Mac OS X Leopard - ARCAism

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502 CHAPTER 26 MAC <strong>OS</strong> X DEVELOPMENT: OBJECTIVE-C + (void)load; { Method oldMethod = class_getInstanceMethod(self, @selector(description)); Method newMethod = class_getInstanceMethod(self, @selector(prettyDescription)); method_exchangeImplementations(oldMethod, newMethod); } - (NSString *)prettyDescription; { return [self XMLStringWithOptions:NSXMLNodePrettyPrint]; } @end Now when we log our XML node, we get the desired results: NSXMLNode *xmlNode; // ... load above XML document NSLog(@"Current node: %@", xmlNode); Current node: My Blog http://www.worldofkevin.com/Site/Blog/Blog.html Welcome to my blog: Alit, Enit, Laore, Eros Vel, Exer Dolorer, Niam Lut. iWeb 1.1.2 http://www.worldofkevin.com/Site/Blog/Blog_files/200206373-3-a.png My Blog http://www.worldofkevin.com/Site/Blog/Blog.html Red Vines: the perfect super food http://www.worldofkevin.com/Site/Blog/88DD8356-E484-44DD-9419- AE9F936E8BAD.html http://www.worldofkevin.com/Site/Blog/88DD8356-E484-44DD-9419- AE9F936E8BAD.html Mon, 20 Aug 2007 10:48:11 -0700 <a href='http://www.worldofkevin.com/Site/Blog/88DD8356-E484-44DD -9419-AE9F936E8BAD_files/FD004359-1.jpg'><img src='http://www.worldofkevin.com/Site/Blog/Images/FD004359-1.jpg' style='float:left; padding-right:10px; padding-bottom:10px; width:109px; height:79px;'/></a>Eliquatuero dip numsan vent lam, conum facillum init lut doloreet ullametuero od tet adit, commod tatummy feug tiam velit praese exer auteenit alit, veliqua modit dolorer commod niam onul laore. Uptat prat lut lut iriliquat,quis alisl irilit am irillum at niam zzrit, verosto consequ ismodit irius
Magic, right? A few lines bear closer examination. First, the functions for directly interacting with the runtime are not part of Cocoa, so they have to be imported separately: #import To facilitate just this sort of goings on, the runtime sends the load message to any class as it’s being loaded but before it’s used. This is the perfect place to accomplish what you need to do: + (void)load; To swap the implementations of the methods, you have to get the methods: Method oldMethod = class_getInstanceMethod(self, @selector(description)); The compiler directive @selector converts the name of a method into a SEL, as required by the function class_getInstanceMethod, which returns a Method. The Method is a struct that contains a selector of type SEL, an implementation of type IMP, and some return type encoding information. With the methods in hand, all you have to do is swap their implementations. method_exchangeImplementations(oldMethod, newMethod); As far as the runtime is concerned, the two methods have literally had their implementations swapped. The message description will now call the implementation you defined for prettyDescription. The inverse is also true; calling prettyDescription will return the original implementation of description. So, to “call super” from within the new implementation, it has to call itself. - (NSString *)prettyDescription; { NSString *oldDescription = [self prettyDescription]; ... } Weird, right? In Objective-C, nothing is ever written in stone. Even without wandering far from the comforts of object-oriented programming, you have the power to pull off staggering feats of engineering brilliance. Key Value Coding In recent years, the designers of Objective-C have begun making use of heretofore informal aspects of the language. For example, given a property key, you can assume its getter is key and its setter is setKey:. Alternately, if key is a Boolean property, you can assume its getter is isKey. By making this assumption about the predictability of method names, the system can enable a new level of dynamic behavior known as key value coding (KVC). KVC treats every property as a named key and introduces a generic form for getting or setting any property by name: id property = [myObject valueForKey:@"property"]; [otherObject setValue:property forKey:@"property"]; CHAPTER 26 MAC <strong>OS</strong> X DEVELOPMENT: OBJECTIVE-C 503 By allowing you to refer to properties by name, KVC lets you do the following: • Resolve property names at runtime. • Deal with unknown or empty keys on the fly. • Store keys in collections and deal with them en masse without regard to type.
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Mac OS X Leopard: Beyond the Manual
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PART 5 Getting to Know Darwin CHAPT
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viii CONTENTS CHAPTER 2 The File Sy
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x CONTENTS CHAPTER 7 Managing Appli
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xii CONTENTS CHAPTER 12 Address Boo
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xiv CONTENTS CHAPTER 16 iLife ’08
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xvi CONTENTS CHAPTER 21 Port Forwar
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xviii CONTENTS CHAPTER 25 Quick Loo
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xx CONTENTS Running Microsoft Windo
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xxii Acknowledgments First of all,
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Getting to Know Leopard PART 1
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4 CHAPTER 1 WORKING IN LEOPARD: THE
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10 CHAPTER 1 WORKING IN LEOPARD: TH
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28 CHAPTER 2 THE FILE SYSTEM Figure
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30 CHAPTER 2 THE FILE SYSTEM Table
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32 CHAPTER 2 THE FILE SYSTEM Table
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34 CHAPTER 2 THE FILE SYSTEM While
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36 CHAPTER 2 THE FILE SYSTEM Hidden
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38 CHAPTER 3 USING SPOTLIGHT, EXPOS
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System Preferences Many of the conf
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Option Description Click in the scr
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Table 4-2. Desktop Image Aspect Sel
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Dock The Dock preference pane (Figu
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CHAPTER 4 SYSTEM PREFERENCES 59 Fig
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Figure 4-11. The Input Menu tab in
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Figure 4-13. The Spotlight preferen
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Figure 4-16. The Display tab of the
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NOTE As you may have noticed, click
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Figure 4-22. When you have multiple
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The Options tab (Figure 4-25) provi
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Figure 4-26. The Keyboard tab in th
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Figure 4-28. The Mouse tab on the K
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Processor When you install the Xcod
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Internet & Network The next section
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Selecting Login Options (Figure 4-3
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This window requires some basic inf
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Figure 4-44. The Time Zone tab in t
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Figure 4-47. The Simple Finder The
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Figure 4-49. The Mail & iChat tab o
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Figure 4-52. The Software Update pr
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The Text to Speech tab (Figure 4-55
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Figure 4-57. The Seeing tab of the
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Figure 4-60. The Keyboard tab provi
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Today more and more features are bu
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At this point, you may be skeptical
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CHAPTER 5 CONNECTING PERIPHERALS TO
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CHAPTER 5 CONNECTING PERIPHERALS TO
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Figure 5-7. The printer Options she
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Connecting Bluetooth Devices Blueto
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The Bluetooth Setup Assistant will
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Figure 5-18. Finished successfully!
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CAUTION To eject media in Leopard,
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Connecting Other Peripherals Beside
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The Ink preference pane (Figure 5-2
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122 CHAPTER 6 COMMON LEOPARD MAINTE
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136 CHAPTER 7 BACKUP, SYNCHRONIZATI
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144 CHAPTER 8 LEOPARD SECURITY •
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146 CHAPTER 8 LEOPARD SECURITY NOTE
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148 CHAPTER 8 LEOPARD SECURITY Figu
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150 CHAPTER 8 LEOPARD SECURITY Figu
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152 CHAPTER 8 LEOPARD SECURITY •
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154 CHAPTER 8 LEOPARD SECURITY Summ
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Connecting to the Internet One of t
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Usually those three steps should ge
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NOTE One application notably missin
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Technology Description CHAPTER 9 CO
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Making an Ethernet Connection CHAPT
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Figure 9-7. A PPPoE connection work
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LEAP: Lightweight Extensible Authen
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Browsing the Web with Safari Leopar
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Figure 10-2. You can customize your
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Menu/Submenu Item Keyboard Shortcut
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Figure 10-4. All of your bookmarks,
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Figure 10-6. Safari running with ma
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CHAPTER 10 BROWSING THE WEB WITH SA
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Figure 10-10. The AutoFill options
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Private Browsing Another way to pro
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RSS Feeds in Safari RSS (Really Sim
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On the right side of the view area
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Figure 10-16. Selecting a region in
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Mail, Address Book, and iCal Mail T
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Item Keyboard Shortcut Description
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Figure 11-2. The first step in addi
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CHAPTER 11 MAIL, ADDRESS BOOK, AND
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When you select a message, its cont
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Creating Mail Rules CHAPTER 11 MAIL
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Figure 11-11. Mail will open a shee
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Using Mail Stationery The Mail appl
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Figure 11-14. Leopard’s Address B
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Creating Groups You might want to c
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Figure 11-17. iCal in Leopard (Week
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Adding Time Zone Support iCal has a
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iChat Instant messaging has been ga
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Figure 12-2. The Account Setup shee
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NOTE For more options, see the “C
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Ironically, the IM central server a
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For best results, select an even, n
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NOTE The Share My Screen... and Ask
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• Collect chats into a single win
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Figure 12-14. Tabbed chat helps you
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Working with Applications PART 4
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248 CHAPTER 13 APPLICATION BASICS S
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250 CHAPTER 13 APPLICATION BASICS F
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252 CHAPTER 13 APPLICATION BASICS F
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254 CHAPTER 13 APPLICATION BASICS T
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256 CHAPTER 14 APPLE APPS INCLUDED
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266 CHAPTER 15 .MAC NOTE You can al
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268 CHAPTER 15 .MAC iDisk Another f
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iLife ’08 Apple’s iLife ’08 i
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NOTE iPhoto keeps track of all your
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Figure 16-3. iMovie ’08 and its n
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Figure 16-5. Building a Welcome pag
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New in GarageBand ’08 is a featur
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iWork ’08 Apple has been producin
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One great feature of Keynote is tha
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Figure 17-4. A Pages document in Pa
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Getting to Know Darwin PART 5
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290 CHAPTER 18 INTRODUCING DARWIN A
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330 CHAPTER 19 EXTENDING THE POWER
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Leopard Networking The Mac is known
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Selecting Always Allow will add the
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You can also use Little Snitch to s
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theory behind Ping is that any mach
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So, while Network Utility is a good
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Apple includes a second utility for
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Figure 20-11. Setting up port forwa
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366 CHAPTER 21 WORKING WITH REMOTE
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Leopard As a Web Server There are s
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Figure 22-3. The Networking pane of
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If you’re developing web content,
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VirtualHost If you’ve got a web s
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What makes this directive interesti
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all that stuff is now handled autom
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Figure 22-7. The MySQL pane in Syst
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Domain Name Tricks Were you so incl
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PART Leopard Development and Script
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402 CHAPTER 23 MAC OS X AUTOMATION
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What is it about the Mac that makes
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Figure 24-2. Cocoa components in In
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Figure 24-3. Core Data modeling in
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Not so fast! CHAPTER 24 MAC OS X DE
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Figure 24-6. Address Book’s Peopl
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CHAPTER 24 MAC OS X DEVELOPMENT: TH
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Publication Subscription Syndicatio
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Figure 24-16. Core Animation’s ef
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On Mac OS X, this abstraction goes
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Ruby is the new hotness, and it shi
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WebObjects A kind of Cocoa for the
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448 CHAPTER 25 MAC OS X DEVELOPMENT
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450 CHAPTER 25 MAC OS X DEVELOPMENT
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Page 541 and 542: Occasionally while using Leopard, y
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Page 549: Appendixes
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552 APPENDIX B INSTALLING MAC OS X
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Index Symbols and Numerics # (hash)
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alloc method, Objective-C, 483, 492
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Attach File command, Mail, 199 atta
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CalDAV standard, 430 iCal and, 227
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emote computing by Secure Shell in
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digital cameras connecting, 117-118
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saving text, 318, 319 searching tex
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filters Core Image filters, 439 Ima
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ftps (FTP Secure), 367 function key
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Instant Message framework, 431 inte
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IP addresses, 163 configuring Mac f
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list (port list) command, MacPorts,
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memory management, Objective-C, 482
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New Message window, Mail, 217 New N
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password sheet creating keychains a
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opening, 106 Supply Levels tab, 106
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unning PowerPC code, 518 Rotate too
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Services option, Mail, 198 set comm
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Spotlight Comments section, Info wi
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identifying differences in document
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users running commands, 303 who els
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Window items, Safari, 178 Window me
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