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Category As an example, the following category adds convenient methods to Cocoa’s NSMutableArray class: @interface NSMutableArray (MYAdditions) - (void)addObjectIfAbsent:(id)anObject; @end © 2011, FuGenX <strong>Technologies</strong> Confidential 28
Category @implementation NSMutableArray (MYAdditions) // Adds useful methods to mutable arrays - (void)addObjectIfAbsent:(id)anObject // Adds anObject to the receiver if and only if anObject is not // nil and already contained by receiver { if((nil != anObject) && ![self containsObject:anObject]) { [self addObject:anObject]; } @end © 2011, FuGenX <strong>Technologies</strong> Confidential 29
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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 and 14: Two - Stage Creation Due to so many
Page 15 and 16: Two - Stage Creation Zones Memory z
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: Category We use the Category patter
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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