cojoj · September 15, 2015 06:19 · Sep 15, 2015
diff --git a/defaults.swift b/defaults.swift
@@ -0,0 +1,19 @@
+func readSample(sampleType: HKSampleType, predicate: NSPredicate?, limit: Int?, completion: ((results: [HKSample]?, error: ErrorType?) -> Void)!) {
+    // Read stored anchor (If this is the first run 0 will be returned which is equal to HKAnchoredObjectQueryNoAnchor)
+    let anchorValue = defaults.integerForKey(sampleType.identifier)
+    let limit = limit ?? Int(HKObjectQueryNoLimit)
+
+    let query = HKAnchoredObjectQuery(type: sampleType, predicate: predicate, anchor: anchorValue, limit: limit) { (query, results, newAnchor, error) -> Void in
+        guard let results = results where error == nil else {
+            completion(results: nil, error: error)
+            return
+        }
+
+        // Here I'm 'dynamically' creating new keys
+        self.defaults.setInteger(newAnchor, forKey: sampleType.identifier)
+
+        completion(results: results, error: nil)
+    }
+
+    healthKitStore.executeQuery(query)
+}