NSScreencast Episode #1 Objective-C Basics

Objective-C Basics - NSScreencast

• interface (.h), implementation (.m)
• Instance Method(-), Class Method (+)
• can add line break in each argument
• objc_msgSend [recipient Message:message]
• arc (automatic reference countiing)
• [[Type alloc] init], [obj release]
• [obj retain], [obj dealloc]
• factory methods, return [label autorelease];
• Need to release? - create, retain
• Release too many times -> App will crash
• Forget to release -> Leaks memory
• format specifier % + [d f g s c @]

XCodeで修飾キーと矢印をすごい使っている

arc

[iOS5] ARC (Automatic Reference Counting) : Overview - iOS 開発ブログ Natsu's note