Encapsulate the data specific to an application and define the logic and computation that manipulate and process that data (for example, a model object might represent a character in a game or a contact in an address book). - is an object in an application that users can see. Its purpose is to editing of that data. Controller Object Manage Object from the application's model objects and to enable the interprets user actions made in view objects and communicates new or changed data to the model layer Core Object View Object Model Object Layer Object model data display data
Encapsulate the data specific to an application and define the logic and computation that manipulate and process that data (for example, a model object might represent a character in a game or a contact in an address book). - is an object in an application that users can see. Its purpose is to editing of that data. Controller Object Manage Object from the application's model objects and to enable the interprets user actions made in view objects and communicates new or changed data to the model layer Core Object View Object Model Object Layer Object model data display data
Chapter13: Internet And Distributed Application Services
Section: Chapter Questions
Problem 1VE
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![Encapsulate the data specific to an application and define the logic and computation that manipulate and process that data (for example, a
model object might represent a character in a game or a contact in an address book).
Controller Object
-
editing of that data.
Manage Object
- is an object in an application that users can see. Its purpose is to
from the application's model objects and to enable the
- interprets user actions made in view objects and communicates new or changed data to the
model layer
Core Object
View Object
Model Object
Layer Object
model data
display data](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdfef1900-6b6b-4241-b7c7-4b23c6e468f2%2Fcb036304-bf66-4d93-8f24-b15cd449194c%2Foi043w_processed.png&w=3840&q=75)
Transcribed Image Text:Encapsulate the data specific to an application and define the logic and computation that manipulate and process that data (for example, a
model object might represent a character in a game or a contact in an address book).
Controller Object
-
editing of that data.
Manage Object
- is an object in an application that users can see. Its purpose is to
from the application's model objects and to enable the
- interprets user actions made in view objects and communicates new or changed data to the
model layer
Core Object
View Object
Model Object
Layer Object
model data
display data
![An iOS app can be in one of five states:
- The app has not been launched or was running but was terminated by the system.
- The app is running in the foreground but is currently not receiving events. An app usually stays in this state only briefly as it transitions to a
different state.
- The app is running in the foreground and is receiving events. This is the normal mode for foreground apps.
The app is in the background and executing code. Most apps enter this state briefly on their way to being suspended. However, an app that
requests extra execution time may remain in this state for a period of time. (An app being launched directly into the background enters this state instead of the
inactive state.)
- The app is in the background but is not executing code. The system moves apps to this state automatically and does not notify them before doing
so. While suspended, an app remains in memory but does not execute any code. When a low-memory condition occurs, the system may purge suspended apps
without notice to make more space for the foreground app.
Active Not running Reviving Background Frontgound Inactive
Suspended Running Stopping](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdfef1900-6b6b-4241-b7c7-4b23c6e468f2%2Fcb036304-bf66-4d93-8f24-b15cd449194c%2Fsvhxvc_processed.png&w=3840&q=75)
Transcribed Image Text:An iOS app can be in one of five states:
- The app has not been launched or was running but was terminated by the system.
- The app is running in the foreground but is currently not receiving events. An app usually stays in this state only briefly as it transitions to a
different state.
- The app is running in the foreground and is receiving events. This is the normal mode for foreground apps.
The app is in the background and executing code. Most apps enter this state briefly on their way to being suspended. However, an app that
requests extra execution time may remain in this state for a period of time. (An app being launched directly into the background enters this state instead of the
inactive state.)
- The app is in the background but is not executing code. The system moves apps to this state automatically and does not notify them before doing
so. While suspended, an app remains in memory but does not execute any code. When a low-memory condition occurs, the system may purge suspended apps
without notice to make more space for the foreground app.
Active Not running Reviving Background Frontgound Inactive
Suspended Running Stopping
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