book

Effective Objective-C 2.0: 52 Specific Ways to Improve Your iOS and OS X Programs

Name: Effective Objective-C 2.0: 52 Specific Ways to Improve Your iOS and OS X Programs
Author: Matt Galloway
ISBN: 9780133386950

by Matt Galloway

May 2013

Intermediate to advanced

320 pages

9h 15m

English

Addison-Wesley Professional

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About This eBook
Title Page
Copyright Page
Dedication Page
Contents
Preface
About This BookAudience for This BookWhat This Book Covers
Acknowledgments
About the Author
1. Accustoming Yourself to Objective-C
Item 1: Familiarize Yourself with Objective-C’s RootsItem 2: Minimize Importing Headers in HeadersItem 3: Prefer Literal Syntax over the Equivalent MethodsItem 4: Prefer Typed Constants to Preprocessor #defineItem 5: Use Enumerations for States, Options, and Status Codes
2. Objects, Messaging, and the Runtime
Item 6: Understand PropertiesItem 7: Access Instance Variables Primarily Directly When Accessing Them InternallyItem 8: Understand Object EqualityItem 9: Use the Class Cluster Pattern to Hide Implementation DetailItem 10: Use Associated Objects to Attach Custom Data to Existing ClassesItem 11: Understand the Role of objc_msgSendItem 12: Understand Message ForwardingItem 13: Consider Method Swizzling to Debug Opaque MethodsItem 14: Understand What a Class Object Is

3. Interface and API Design
Item 15: Use Prefix Names to Avoid Namespace ClashesItem 16: Have a Designated InitializerItem 17: Implement the description MethodItem 18: Prefer Immutable ObjectsItem 19: Use Clear and Consistent NamingItem 20: Prefix Private Method NamesItem 21: Understand the Objective-C Error ModelItem 22: Understand the NSCopying Protocol
4. Protocols and Categories
Item 23: Use Delegate and Data Source Protocols for Interobject CommunicationItem 24: Use Categories to Break Class Implementations into Manageable SegmentsItem 25: Always Prefix Category Names on Third-Party ClassesItem 26: Avoid Properties in CategoriesItem 27: Use the Class-Continuation Category to Hide Implementation DetailItem 28: Use a Protocol to Provide Anonymous Objects
5. Memory Management
Item 29: Understand Reference CountingItem 30: Use ARC to Make Reference Counting EasierItem 31: Release References and Clean Up Observation State Only in deallocItem 32: Beware of Memory Management with Exception-Safe CodeItem 33: Use Weak References to Avoid Retain CyclesItem 34: Use Autorelease Pool Blocks to Reduce High-Memory WaterlineItem 35: Use Zombies to Help Debug Memory-Management ProblemsItem 36: Avoid Using retainCount
6. Blocks and Grand Central Dispatch
Item 37: Understand BlocksItem 38: Create typedefs for Common Block TypesItem 39: Use Handler Blocks to Reduce Code SeparationItem 40: Avoid Retain Cycles Introduced by Blocks Referencing the Object Owning ThemItem 41: Prefer Dispatch Queues to Locks for SynchronizationItem 42: Prefer GCD to performSelector and FriendsItem 43: Know When to Use GCD and When to Use Operation QueuesItem 44: Use Dispatch Groups to Take Advantage of Platform ScalingItem 45: Use dispatch_once for Thread-Safe Single-Time Code ExecutionItem 46: Avoid dispatch_get_current_queue
7. The System Frameworks
Item 47: Familiarize Yourself with the System FrameworksItem 48: Prefer Block Enumeration to for LoopsItem 49: Use Toll-Free Bridging for Collections with Custom Memory-Management SemanticsItem 50: Use NSCache Instead of NSDictionary for CachesItem 51: Keep initialize and load Implementations LeanItem 52: Remember that NSTimer Retains Its Target
Index

Overview

Write Truly Great iOS and OS X Code with Objective-C 2.0!

Effective Objective-C 2.0 will help you harness all of Objective-C’s expressive power to write OS X or iOS code that works superbly well in production environments. Using the concise, scenario-driven style pioneered in Scott Meyers’ best-selling Effective C++, Matt Galloway brings together 52 Objective-C best practices, tips, shortcuts, and realistic code examples that are available nowhere else.

Through real-world examples, Galloway uncovers little-known Objective-C quirks, pitfalls, and intricacies that powerfully impact code behavior and performance. You’ll learn how to choose the most efficient and effective way to accomplish key tasks when multiple options exist, and how to write code that’s easier to understand, maintain, and improve. Galloway goes far beyond the core language, helping you integrate and leverage key Foundation framework classes and modern system libraries, such as Grand Central Dispatch.

Coverage includes

Optimizing interactions and relationships between Objective-C objects

Mastering interface and API design: writing classes that feel “right at home”

Using protocols and categories to write maintainable, bug-resistant code

Avoiding memory leaks that can still occur even with Automatic Reference Counting (ARC)

Writing modular, powerful code with Blocks and Grand Central Dispatch

Leveraging differences between Objective-C protocols and multiple inheritance in other languages

Improving code by more effectively using arrays, dictionaries, and sets

Uncovering surprising power in the Cocoa and Cocoa Touch frameworks

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