Here is an explanation of the differences between using a delegate and notifications in Objective-C:
Delegates
- Delegates are a one-to-one communication pattern where one object acts on behalf of another object.
- The delegating object maintains a strong reference to its delegate.
- Delegates are typically used for responding to specific events or actions that occur in the delegating object.
- Delegates allow for customization and control over the behavior of the delegating object.
- Delegates are commonly used in UIKit and Foundation frameworks, such as
UITableViewDelegate
and NSURLSessionDelegate
.
Notifications
- Notifications are a one-to-many communication pattern where an object can broadcast information to multiple observers.
- Notifications use a publish-subscribe model, where the broadcasting object does not maintain references to its observers.
- Observers register themselves to receive notifications of specific types.
- Notifications are used for broadcasting general information or events that may be of interest to multiple objects.
- Notifications are commonly used in the `NSNotificati...