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Two - Stage Creation An Example of Allocation and initialization done together in a single method : + (id)circleWithCenter:(NSPoint)aPoint radius:(float)radius { // allocation and partial initialization are provided by superclass id newInstance = [[super new] autorelease]; } Text if(nil != newInstance) // verify new instance was created { } [newInstance setCenter:aPoint]; [newInstance setRadius:radius]; [newInstance setLabel:@”default”]; return newInstance; © 2011, FuGenX <strong>Technologies</strong> Confidential 12
Two - Stage Creation Due to so many possible ways an object can be initialized there can be a huge list of initializer methods. An Example : +imageFromRegularMemoryWithContentsOfFile: +imageFromRegularMemoryWithContentsOfURL: +imageFromRegularMemoryWithData: +imageFromRegularMemoryWithPasteboard: +imageFromRegularMemoryWithSize: +imageFromGraphicsMemory:(MYCardID)aCard withContentsOfFile: +imageFromGraphicsMemory:(MYCardID)aCard withContentsOfURL: +imageFromGraphicsMemory:(MYCardID)aCard withData: +imageFromGraphicsMemory:(MYCardID)aCard withPasteboard: +imageFromGraphicsMemory:(MYCardID)aCard withSize: © 2011, FuGenX <strong>Technologies</strong> Confidential 13
Page 1 and 2: FuGenX Technologies Private Limited
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: Two Stage Creation � The Two-Stag
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 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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