to have Status Bar text colour to be white as your Navigation Bar background is in dark colour. I also assume that you are developing your iOS app with latest version of iOS 9 or higher & latest version Swift & Xcode
Step 01: Click on your Project icon in your ‘Project Navigator’ tab in your respective projects left panel ‘Navigator’ tab.
Step 02: Select your project title under ‘Targets’
Step 03: Select ‘Info’ tab