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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

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

5. Memory Management

Memory management is an important concept in any object-oriented language, such as Objective-C. Understanding the specifics of any language’s memory-management model is vital to being able to write memory-efficient, bug-free code.

Once you understand the rules, memory management in Objective-C is not complicated and was made easier when Automatic Reference Counting (ARC) came along. ARC diverts nearly all the memory-management decisions to the compiler, leaving you to concentrate on the business logic.

Item 29: Understand Reference Counting

Objective-C uses reference counting for memory management, meaning that every object has a counter that is incremented and decremented. You increment the counter when you want to register ...

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

by Matt Galloway