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This document discusses Automatic Reference Counting (ARC) in iOS. It explains how ARC manages memory by automatically retaining and releasing objects, eliminating the need for manual memory management. Key points covered include how ARC handles strong and weak references, transitioning between non-ARC and ARC code, and some tips for using ARC in practice.Read less
Xcode 4.3.2 ã® LLVM 3.1 コンパイラ㮠ARC 最é©åŒ–ãƒã‚°ã‚’è¸ã‚“ã§ã—ã¾ã£ãŸ - むらã‹ã¿ã®é›‘記帳
Apple LLVM3.1 Compiler ã® -O1 以上ã®æœ€é©åŒ–ã‚’ã‹ã‘ã¦ã‚³ãƒ³ãƒ‘イルã™ã‚‹ã¨ã€ARC ã®ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã‚«ã‚¦ãƒ³ãƒˆãŒãŠã‹ã—ããªã£ã¦ã‚¯ãƒ©ãƒƒã‚·ãƒ¥ã™ã‚‹ç¾è±¡ãŒç™ºè¦šã€‚(CashFlow ã¯ã“ã‚ŒãŒåŽŸå› ã§ã‚¯ãƒ©ãƒƒã‚·ãƒ¥ã—ã¦ã¾ã—ãŸ) 以下ã®ã‚³ãƒ¼ãƒ‰ã§å®Œå…¨ã«å†ç¾ã—ã¾ã™ã€‚ UIButton *b, *b1, *b2; for (int i = 0; i < 2; i++) { b = [UIButton buttonWithType:UIButtonTypeRoundedRect]; if (i == 0) { b1 = b; } else { b2 = b; } } b = nil; int rc1 = CFGetRetainCount((__bridge void *)b1); int rc2 = CFGetRetainCount((__bridge void *)b2); rc1, rc2 ã«ã¯ã
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