Foundation

Overview

The Foundation framework provides a base layer of functionality for apps and frameworks, including data storage and persistence, text processing, date and time calculations, sorting and filtering, and networking. The classes, protocols, and data types defined by Foundation are used throughout the macOS, iOS, watchOS, and tvOS SDKs.

Topics

Fundamentals

• Numbers, Data, and Basic Values
• Strings and Text
• Collections
• Dates and Times
• Units and Measurement
• Data Formatting
• Filters and Sorting

App Support

• Task Management
• Resources
• Notifications
• App Extension Support
• Errors and Exceptions
• Scripting Support

Files and Data Persistence

• File System
• Archives and Serialization
• Settings
• Spotlight
• iCloud
• Optimizing Your App’s Data for iCloud Backup

Networking

• URL Loading System
• Bonjour

Low-Level Utilities

• XPC
• Object Runtime
• Processes and Threads
• Streams, Sockets, and Ports

Reference

• Foundation Enumerations
• Foundation Data Types

Classes

• ProgressManager
• ProgressReporter

Protocols

• NSPredicateValidating

Structures

• Subprogress