iOS 5 & Xcode 4: ARC, Stroryboards
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The document discusses new features in iOS 5 including Xcode 4.2, ARC support, storyboarding, and device support for iPhone 4S, iPhone 4, iPhone 3GS, iPod Touch 3G/4G, iPad and iPad 2. It provides an introduction to Automatic Reference Counting (ARC) explaining how it manages object memory and strong/weak references automatically to avoid issues like dangling pointers and memory leaks.
![Concept
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-65-320.jpg)
![Concept
myObj
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-69-320.jpg)
![Concept
myObj dangling pointer
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-71-320.jpg)
![Concept
myObj dangling pointer
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];
[myObj someMethod]; // Boom!](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-73-320.jpg)
![Concept
myObj dangling pointer
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];
[myObj someMethod]; // boom!](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-75-320.jpg)
![Concept
myObj dangling pointer
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];
[myObj someMethod]; // boom!
myObj2
MyClass *myObj2 = [[MyClass alloc] init];
[myObj2 someMethod]; // etc.
!](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-77-320.jpg)
![Concept
myObj dangling pointer
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];
[myObj someMethod]; // boom!
memory leak](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-79-320.jpg)
![Concept
MyClass *myObj = [[MyClass alloc] init];
[myObj someMethod]; // etc.
[myObj release];](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-81-320.jpg)
![MANAGE
myObj
MyClass *myObj = [[MyClass alloc] init];](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-96-320.jpg)
![MANAGE
strong references
myObj msg
MyClass *myObj = [[MyClass alloc] init];
NSString *msg = [NSString stringWithFormat:@Hello];](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-102-320.jpg)
![MANAGE
strong references
myObj msg
MyClass *myObj = [[MyClass alloc] init];
NSString *msg = [NSString stringWithFormat:@Hello];](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-108-320.jpg)
![MANAGE
strong references
myObj msg
MyClass *myObj = [[MyClass alloc] init];
NSString *msg = [NSString stringWithFormat:@Hello];
msg = nil;](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-114-320.jpg)
![MANAGE
NSString *msg = [NSString stringWithFormat:@Hello];
msg = nil;](https://image.slidesharecdn.com/ios5xcode4-builds-140924231311-phpapp02/85/iOS-5-Xcode-4-ARC-Stroryboards-120-320.jpg)
iOS 5 & Xcode 4: ARC, Stroryboards
- 1. iOS5
- 4. EungShik
- 5. Kim
- 6. WHAT’S
- 7. NEW
- 8. IN
- 9. IOS5
- 12. Xcode Tools Language Objective-C Instruments
- 13. Xcode Tools Language Objective-C Instruments Frameworks Foundation UIKit Core Data Core Location (etc)
- 14. Xcode Tools Language Objective-C Instruments Frameworks Patterns Foundation UIKit Core Data Core Location (etc) MVC Delegation Target-Action
- 15. iOS
- 16. Development
- 17. Process
- 18. testing
- 19. /
- 20. debugging
- 21. /
- 22. provisioning
- 23. /
- 24. app
- 25. submission Xcode Tools Language Objective-C Instruments Frameworks Patterns Foundation UIKit Core Data Core Location (etc) MVC Delegation Target-Action
- 26. iOS
- 27. Development
- 28. Process Tools Language Frameworks Patterns
- 29. iOS
- 30. Development
- 31. Process Tools Language Frameworks Patterns Xcode 4.2 LLVM 3.0 Compiler ARC Support Storyboarding
- 32. iOS
- 33. Development
- 34. Process Tools Language Frameworks Patterns Enhancements for ARC
- 35. iOS
- 36. Development
- 37. Process Tools Language Frameworks Patterns Twitter Newsstand Kit UIKit Foundation No Siri Support (Jan 2012)
- 38. iOS
- 39. Development
- 40. Process Tools Language Frameworks Patterns
- 41. iOS
- 42. Device
- 43. Support
- 44. iOS
- 45. Device
- 46. Support iPhone 4S iPhone 4
- 47. iOS
- 48. Device
- 49. Support iPhone 4S iPhone 4 iPhone 3GS iPod Touch 3G/4G
- 50. iOS
- 51. Device
- 52. Support iPhone 4S iPhone 4 iPhone 3GS iPod Touch 3G/4G iPad iPad 2
- 53. INTRODUCTION
- 54. TO
- 55. ARC
- 56. INTRODUCTION
- 57. TO
- 58. ARC AUTOMATIC
- 59. REFERENCE
- 60. COUNTING
- 62. ARC
- 63. Concept
- 64. ARC
- 65. Concept MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release];
- 66. ARC
- 67. Concept
- 68. ARC
- 69. Concept myObj MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release];
- 70. ARC
- 71. Concept myObj dangling pointer MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release];
- 72. ARC
- 73. Concept myObj dangling pointer MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release]; [myObj someMethod]; // Boom!
- 74. ARC
- 75. Concept myObj dangling pointer MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release]; [myObj someMethod]; // boom!
- 76. ARC
- 77. Concept myObj dangling pointer MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release]; [myObj someMethod]; // boom! myObj2 MyClass *myObj2 = [[MyClass alloc] init]; [myObj2 someMethod]; // etc. !
- 78. ARC
- 79. Concept myObj dangling pointer MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release]; [myObj someMethod]; // boom! memory leak
- 80. ARC
- 81. Concept MyClass *myObj = [[MyClass alloc] init]; [myObj someMethod]; // etc. [myObj release];
- 82. WHAT
- 83. ARC
- 84. MANAGE
- 85. WHAT
- 86. ARC
- 87. DOES
- 88. AND
- 89. DOESN’T
- 90. MANAGE
- 91. WHAT
- 92. ARC
- 93. DOES
- 94. AND
- 95. DOESN’T
- 96. MANAGE myObj MyClass *myObj = [[MyClass alloc] init];
- 97. WHAT
- 98. ARC
- 99. DOES
- 100. AND
- 101. DOESN’T
- 102. MANAGE strong references myObj msg MyClass *myObj = [[MyClass alloc] init]; NSString *msg = [NSString stringWithFormat:@Hello];
- 103. WHAT
- 104. ARC
- 105. DOES
- 106. AND
- 107. DOESN’T
- 108. MANAGE strong references myObj msg MyClass *myObj = [[MyClass alloc] init]; NSString *msg = [NSString stringWithFormat:@Hello];
- 109. WHAT
- 110. ARC
- 111. DOES
- 112. AND
- 113. DOESN’T
- 114. MANAGE strong references myObj msg MyClass *myObj = [[MyClass alloc] init]; NSString *msg = [NSString stringWithFormat:@Hello]; msg = nil;
- 115. WHAT
- 116. ARC
- 117. DOES
- 118. AND
- 119. DOESN’T
- 120. MANAGE NSString *msg = [NSString stringWithFormat:@Hello]; msg = nil;
- 121. ARC
- 122. IS
- 123. NOT
- 124. GABAGE
- 125. COLLECTION
- 126. ARC
- 127. IS
- 128. NOT
- 129. GABAGE
- 130. COLLECTION GARBAGE COLLECTION runtime requires garbage collector nondeterministic
- 131. ARC
- 132. IS
- 133. NOT
- 134. GABAGE
- 135. COLLECTION GARBAGE COLLECTION runtime requires garbage collector nondeterministic ARC compile-time no charge to runtime model predictable
- 136. THE
- 137. RULE
- 138. OF
- 139. ARC
- 140. #1:
- 141. DON’T
- 142. CALL
- 143. MEMORY
- 144. MANAGEMENT
- 145. METHOD
- 146. #1:
- 147. DON’T
- 148. CALL
- 149. MEMORY
- 150. MANAGEMENT
- 151. METHOD no retain
- 152. #1:
- 153. DON’T
- 154. CALL
- 155. MEMORY
- 156. MANAGEMENT
- 157. METHOD no retain no release no autorelease
- 158. #1:
- 159. DON’T
- 160. CALL
- 161. MEMORY
- 162. MANAGEMENT
- 163. METHOD no retain no release no autorelease no retainCount
- 164. #1:
- 165. DON’T
- 166. CALL
- 167. MEMORY
- 168. MANAGEMENT
- 169. METHOD no retain no release no autorelease no retainCount no dealloc - (void)dealloc { [imageIcon release]; [name release]; [price release]; [super dealloc]; }
- 170. #1:
- 171. DON’T
- 172. CALL
- 173. MEMORY
- 174. MANAGEMENT
- 175. METHOD no retain no release no autorelease no retainCount no dealloc
- 176. #2:
- 177. DON’T
- 178. USE
- 179. NSAUTORELEASEPOOL
- 181. #2:
- 182. DON’T
- 183. USE
- 184. NSAUTORELEASEPOOL
- 185. NSAutoReleasePool
- 186. replaced
- 187. by
- 188. @autoreleasepool
- 189. block
- 191. #2:
- 192. DON’T
- 193. USE
- 194. NSAUTORELEASEPOOL
- 195. NSAutoReleasePool
- 196. replaced
- 197. by
- 198. @autoreleasepool
- 199. block
- 200. int main(int argc, char *argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; int retVal = UIApplicationMain(argc, argv, nil, nil); [pool release]; return retVal; }
- 201. #2:
- 202. DON’T
- 203. USE
- 204. NSAUTORELEASEPOOL
- 205. NSAutoReleasePool
- 206. replaced
- 207. by
- 208. @autoreleasepool
- 209. block
- 210. int main(int argc, char *argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; int retVal = UIApplicationMain(argc, argv, nil, nil); [pool release]; return retVal; }
- 211. #2:
- 212. DON’T
- 213. USE
- 214. NSAUTORELEASEPOOL
- 215. NSAutoReleasePool
- 216. replaced
- 217. by
- 218. @autoreleasepool
- 219. block
- 220. int main(int argc, char *argv[]) { @autoreleasepool { return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); } }
- 221. #3:
- 222. NO
- 223. OBJECT
- 224. REFERENCES
- 225. IN
- 226. C
- 227. STRUCTS
- 228. #3:
- 229. NO
- 230. OBJECT
- 231. REFERENCES
- 232. IN
- 233. C
- 234. STRUCTS struct myStruct { int amount; NSString *name; };
- 235. #3:
- 236. NO
- 237. OBJECT
- 238. REFERENCES
- 239. IN
- 240. C
- 241. STRUCTS struct myStruct { int amount; NSString *name; };
- 242. #4:
- 243. NO
- 244. CASUAL
- 245. CASTING
- 246. BETWEEN
- 247. ID
- 248. AND
- 249. VOID*
- 250. #4:
- 251. NO
- 252. CASUAL
- 253. CASTING
- 254. BETWEEN
- 255. ID
- 256. AND
- 257. VOID* NSString *myString = (NSString *) myCFRef; !!! CFStringRef myNewCFRef = (CFStringRef) myObj;
- 258. #4:
- 259. NO
- 260. CASUAL
- 261. CASTING
- 262. BETWEEN
- 263. ID
- 264. AND
- 265. VOID* NSString *myString = (NSString *) myCFRef; !!! CFStringRef myNewCFRef = (CFStringRef) myObj;
- 266. #4:
- 267. NO
- 268. CASUAL
- 269. CASTING
- 270. BETWEEN
- 271. ID
- 272. AND
- 273. VOID* NSString *myString = (NSString *) myCFRef; !!! CFStringRef myNewCFRef = (CFStringRef) myObj;
- 274. #4:
- 275. NO
- 276. CASUAL
- 277. CASTING
- 278. BETWEEN
- 279. ID
- 280. AND
- 281. VOID* NSString *myString = (__bridge_transfer NSString *) myCFRef; !!! CFStringRef myNewCFRef = (__bridge_retained CFStringRef) myObj;
- 282. OTHER
- 283. RULES
- 284. OTHER
- 285. RULES no NSZone no NSAllocateObject no NSDeallocateObject
- 286. USING
- 287. WEAK
- 288. REFERENCES
- 289. OBJECT
- 290. GRAPHS
- 291. OBJECT
- 292. GRAPHS MyObjectA B C C NSString NSDate NSArray NSString NSString NSString
- 293. RETAIN
- 294. CYCLES strong references weak references
- 295. RETAIN
- 296. CYCLES Button A strong references weak references
- 297. RETAIN
- 298. CYCLES Button A B strong references weak references
- 299. RETAIN
- 300. CYCLES Button A B C strong references weak references
- 301. RETAIN
- 302. CYCLES Button A B C 1 2 1 strong references weak references
- 303. RETAIN
- 304. CYCLES Button A B C 1 2 1 strong references weak references
- 305. RETAIN
- 306. CYCLES Button A B C 1 2 1 strong references weak references
- 307. RETAIN
- 308. CYCLES A B C 1 2 1 strong references weak references
- 309. RETAIN
- 310. CYCLES A B C 2 1 strong references weak references 0
- 311. RETAIN
- 312. CYCLES B C 2 1 strong references weak references
- 313. RETAIN
- 314. CYCLES B C 1 strong references weak references 1
- 315. RETAIN
- 316. CYCLES B C 1 strong references weak references 1
- 317. WEAK
- 318. REFERENCES SomeObject *myParent = parentRef;
- 319. WEAK
- 320. REFERENCES SomeObject __weak *myParent = parentRef;
- 321. WEAK
- 322. REFERENCES SomeObject __weak *myParent = parentRef; @property (weak) IBOutlet UILabel *myLabel; ! @property (strong) NSString *myProperty;
- 323. RETAIN
- 324. CYCLES Button A B C strong references weak references
- 325. RETAIN
- 326. CYCLES Button A B C strong references weak references
- 327. RETAIN
- 328. CYCLES A B C strong references weak references
- 329. RETAIN
- 330. CYCLES B C strong references weak references
- 331. RETAIN
- 332. CYCLES C strong references weak references
- 333. RETAIN
- 334. CYCLES strong references weak references
- 335. WEAK
- 336. REFERENCES Button A B C strong references weak references
- 337. WEAK
- 338. REFERENCES Button A B C strong references weak references zeroing weak references
- 339. WEAK
- 340. REFERENCES Button A B C strong references weak references someVar zeroing weak references
- 341. WEAK
- 342. REFERENCES someVar zeroing weak references
- 343. WEAK
- 344. REFERENCES someVar nil zeroing weak references
- 345. ARC
- 346. REFERENCES
- 347. ARC
- 348. REFERENCES Transitioning to ARC Release Notes http://developer.apple.com/library/ios/#releasenotes/ObjectiveC/RN-TransitioningToARC/_ index.html
- 354. =
- 355. Common Issues While Converting a Project
- 356. ! Xcode
- 357. 4.x
- 359. Organizer
- 361. Documentation
- 363. iOS
- 364. 5.0
- 365. Library
- 367. Tools
- 369. Languages
- 371. Objective-C
- 373. Transitioning
- 374. to
- 375. ARC
- 376. Release
- 377. Notes
- 383. =
- 384. Common Issues While Converting a Project
- 385. USING
- 386. STORYBOARDS
- 387. STORYBOARDS
- 388. STORYBOARDS
- 389. ONE
- 390. STORYBOARD
- 391. PER
- 392. APP
- 393. ONE
- 394. STORYBOARD
- 395. PER
- 396. APP
- 397. ONE
- 398. STORYBOARD
- 399. PER
- 400. APP
- 401. SCENES
- 402. AND
- 403. SEGUES
- 404. SCENES
- 405. AND
- 406. SEGUES scene scene
- 407. SCENES
- 408. AND
- 409. SEGUES segue scene scene
- 410. NEW
- 411. IN
- 414. 1:
- 415. CREATE
- 416. THE
- 417. STORYBOARD
- 418. 1:
- 419. CREATE
- 420. THE
- 421. STORYBOARD
- 422. 2:
- 423. CREATE
- 424. CUSTOM
- 425. CLASS
- 426. 2:
- 427. CREATE
- 428. CUSTOM
- 429. CLASS #import Foundation/Foundation.h ! @interface Photo : NSObject ! @property (nonatomic, strong) NSString *name; @property (nonatomic, strong) NSString *filename; @property (nonatomic, strong) NSString *notes; ! @end
- 430. 3:
- 431. ADD
- 432. CUSTOM
- 433. VIEW
- 434. CONTROLLER
- 435. CLASSES
- 436. 3:
- 437. ADD
- 438. CUSTOM
- 439. VIEW
- 440. CONTROLLER
- 441. CLASSES
- 442. 4:
- 443. LOAD
- 444. THE
- 445. DATA
- 446. 4:
- 447. LOAD
- 448. THE
- 449. DATA
- 450. 5:
- 451. PASS
- 452. THE
- 453. OBJECT
- 454. BETWEEN
- 455. SCENES
- 456. 5:
- 457. PASS
- 458. THE
- 459. OBJECT
- 460. BETWEEN
- 461. SCENES photo
- 463. ADDITIONAL
- 464. FEATURES
- 465. ADDITIONAL
- 466. FEATURES
- 467. ADDITIONAL
- 468. FEATURES iCloud Newsstand Twitter Integration
- 469. ADDITIONAL
- 470. FEATURES iCloud Newsstand Twitter Integration UIStepper
- 471. ADDITIONAL
- 472. FEATURES iCloud Newsstand Twitter Integration UIStepper UIPageViewController
- 473. ADDITIONAL
- 474. FEATURES iCloud Newsstand Twitter Integration UIStepper UIPageViewController
- 475. ADDITIONAL
- 478. ADDITIONAL
- 481. ADDITIONAL
- 484. ADDITIONAL
- 487. 감사합니다.
- 488. ! @neoroman