2014/10/15 下午 10:05:35

iphone Programming Glossary: copywithzone

http://stackoverflow.com/questions/4089238/implementing-nscopying

ios objective c nscopying share improve this question To implement NSCopying your object must respond to the copyWithZone selector. Here 䏭 how you declare that you conform to it @interface MyObject NSObject NSCopying Then in your object 䏭 implementation.. that you conform to it @interface MyObject NSObject NSCopying Then in your object 䏭 implementation your .m file id copyWithZone NSZone zone Copying code here. What should your code do First create a new instance of the object 㬙ou can call self class.. Then for any instance variables that are a subclass of NSObject that supports copying you can call thatObject copyWithZone zone for the new object. For primitive types int char BOOL and friends just set the variables to be equal. So for your obejct..

NSMutableString as retain/copy

http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy

by other posters is that the implementation of an immutable instance can simply retain itself in its implementation of copyWithZone . also copy gives you the expected behavior. in other words there is not a use for retaining a string if it is in fact immutable...

Using a singleton to create an array accessible by multiple views

http://stackoverflow.com/questions/6324732/using-a-singleton-to-create-an-array-accessible-by-multiple-views

id allocWithZone NSZone zone if mySingleton mySingleton super allocWithZone zone return mySingleton else return nil id copyWithZone NSZone zone return self void release NO OP @end EDIT 2 This is how I'm trying to use my singleton object to have an array..

Correct Singleton Pattern Objective C (iOS)?

http://stackoverflow.com/questions/7598820/correct-singleton-pattern-objective-c-ios

MySingleton MARK MARK Singleton Pattern using GCD id allocWithZone NSZone zone return self sharedInstance retain id copyWithZone NSZone zone return self id autorelease return self oneway void release Singletons can't be released void dealloc super dealloc..

iOS : How to reference a music background from a singleton class?

http://stackoverflow.com/questions/8455576/ios-how-to-reference-a-music-background-from-a-singleton-class

super allocWithZone nil init return sharedMyManager id allocWithZone NSZone zone return self sharedManager id copyWithZone NSZone zone return self #if __has_feature objc_arc id retain return self unsigned retainCount return UINT_MAX denotes an..

Best practice when implementing copyWithZone:

http://stackoverflow.com/questions/9907154/best-practice-when-implementing-copywithzone

practice when implementing copyWithZone I am trying to clear up a few things in my head about implementing copyWithZone can anyone comment on the following ..... practice when implementing copyWithZone I am trying to clear up a few things in my head about implementing copyWithZone can anyone comment on the following ... 001 Crime is a subclass of NSObject. id copyWithZone NSZone zone Crime newCrime.. head about implementing copyWithZone can anyone comment on the following ... 001 Crime is a subclass of NSObject. id copyWithZone NSZone zone Crime newCrime self class allocWithZone zone init if newCrime newCrime setMonth self month newCrime setCategory..