Objective-C資料類型可以分為:基礎資料型別 (Elementary Data Type)、物件類型和id類型。基礎資料型別 (Elementary Data Type)有:int、float、double和char類型。物件類型就是類或協議所聲明的指標類型,例如:NSAutoreleasePool * pool,其中NSAutoreleasePool是一個類,NSAutoreleasePool *是它指標類型。id類型可以表示任何類型,一般只是表示物件類型,不表示基礎資料型別
EGOCache簡介EGOCache is a simple, thread-safe key value cache store. It has native support for NSString, UI/NSImage, and NSData, but can store anything that implements <NSCoding>. All cached items expire after the timeout, which by default, is
目錄About Objective-C EssentialsWhy are you reading this?Supported PlatformsThe History of Objective-CThe C Programming LanguageThe Smalltalk programming LanguageC meets SmalltalkObjective-C and AppleInstalling Xcode and Compiling Objective-C on Mac
In addition to using Objective-C on a Mac system, it is also possible to download and install the GNUstep and Objective-C environments for Microsoft's Windows family of operating systems. In this chapter we will explore the steps involved in
The basics of Objective-C are supported by the GNU compiler collection. In order to utilize the full power of Objective-C together with the Cocoa /openStep environments on Linux, and to work with many of the examples covered in this book, it is