从玩具到工具 from toy to tool
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Steve Jobs started NeXT in 1985 after leaving Apple. NeXT created the NeXTSTEP operating system which was the basis for Apple's macOS and its Cocoa APIs. Objective-C was created in the 1980s and combined with Cocoa to provide an object-oriented programming model for iOS app development. The Model-View-Controller (MVC) pattern is commonly used in iOS apps with the model, view and view controller code separated. A basic "Hello, World" iOS app is demonstrated to show how to get started with iOS development.
从玩具到工具 from toy to tool
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