Add support for specifying the minute interval (1, 5, 15, or 30)

Author: calda

Sample App/WatchKit Sample App Extension/InterfaceController.swift

@@ -22,7 +22,8 @@ class InterfaceController: WKInterfaceController {
         timePickerDataSource = TimePickerDataSource(
             hoursPicker: hourTimePicker,
             minutesPicker: minuteTimePicker,
-            amPmPicker: amPmTimePicker)
+            amPmPicker: amPmTimePicker,
+            interval: .fiveMinutes)
 
         timePickerDataSource.selectedTimeDidUpdate = { [weak self] selectedTime in
             let timeFormatter = DateFormatter()

WatchKitTimePicker.xcodeproj/xcuserdata/cal.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -4,6 +4,16 @@
 <dict>
 	<key>SchemeUserState</key>
 	<dict>
+		<key>Sample App.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>1</integer>
+		</dict>
+		<key>WatchKit Sample App.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>2</integer>
+		</dict>
 		<key>WatchKitTimePicker.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>

WatchKitTimePicker/TimePickerDataSource.swift

@@ -14,13 +14,32 @@ public class TimePickerDataSource {
     private weak var minutesPicker: WKInterfacePicker?
     private weak var amPmPicker: WKInterfacePicker?
 
+    private let interval: SelectionInterval
     public var selectedTimeDidUpdate: ((Date) -> Void)?
 
+    public enum SelectionInterval {
+        case minute
+        case fiveMinutes
+        case fifteenMinutes
+        case halfHour
+        
+        var minutesBetweenOptions: Int {
+            switch self {
+            case .minute: return 1
+            case .fiveMinutes: return 5
+            case .fifteenMinutes: return 15
+            case .halfHour: return 30
+            }
+        }
+    }
+    
     public init(
         hoursPicker: WKInterfacePicker,
         minutesPicker: WKInterfacePicker,
-        amPmPicker: WKInterfacePicker?)
+        amPmPicker: WKInterfacePicker?,
+        interval: SelectionInterval = .fiveMinutes)
     {
+        self.interval = interval
         self.hoursPicker = hoursPicker
         self.minutesPicker = minutesPicker
         self.amPmPicker = amPmPicker
@@ -48,10 +67,10 @@ public class TimePickerDataSource {
         }
     }()
 
-    private lazy var minutePickerOptions: [Int] = {
-        // create 0-60 minute entries for all 24 hours in the day.
-        return Array(repeating: Array(stride(from: 0, to: 60, by: 5)), count: 24).flatMap { $0 }
-    }()
+    /// 0-60 minute entries for all 24 hours in the day.
+    private lazy var minutePickerOptions: [Int] = { (interval: SelectionInterval) in
+        Array(repeating: Array(stride(from: 0, to: 60, by: interval.minutesBetweenOptions)), count: 24).flatMap { $0 }
+    }(self.interval)
 
     private lazy var amPmPickerOptions: [String]? = {
         if userHas24HourTimeEnabled {