MVC in iOS apps
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The document discusses the Model-View-Controller (MVC) design pattern used in iOS development. It describes the relationships and communication between the main MVC components: the model, the view, and the controller. Specifically, it outlines that the view gets and displays data from the controller, notifies the controller of user interactions, and the controller acts as the intermediary between the model and view by updating both and formatting data from the model for the view.
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- 1. 04/16 Stefan Erdmann 1 Cocoa Touch | Model-View-Controller Controller Model View
- 2. 04/16 Stefan Erdmann 2 Cocoa Touch | Model-View-Controller Controller Model View View notifies controller when things happen in the UI View asks controller for data
- 3. 04/16 Stefan Erdmann 3 Cocoa Touch | Model-View-Controller Controller interpret/format model information for the view Controller Model View Controller updates model View notifies controller when things happen in the UI View asks controller for data
- 4. 04/16 Stefan Erdmann 4 Cocoa Touch | Model-View-Controller Controller interpret/format model information for the view Controller Model View Controller updates model View notifies controller when things happen in the UI View asks controller for data Model informs controllers about changes
- 5. 04/16 Stefan Erdmann 5 Cocoa Touch | Model-View-Controller Controller interpret/format model information for the view Controller Model View Controller updates view Controller updates model View notifies controller when things happen in the UI View asks controller for data Model informs controllers about changes
- 6. 04/16 Stefan Erdmann 6 Cocoa Touch | Model-View-Controller Controller interpret/format model information for the view Controller Model View! No direct communication Controller updates view Controller updates model View notifies controller when things happen in the UI View asks controller for data Model informs controllers about changes
- 7. 04/16 Stefan Erdmann 7 Cocoa Touch | MVC iOS Specific Controller Model View
- 8. 04/16 Stefan Erdmann 8 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication
- 9. 04/16 Stefan Erdmann 9 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication View elements can be connected to the controller via outlets
- 10. 04/16 Stefan Erdmann 10 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication Controller can register a target and the view sends actions (can also reach controller via responder chain)
- 11. 04/16 Stefan Erdmann 11 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication delegate View informs controller about state changes (table-view informs about which rows are selected)
- 12. 04/16 Stefan Erdmann 12 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication delegate datasource View elements define protocols which controllers have to conform to in order to provide data for the view (see table view data source delegate)
- 13. 04/16 Stefan Erdmann 13 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication delegate datasource Controller has a direct reference to the model
- 14. 04/16 Stefan Erdmann 14 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication delegate datasource Model can inform the controller about data modifications via a delegate (see FetchedResultController)
- 15. 04/16 Stefan Erdmann 15 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication delegate datasource Notifications Controller can register with a notification center in order to receive messages from the model
- 16. 04/16 Stefan Erdmann 16 Cocoa Touch | MVC iOS Specific Controller Model View! No direct communication delegate datasource Notifications KVO Controller can observe properties of the model and is automatically informed about data modifications (Key-Value-Observing)
Editor's Notes
- Controller: beinhaltet die Logik zur View Formatiert Daten für die View Validiert Daten auf der View Model: beinhaltet die Business Logik zu den Daten
- Controller: beinhaltet die Logik zur View Formatiert Daten für die View Validiert Daten auf der View Model: beinhaltet die Business Logik zu den Daten
- Controller: beinhaltet die Logik zur View Formatiert Daten für die View Validiert Daten auf der View Model: beinhaltet die Business Logik zu den Daten
- Controller: beinhaltet die Logik zur View Formatiert Daten für die View Validiert Daten auf der View Model: beinhaltet die Business Logik zu den Daten
- Controller: beinhaltet die Logik zur View Formatiert Daten für die View Validiert Daten auf der View Model: beinhaltet die Business Logik zu den Daten
- Controller: beinhaltet die Logik zur View Formatiert Daten für die View Validiert Daten auf der View Model: beinhaltet die Business Logik zu den Daten
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern
- View Target Action: controller registers as target – View sends action (could also reach the controller via the responder chain) Delegate: View informs controller about state changes, tableview informs controller about rows which are selected... Data source: View defines protocol of methods which view uses to get information about the data in a specific format (see tableview data source delegate) Controller Outlet Direct reference Model Notifications werden gesendet – Controller können sich für bestimmte Nachrichtenpools registrieren KVO – Key Value Observing – Controller kann sich für Änderungen an Properties registrieren (you can use key-value observing with a Swift class, as long as the class inherits from the NSObject class) Delegate – FetchedResultController informiert Controller wenn Daten sich ändern