The NavigationBar time is now the current time in the specified location.

1Weather/Resources/en.lproj/Localizable.strings

@@ -94,6 +94,9 @@
 "tabBar.radar" = "radar";
 "tabBar.menu" = "menu";
 
+//Navigation bar
+"navigationBar.noCityAvailable" = "N/A";
+
 // Search
 "search.add" = "add";
 "search.popularCities" = "Popular cities";

1Weather/UI/Buttons/NavigationCityButton.swift

@@ -15,10 +15,22 @@ class NavigationCityButton: UIControl {
     private let downArrowImageView = UIImageView()
     private let timeLabel = UILabel()
     private let kSpaceForDownArrow:CGFloat = 10
-    private static let timeFormatter:DateFormatter = {
+    private var timer: Timer?
+    private var timeZone: TimeZone? {
+        didSet {
+            if oldValue != timeZone {
+                if let timeZone = timeZone {
+                    timeFormatter.timeZone = timeZone
+                }
+                updateTime()
+            }
+        }
+    }
+    
+    private let timeFormatter:DateFormatter = {
         let fmt = DateFormatter()
-        fmt.dateFormat = "h:mm a"
-        
+        fmt.timeStyle = .short
+        fmt.dateFormat = .none
         return fmt
     }()
     
@@ -57,19 +69,42 @@ class NavigationCityButton: UIControl {
     }
     
     public func configure(with location:Location?) {
-        guard let loc = location else {
-            self.cityLabel.text = "N/A"
+        self.cityLabel.text = location?.cityName ?? "navigationBar.noCityAvailable".localized()
+        self.timeZone = location?.timeZone
+        configureTimer()
+    }
+    
+    private func updateTime() {
+        if timeZone != nil {
+            self.timeLabel.text = timeFormatter.string(from: Date())
+        }
+        else {
             self.timeLabel.text = nil
-            return
         }
-        
-        self.cityLabel.text = loc.cityName
-        if let today = loc.today?.date {
-            NavigationCityButton.timeFormatter.timeZone = loc.timeZone
-            self.timeLabel.text = NavigationCityButton.timeFormatter.string(from: today)
+    }
+    
+    private func configureTimer() {
+        if let timeZone = timeZone {
+            if timer == nil {
+                var calendar = Calendar(identifier: .gregorian)
+                calendar.timeZone = timeZone
+                var dateComponents = calendar.dateComponents([.year, .month, .day, .hour, .minute, .second], from: Date())
+                if let oldMinutes = dateComponents.minute {
+                    dateComponents.minute = oldMinutes + 1 // dateComponents handle rolling over 60.
+                }
+                dateComponents.second = 0
+                let firstFireDate = calendar.date(from: dateComponents) ?? Date().addingTimeInterval(5)
+                
+                let newTimer = Timer(fire: firstFireDate, interval: 30.0, repeats: true, block: { [weak self] _ in
+                    self?.updateTime()
+                })
+                RunLoop.main.add(newTimer, forMode: .common)
+                self.timer = newTimer
+            }
         }
         else {
-            self.timeLabel.text = nil
+            timer?.invalidate()
+            timer = nil
         }
     }
 }