Perhaps the biggest advantage of using Mac OS X as your Objective-C learning platform (aside from the ability to develop iOS and Mac OS X applications) is the fact that you get to use Apple's Xcode development tool. If you are planning to develop iOS applications (or Mac OS X applications for that matter), however, you are going to need to use an Intel based Mac OS X system at some point in the future. In later chapters we will look at how to install and use Objective-C on Windows and Linux systems for those that do not have access to Mac OS X. Objective-C 2.0 Essentials Print and eBook (ePub/PDF/Kindle) editions contain 31 chapters. If they do, I truly Purchase the full edition of this Objective-C book in Print ($14.99) or eBook ($12.99) format I am not convinced that Apple actually uses Xcode internally to build their own software. We finally got a declarative UI framework (SwiftUI) after struggling through the awful experience of Interface Builder for so many years, but even with a fresh start like that the Xcode team still just can't deliver a tolerable development experience. Just Xcode things.įor every small step forward, there are a hundred steps backward. When it happened the first time, I wasn't even a little surprised. It's essential to learn the "toggle canvas" and "refresh canvas" keyboard shortcuts when building with SwiftUI or you will spend inordinate amounts of time clicking buttons just to get the "live previews" to actually update.Īnd, lastly - this isn't a joke - sometimes the IDE's controls / labels are rendered upside down, so you have to learn to read upside down. SwiftUI previews routinely fail to update. Syntax highlighting and autocompletion frequently break.ĭerived Data folder regularly needs to be cleared (which incidentally instigates a package restore again). SPM cache constantly needs to be cleared and packages restored. Some features may require Internet access. To submit your apps to the App Store you must be a member of the Apple Developer Program. To test or run applications on an iPhone, iPad, Apple TV, or Apple Watch all you need is a free Apple ID. Create custom instruments with unique visualizations to analyze your own code and frameworks.Analyze your app directly, or sample the entire system with very little overhead.Identify performance bottlenecks, then dive deep into the code to uncover the cause.Compare CPU, disk, memory, and GPU performance as graphical tracks over time.Data tips and Quick Look can inspect a variable by hovering your mouse over code while debugging.Open Quickly instantly opens any file within your project.Refactoring makes it easy to modify the structure of Swift, Objective-C, C, and C++ code.Professional editor and debugger keep your code front and center Animations are built using simple commands that describe the action you want to see.SwiftUI code is always in perfect sync with the graphical design canvas and previews.Preview SwiftUI code or UIKit interfaces in different screen sizes, orientations, and font sizes.Design canvas graphically builds UI views using the library of controls and modifyers.SwiftUI uses declarative Swift code that clearly describes your interface.SwiftUI and Interface Builder make it easy to design your interface Source control navigator and service integrations help you manage code across a team.Live issues display errors as you type, and Fix-its improve your code with just a click.Split editors in virtually unlimited ways, show previews, or choose an assistant to see related content.View debugging shows a 3D stack of all your app's UI view layers at runtime.Playgrounds are a fun way to experiment and interact with Swift code. SwiftUI is a revolutionary framework to create user interfaces with a declarative Swift syntax.Swift is an intuitive programming language that is safe, fast, and modern.Innovative tools help you create great apps Xcode includes the Xcode IDE, Swift and C/C++/Objective-C compilers, Instruments analysis tool, simulators, the latest SDKs, and hundreds of powerful features: The Xcode IDE combined with the Swift programming language make developing apps easy and fun. Xcode provides developers a unified workflow for user interface design, coding, testing, and debugging. Xcode includes everything developers need to create great applications for Mac, iPhone, iPad, Apple TV, and Apple Watch.
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