问iCloud键值同步iOS8 Xcode 6

EN

- (void)viewDidLoad{

    [super viewDidLoad];

    [self checkICloudData];
}

- (void)checkICloudData
{
    NSFileManager * fileManager=[NSFileManager defaultManager];

    NSURL *iCloudURL=[fileManager URLForUbiquityContainerIdentifier:nil];

    NSLog(@"iCloud URL is %@",[iCloudURL absoluteString]);

    if (iCloudURL){

        NSUbiquitousKeyValueStore * store=[NSUbiquitousKeyValueStore defaultStore];

        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(updateICloudData:)
                                                     name:NSUbiquitousKeyValueStoreDidChangeExternallyNotification
                                                   object:store];
        [store synchronize];
    }else{
        NSLog(@"iCloud is not supported or enabled");
        [self loadDataFromBundle];

    }
}

- (void)checkICloudData
{   
    NSUbiquitousKeyValueStore * store=[NSUbiquitousKeyValueStore defaultStore];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(updateICloudData:)
                                                 name:NSUbiquitousKeyValueStoreDidChangeExternallyNotification
                                               object:store];
    [store synchronize];
}

- (void)updateICloudData:(NSNotification*)notification
{
    NSDictionary *userInfo = [notification userInfo];
    NSNumber *changeReason = [userInfo objectForKey:NSUbiquitousKeyValueStoreChangeReasonKey];
    NSInteger reason = -1;

    if (!changeReason) {
        return;
    } else {
        reason = [changeReason integerValue];
    }

    if ((reason == NSUbiquitousKeyValueStoreServerChange) || (reason == NSUbiquitousKeyValueStoreInitialSyncChange)) {
        NSArray *changedKeys = [userInfo objectForKey:NSUbiquitousKeyValueStoreChangedKeysKey];

        for (NSString *key in changedKeys) {
            if ([key isEqualToString:casesKey]) {
                [self iCloudNotification];
            }else {
                [self loadDataFromBundle];

            }
        }
    }
}