Objective-C Fundamentals

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Beyond the basics 255 attributeName]; break; case NSValidationRelationshipExceedsMaximumCountError: msg = [NSString stringWithFormat: @"The relationship '%@' has too many entries.", attributeName]; break; case NSValidationRelationshipDeniedDeleteError: msg = [NSString stringWithFormat: @"To delete, the relationship '%@' must be empty.", attributeName]; break; case NSValidationNumberTooLargeError: msg = [NSString stringWithFormat: @"The number of the attribute '%@' is too large.", attributeName]; break; case NSValidationNumberTooSmallError: msg = [NSString stringWithFormat: @"The number of the attribute '%@' is too small.", attributeName]; break; case NSValidationDateTooLateError: msg = [NSString stringWithFormat: @"The date of the attribute '%@' is too late.", attributeName]; break; case NSValidationDateTooSoonError: msg = [NSString stringWithFormat: @"The date of the attribute '%@' is too soon.", attributeName]; break; case NSValidationInvalidDateError: msg = [NSString stringWithFormat: @"The date of the attribute '%@' is invalid.", attributeName]; break; case NSValidationStringTooLongError: msg = [NSString stringWithFormat: @"The text of the attribute '%@' is too long.", attributeName]; break; case NSValidationStringTooShortError: msg = [NSString stringWithFormat: @"The text of the attribute '%@' is too short.", attributeName]; break; case NSValidationStringPatternMatchingError: msg = [NSString stringWithFormat: @"The text of the attribute '%@' " "doesn't match the required pattern.", attributeName]; break; default: msg = [NSString stringWithFormat:
256 CHAPTER 12 Reading and writing application data } break; @"Unknown error (code %i).", [error code]]; } } } } messages = [messages stringByAppendingFormat:@"%@%@%@\n", (entityName?:@""), (entityName?@": ":@""), msg]; Append message to string of messages UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Validation Error" message:messages delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil]; [alert show]; [alert release]; Display the message(s) 12.6 Summary Core Data is a sophisticated framework for all your data needs. It’s powerful yet easy to use. Now that you’re done with this chapter you have all the knowledge you need to go out there and use Core Data in your awesome iOS applications. Make sure you put this knowledge to use, because if your application has to store any kind of data that goes beyond a volume setting or a username, you should use Core Data. In chapter 13, we explore what New York City’s Grand Central Terminal has to do with programming when we learn about Grand Central Dispatch and blocks.
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Christopher K. Fairbairn Johannes F
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Objective-C Fundamentals CHRISTOPHE
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PART 1 brief contents GETTING START
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viii CONTENTS 1.5 Compiling the Coi
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x CONTENTS 5.4 Declared properties
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xii CONTENTS PART 3 MAKING MAXIMUM
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preface Having been involved in the
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ACKNOWLEDGMENTS xvii Christopher wo
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ABOUT THIS BOOK xix skills. There
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author online Purchase of Objective
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Part 1 Getting started with Objecti
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4 CHAPTER 1 Building your first iOS
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10 CHAPTER 1 Building your first iO
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Data types, variables, and constant
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30 CHAPTER 2 Data types, variables,
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56 CHAPTER 3 An introduction to obj
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Storing data in collections This ch
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76 CHAPTER 4 Storing data in collec
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Creating classes This chapter cover
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Declaring the interface of a class
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Providing an implementation for a c
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Declared properties 109 - (Property
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Declared properties 111 Let’s bri
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Declared properties 113 Although @s
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Creating and destroying objects 115
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Using the class in the Rental Manag
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Summary 123 a number of rental prop
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Subclassing 125 the only class you
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Adding new instance variables 127 s
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Accessing existing instance variabl
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Overriding methods 131 } return gen
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Overriding methods 133 } "for $%@ p
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Class clusters 135 Figure 6.2 Graph
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Categories 137 This code tells the
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Subclassing in your demo applicatio
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Subclassing in your demo applicatio
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Summary 143 6.8 Summary Object-orie
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Defining a protocol 145 Mastering t
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Implementing a protocol 147 7.2.1 C
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Implementing a protocol 149 Listing
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Important protocols 151 iPhone UIKi
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Important protocols 153 executed. T
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Important protocols 155 Any table v
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Important protocols 157 or in table
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Important protocols 159 For s
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Important protocols 161 Listing 7.1
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Dynamic typing and runtime type inf
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Static vs. dynamic typing 165 If yo
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How messaging works 167 Messages ar
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How messaging works 169 8.3.2 Handl
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Runtime type information 171 The if
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Runtime type information 173 8.4.3
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Practical uses of runtime type intr
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Memory management This chapter cove
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Reference counting 179 Figure 9.1 A
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Reference counting 181 the object i
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Reference counting 183 Keep yoursel
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Autorelease pools 185 Ideally, you
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Autorelease pools 187 With knowledg
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Autorelease pools 189 i * 1000 + j]
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Memory zones 191 Memory zones have
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Responding to low-memory warnings 1
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Summary 199 addObserver:selector:na
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Part 3 Making maximum use of framew
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Error and exception handling This c
Page 228 and 229: NSError—handling errors the Cocoa
Page 230 and 231: Creating NSError objects 207 chapte
Page 232 and 233: Creating NSError objects 209 10.2.2
Page 234 and 235: Summary 211 10.3.2 Catching excepti
Page 236 and 237: Making your objects KVC-compliant 2
Page 238 and 239: Making your objects KVC-compliant 2
Page 240 and 241: Handling special cases 217 This que
Page 242 and 243: Filtering and matching with predica
Page 248 and 249: Sample application 225 rentingFor:2
Page 250 and 251: Summary 227 The core of the logic o
Page 252 and 253: Core Data history 229 Structured Qu
Page 254 and 255: Core Data objects 231 In Xcode you
Page 256 and 257: Core Data resources 233 careful to
Page 258 and 259: Building the PocketTasks applicatio
Page 274 and 275: Beyond the basics 251 How do you us
Page 276 and 277: Beyond the basics 253 All you do is
Page 280 and 281: Blocks and Grand Central Dispatch T
Page 282 and 283: The syntax of blocks 259 What if yo
Page 284 and 285: The syntax of blocks 261 change the
Page 286 and 287: The syntax of blocks 263 } [super d
Page 288 and 289: Performing work asynchronously 265
Page 298 and 299: Summary 275 more to learn about GCD
Page 300 and 301: Building an application, complete w
Page 302 and 303: Understanding NSLog 279 Figure 14.3
Page 304 and 305: Bringing memory leaks under control
Page 306 and 307: Bringing memory leaks under control
Page 308 and 309: Detecting zombies 285 (and the appl
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Page 312 and 313: Preparing your iOS device for devel
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Page 316 and 317: appendix B The basics of C Througho
Page 318 and 319: Variable naming conventions 295 As
Page 320 and 321: Expressions 297 Table B.3 Relationa
Page 322 and 323: Expressions 299 B.2.4 Assignment op
Page 324 and 325: Conditional statements 301 based on
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Looping statements 305 Not as strai
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Looping statements 307 One importan
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Looping statements 309 As in a do l
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Summary 311 CONTINUE The continue s
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A short history of Objective-C 313
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The iPhone SDK: Safari 315 C.2 Alte
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The iPhone SDK: Safari 317 C.3.2 ha
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The iPhone SDK: Safari 319 It’s i
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Scripting languages: Lua and Ruby 3
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Mono (.NET) 323 the iOS platform. F
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Summary 325 Xamarin announced a fol
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index Symbols ^ operator 298 - oper
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INDEX 329 application-specific quer
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INDEX 331 collections (continued) e
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INDEX 333 E e character 35 editButt
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INDEX 335 iOS Developer account 9 i
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INDEX 337 mutableCopyWithZone 190 M
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INDEX 339 Organizer window 291 over
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INDEX 341 setFlag 164 setNilValueFo
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INDEX 343 vardic method 75 variable
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