What is the preferred approach to registering observers on an NSManagedObject (since Core Data \"\'owns\' the lifecycle\" of managed objects)?
Is it p开发者_Go百科ossible to add observers to simple variables such as BOOLs or NSIntegers and see when they change?
I want to add a view controller as observer of a notification. When the selector method is called, I\'ll alert the user. I would that this alert ap开发者_JAVA技巧pears only when this view controller
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