Customizing the Background Color of the UINavigationBar in iOS to Appear as a Solid Color Instead of a Gradient.

How to Customize NavigationBar Title Color in iOS: A Step-by-Step Guide

Understanding Navigation Bars in iOS7

Customizing the iOS Navigation Bar for a More Elegant User Experience

iOS 7 UINavigationBar Stops Extending Under Status Bar After a While: A Developer's Guide to Resolving the Issue

Sizing a UITextField to Fit Within the Width of a UINavigationBar in iOS Development