title: how to change disabled item color in TabBar in swift 3?
body: <p>I have a TabBar in my project and when user select item this item will disable but the color will change too! I want the color is same as other items color in TabBar 
  I used </p>
  
  <pre><code>item.isEnabled = false
  </code></pre>
  
  <p>for disable item but this codes here won't work for this item </p>
  
  <pre><code> override func viewWillAppear(_ animated: Bool) {
      super.viewWillAppear(animated)
  
      self.tabBar.barTintColor = UIColor.init(red: 126/255, green: 0/255, blue: 64/255, alpha: 1.0)
      if #available(iOS 10.0, *) {
          self.tabBar.unselectedItemTintColor = UIColor.white
          self.tabBar.unselectedItemTintColor = UIColor.white
  
      } else {
          // Fallback on earlier versions
      }
      UITabBar.appearance().tintColor = UIColor.white
  
  }
  </code></pre>