Swift Objct Cocoa iOS开发经典书籍 pdf

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Getting Started

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Basic Setup

Swift is designed to provide seamless compatibility with Cocoa and

Objective-C. You can use Objective-C APIs (ranging from system

frameworks to your own custom code) in Swift, and you can use Swift

APIs in Objective-C. This compatibility makes Swift an easy,

convenient, and powerful tool to integrate into your Cocoa app

Objective-C and to take advantage of familiar Cocoa

classes, patterns, and practices when writing Swift code.

Mix and match allows you to create mixed-language apps

containing both Swift and Objective-C files that can

communicate with each other.

Migration from existing Objective-C code to Swift is made

easy with interoperability and mix and match, making it

possible to replace parts of your Objective-C apps with the

latest Swift features.

basic understanding of how to set up a Swift environment in which

you can access Cocoa system frameworks.

your template of choice.

2. Click the Language pop-up menu and choose Swift.

A Swift project’s structure is nearly identical to an Objective-C

project, with one important distinction: Swift has no header files.

There is no explicit delineation between the implementation and the

interface, so all the information about a particular class resides in a

single .swift file.