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Two - Stage Creation Coming back to NSObject’s base class method : The +alloc and +allocWithZone: methods each return a pointer to a newly allocated block of memory large enough to store an instance of the class that executed the method. The allocated memory contains zeros except for the one instance variable, isa, that all Objective-C objects are required to have.The isa variable is automatically initialized to point to the class object that allocated the memory and is the tie-in to the Objective-C language run- time that enables the instance to receive messages such as -init that are used to complete initialization. © 2011, FuGenX <strong>Technologies</strong> Confidential 14
Two - Stage Creation Zones Memory zones are a feature of Cocoa intended to improve application performance by keeping the memory for objects that are used together close together in the computer’s address space. @interface MYCircle : NSObject { Text NSPoint center; floatradius; NSString *label; } // Designated Initializer - (id)initWithCenter:(NSPoint)aPoint radius:(float)aRadius; @end © 2011, FuGenX <strong>Technologies</strong> Confidential 15
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Page 3 and 4: Model View controller - Example �
Page 5 and 6: NSObject � NSObject is a base cla
Page 7 and 8: NSObject Methods � init - Initial
Page 9 and 10: Over-riding Base Class Methods �
Page 11 and 12: Two Stage Creation � The Two-Stag
Page 13: Two - Stage Creation Due to so many
Page 17 and 18: Two - Stage creation � Regardless
Page 19 and 20: Default Template Methods Template M
Page 21 and 22: Template Method When You Should Cal
Page 23 and 24: NSObject Template Methods Template
Page 25 and 26: Dynamic Creation The basis of this
Page 27 and 28: Category We use the Category patter
Page 29 and 30: Category @implementation NSMutableA
Page 31 and 32: Singleton � The Singleton pattern
Page 33 and 34: Singleton Creating and Accessing a
Page 35 and 36: Singleton A basic implementation of
Page 37 and 38: + (id)new { return [self alloc]; }
Page 39 and 40: Deallocation Singleton + (void)atte
Page 41 and 42: Delegates � A delegate is an obje
Page 43 and 44: Delegates © 2011, FuGenX Technolog
Page 45 and 46: Delegates Slider © 2011, FuGenX Te
Page 47 and 48: @implementation Controller Delegate
Page 49 and 50: Delegates @protocol ModelDelegate
Page 51 and 52: Delegates @protocol SliderDelegate
Page 53: Thank You © 2011, FuGenX Technolog

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