Prefix support to selectively sync keys with a given prefix

MugunthKumar · May 31, 2015 · 4781c7c · 4781c7c
1 parent 9e57c89
commit 4781c7c
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Showing 2 changed files with 65 additions and 65 deletions.
diff --git a/MKiCloudSync.h b/MKiCloudSync.h
@@ -41,5 +41,5 @@
 
 @interface MKiCloudSync : NSObject
 
-+(void) start;
++(void) startWithPrefix:(NSString*) prefixToSync;
 @end
diff --git a/MKiCloudSync.m b/MKiCloudSync.m
@@ -23,86 +23,86 @@
 //  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 //  THE SOFTWARE.
 
-//  As a side note, you might also consider 
+//  As a side note, you might also consider
 //	1) tweeting about this mentioning @mugunthkumar
 //	2) A paypal donation to mugunth.kumar@gmail.com
 
 
 #import "MKiCloudSync.h"
 
+static NSString *prefix;
 @implementation MKiCloudSync
 
 +(void) updateToiCloud:(NSNotification*) notificationObject {
-
-    NSDictionary *dict = [[NSUserDefaults standardUserDefaults] dictionaryRepresentation];
-
-    [dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
-
-        [[NSUbiquitousKeyValueStore defaultStore] setObject:obj forKey:key];
-    }];
-
-    [[NSUbiquitousKeyValueStore defaultStore] synchronize];
+
+  NSDictionary *dict = [[NSUserDefaults standardUserDefaults] dictionaryRepresentation];
+
+  [dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
+
+    if([key hasPrefix:prefix]) {
+      [[NSUbiquitousKeyValueStore defaultStore] setObject:obj forKey:key];
+    }
+  }];
+
+  [[NSUbiquitousKeyValueStore defaultStore] synchronize];
 }
 
 +(void) updateFromiCloud:(NSNotification*) notificationObject {
-
-    NSUbiquitousKeyValueStore *iCloudStore = [NSUbiquitousKeyValueStore defaultStore];
-    NSDictionary *dict = [iCloudStore dictionaryRepresentation];
-
-    // prevent NSUserDefaultsDidChangeNotification from being posted while we update from iCloud
-
-    [[NSNotificationCenter defaultCenter] removeObserver:self 
-                                                    name:NSUserDefaultsDidChangeNotification 
-                                                  object:nil];
-
-    [dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
-
-        [[NSUserDefaults standardUserDefaults] setObject:obj forKey:key];
-    }];
-
-    [[NSUserDefaults standardUserDefaults] synchronize];
-
-    // enable NSUserDefaultsDidChangeNotification notifications again
-
-    [[NSNotificationCenter defaultCenter] addObserver:self 
-                                             selector:@selector(updateToiCloud:) 
-                                                 name:NSUserDefaultsDidChangeNotification                                                    
-												object:nil];
-
-    [[NSNotificationCenter defaultCenter] postNotificationName:kMKiCloudSyncNotification object:nil];
-}
 
-+(void) start {
-
-    if(NSClassFromString(@"NSUbiquitousKeyValueStore")) { // is iOS 5?
-
-        if([NSUbiquitousKeyValueStore defaultStore]) {  // is iCloud enabled
-
-            [[NSNotificationCenter defaultCenter] addObserver:self 
-                                                     selector:@selector(updateFromiCloud:) 
-                                                         name:NSUbiquitousKeyValueStoreDidChangeExternallyNotification 
-                                                       object:nil];
-
-            [[NSNotificationCenter defaultCenter] addObserver:self 
-                                                     selector:@selector(updateToiCloud:) 
-                                                         name:NSUserDefaultsDidChangeNotification                                                    object:nil];
-        } else {
-            DLog(@"iCloud not enabled");          
-        }
-    }
-    else {
-        DLog(@"Not an iOS 5 device");        
+  NSUbiquitousKeyValueStore *iCloudStore = [NSUbiquitousKeyValueStore defaultStore];
+  NSDictionary *dict = [iCloudStore dictionaryRepresentation];
+
+  // prevent NSUserDefaultsDidChangeNotification from being posted while we update from iCloud
+
+  [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                  name:NSUserDefaultsDidChangeNotification
+                                                object:nil];
+
+  [dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
+
+    if([key hasPrefix:prefix]) {
+      [[NSUserDefaults standardUserDefaults] setObject:obj forKey:key];
     }
+  }];
+
+  [[NSUserDefaults standardUserDefaults] synchronize];
+
+  // enable NSUserDefaultsDidChangeNotification notifications again
+
+  [[NSNotificationCenter defaultCenter] addObserver:self
+                                           selector:@selector(updateToiCloud:)
+                                               name:NSUserDefaultsDidChangeNotification
+                                             object:nil];
+
+  [[NSNotificationCenter defaultCenter] postNotificationName:kMKiCloudSyncNotification object:nil];
+}
+
++(void) startWithPrefix:(NSString*) prefixToSync {
+
+  prefix = prefixToSync;
+  if([NSUbiquitousKeyValueStore defaultStore]) {  // is iCloud enabled
+
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateFromiCloud:)
+                                                 name:NSUbiquitousKeyValueStoreDidChangeExternallyNotification
+                                               object:nil];
+
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateToiCloud:)
+                                                 name:NSUserDefaultsDidChangeNotification                                                    object:nil];
+  } else {
+    DLog(@"iCloud not enabled");
+  }
 }
 
 + (void) dealloc {
-    
-    [[NSNotificationCenter defaultCenter] removeObserver:self 
-                                                    name:NSUbiquitousKeyValueStoreDidChangeExternallyNotification 
-                                                  object:nil];
-
-    [[NSNotificationCenter defaultCenter] removeObserver:self 
-                                                    name:NSUserDefaultsDidChangeNotification 
-                                                  object:nil];
+
+  [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                  name:NSUbiquitousKeyValueStoreDidChangeExternallyNotification
+                                                object:nil];
+
+  [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                  name:NSUserDefaultsDidChangeNotification
+                                                object:nil];
 }
 @end