我在Xcode中收到此警告comparisonofaddressesofNSUbiquitycontainerDidChangeNotificationnotequaltoanullpointerisalwaystrue它在CoreDataEnsemblesFramework中CDEICloudFileSystem.m在-(void)addUbiquityContainerNotificationObservers{[selfremoveUbiquityContainerNotificationObservers];///inthislineif(&NSUbiquityIdentity

swift1.2Xcode6长期倾听者，初来乍到者。你好，直截了本地说:“要处理iCloud可用性的变化，请注册以接收NSUbiquityIdentityDidChangeNotification通知。”这是他们提供的用于实现此目的的代码:[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(iCloudAccountAvailabilityChanged:)name:NSUbiquityIdentityDidChangeNotificationobject:nil];我在我的应用程序中将其Swif