Check out these tutorials about outlets, actions, functions, classes, and optionals: Sign up for my iOS development course, and learn how to generate revenue by publishing your apps in the App Store. Swift Package Manager (SPM) — good to know! I often call debugging with print() poor man’s debugging, because it’s free and easy. You can use them to step through the code. A notable newcomer in Xcode is SwiftUI. The outlined buttons (see screenshot) are steppers. It’s OK to debug by peppering your code with print() statements, too. Get a head start on your Mac app by selecting the “Mac” checkbox in the project settings of your existing iPad app. Xcode has a ton of other debugging tools, such as breakpoints, so don’t miss out on those! Instruments automatically show OSLog signposts you add into your code. We’re going to create a new project in Xcode. It’s Xcode 101! You can also use the on-screen soft keyboard, that you can show/hide with, You can reach most iPhone functions via the, You can simulate GPS location updates via, Then, connect your iPhone to your Mac via USB and choose, Then, in the top-left corner of Xcode, select your iPhone device, First, open Xcode, and connect your iPhone to your Mac via USB, Then, find your iPhone in the list on the left, and then click, Choose the following settings in the next dialog, then click, Finally, save the project in a convenient location, and click, This random string is then assigned to the, Drag-and-drop from the circle on its right to the, With the Swift Playgrounds app for Mac and iPad, Save the playground in a convenient location, then click, You build your app with the iOS SDK, i.e. He teaches app developers how to build their own apps at LearnAppMaking.com. With this specific panel, you can create new iPhone Simulator devices. Xcode includes documentation, and documentation tools, right within the IDE. We’ll continue this tutorial with a few smaller areas of Xcode worth pointing out. Xcode 12 builds Universal apps by default to support Mac with Apple Silicon, often without changing a single line of code. You’ll now see the Build Settings screen in Xcode, which we’ll discuss later on in this tutorial. Keep in mind that the UI element you want to connect to, and the type of the property need to be the same. Doing so is simple: Every time you update your iPhone to a new iOS version, Xcode will need to download so-called debug symbols from your iPhone. Sign up for my iOS development course, and learn how to build great iOS 14 apps with Swift 5 and Xcode 12. Xcode 10 supports running multiple concurrent versions of the Xcode app and of any associated tools such as Simulator. Swift compiler builds each individual file significantly faster. You can see this by comparing the Build Settings tab for a project, and for a target. You can code plain Swift with Xcode too. Xcode 12 includes Swift 5.3 and SDKs for iOS 14, iPadOS 14, tvOS 14, watchOS 7, and macOS Big Sur.. Universal apps. Next time your app runs, and the code hits that line, execution will halt, and you can inspect your app at that exact spot in the code! - Returns: An array of fake `Article` objects What is the minimum hardware and software specification to install XCODE 8.0 in a MAC PC or Laptop? They include settings that determine how a project is built, such as the certificate that’s used to sign an app for distribution to the App Store. Debug symbols can accumulate quite some gigabytes of storage, so if you want to remove them occasionally, check out the ~/Library/Developer/Xcode/DerivedData/ folder on your Mac. An important aspect of an Xcode project are its Build Settings. If you don’t have an iPhone or iPad, iPhone Simulator is the next best thing. I’ve tried my best to name things with their right names, but don’t think for a second that you need to say “Project Navigator” when you really want to say “file browser” or “that file thing on the left”. Let’s take a look at how Xcode helps you document your own code. The next step in this tutorial, is installing Xcode. It is easy to bring your existing iPad app to millions of Mac users. We’ve defined a function fibonacci(_:), which will return the Fibonacci number based on the index number i. Xcode is an IDE, an Integrated Development Environment, which essentially means that Xcode includes many additional tools for development. You can now use said library’s code in your own app project. If you want to focus on some Swift code, you can hide the left and right panes, for example. SwiftUI requires iOS 13, watchOS 6, tvOS 13, or macOS Catalina. ), and a Top margin of 8 to the button. Metal shader debugger lets you easily inspect the execution of your vertex, fragment, compute, and tile shader code. This will create the outlet connection. Here’s how you do that: Quick Tip: Don’t want to use the App Store app? Unsubscribe anytime. To do that simply control-click Xcode app, click Open Package Contents, then go inside Contents folder, there you'll see info.plist. The Swift code is compiled and run, and its output appears in the Console below the editor. You’ll now see something like the screenshot below. Privacy Policy, At LearnAppMaking.com, I help app developers to build and launch awesome apps. Check out this tutorial: How To Download, Install and Update Xcode. When you’re coding an app, you can expect to spend a fair chunk of time on finding and fixing bugs. It’ll also inform you about errors in your project. In the above screenshot, you can see what happens when a breakpoint is hit. Find details and step-by-step instructions on how to use Xcode. The Build Settings also include an important setting, namely the Deployment Target. Open the Main.storyboard file. Learn about the key features available in Xcode, the integrated development environment for building apps for Mac, iPhone, iPad, Apple Watch, and Apple TV. Coding a UI with code is novel and exciting, but it’s also slated to be more productive. What happens when you click the button? If you’ve got many Xcode projects, just opening them via Finder might be more productive. Amazing new preview tools let you manually type SwiftUI code, or modify the UI with rich design tools, with code and design always in sync. Place multiple cursors in your code editor to make many changes at once. A playground is essentially a Swift file, with a few helpful tools for coding. First, we’ve got 4 major areas in Xcode: Xcode’s UI also has a few other useful bits and bobs, such as: Next up in this tutorial, we’re going to look at a few parts of Xcode in more detail…. You can create a Simulator that simulates that specific device, including a specific iOS version. So, I have been thinking about getting into app development lately. Xcode 11 includes SwiftUI, a new Swift framework and accompanying design tools that empower a whole new way to build user interfaces. slow but steady growth. Here, copy-and-paste the following snippet into the editor: Then, click the Play button at the bottom-left of the editor. Let’s look at a few of these tools one by one. Take a look at the above screenshot. This function returns an array of fake articles. This table shows which platforms can be built with differentdevelopment tool & operating system combinations: ^ Other platformsare also available. For example, $(PRODUCT_NAME) is a string that’s called Product Name in the Build Settings, which in turn usually contains the name of your app. Let’s build something first. Xcode 10.2.1 fixes a build time issue in large Swift projects, and includes additional bug fixes. Interface Builder might seem daunting at first, but it’s a simple program considering how powerful it is. First, make sure you’ve started Xcode, and then do this: Great! We’ve got plenty of tutorials about both: Let’s take a look at Xcode! AppCode is available on macOS only since it cannot run without Xcode. If you want to install Xcode on your Windows PC (7, 8.1 and 10), then you have landed exactly on the right page. In this case, that’s UILabel. You can create constraints with these buttons, most notably, First, make sure to open your iOS project in Xcode, Then, in the top-left corner of Xcode, select the Simulator you want to use, You can do a two-finger pinch by holding the, You can use your Mac’s keyboard to input text into text fields. You can use the mouse to interact with your app, but there’s a few things you should know: iPhone Simulator has a few useful features, including: Let’s move on, and figure out how you can run your app on an actual iPhone! Do you think that Xcode 10 will be supported on High Sierra (which my Mac can run) or should I invest in a newer Mac? It’s a simulator, not an emulator, so there are slight differences, such as performance, timing and architecture (i386 vs. You’ve got 7 of ’em: You could separate these 7 inspectors into 2 groups, namely: In the above screenshot, you also see a few miscellaneous items: Let’s move on to a more hands-on part of this tutorial, namely, how to run your own apps on your iPhone and in iPhone Simulator! You can reach both via the Window menu in Xcode. You create storyboards, connect them with view controllers, and that forms the basis of your app’s User Interface. You’re seeing 2 libraries that have been included with Swift Package Manager. Let’s move onto more serious matters in this tutorial: debugging. * It also includes a unified macOS SDK that includes all the frameworks, compilers, debuggers, and other tools you need to build apps that run natively on Apple Silicon and the Intel x86_64 CPU. Ask questions and discuss development topics with Apple engineers and other developers. Interface Builder used to be a separate app that you’d run next to Xcode, and I now regard it as a separate app within Xcode. It’s the new way to build UIs – and it changes how we think about building User Interfaces for iOS apps. More than you ever wanted to know™ All downloads are hosted by Apple. You can clearly see that we’re on version 5.5.2 of SDWebImage, and that we want to upgrade automatically to new versions up to the next major versions. First, make sure you’ve started Xcode on your Mac. Xcode 9has a minimum system requirement of macOS 10.12.6 or above (Sierra) but ideally you should be running macOS High Sierra (10.13 or above). At a glance, you’ll see: Changes not yet pushed to the shared repository. In short, Swift Package Manager lets you add 3rd-party frameworks and libraries to your Xcode project. Xcode 10 looks amazing in combination with Dark Mode in macOS Mojave, and makes it easy for you to adopt the new look in your macOS apps as well. When a breakpoint is hit, you can use the steppers to step in, step over or step out of the code. Moreover, SwiftUI integrates well with existing UIKit-based views and libraries, which means that UIKit-based views remain relevant for considerable time. Get iOS/Swift tutorials and insights in your inbox, every Monday. Test it on a real iPhone too. A project can include multiple targets. latest version of Xcode that your Mac can run, by cross-referencing the min macOS to run in this wiki with Hardware compatibility in this wiki. The first one is the Organizer, and it’s cousin Devices & Simulators. On top of the Debug Area you see a bunch of buttons. The Xcode app itself can be extended with plugins, called Xcode Source Extensions, and many developers have taken the opportunity to add useful features to Xcode. In the above screenshot, I’ve used the po command to print out the value of article.title. Check out this tutorial: Getting Started With Debugging In Xcode. On top of that, Xcode will store SDKs, debug symbols, “derived data”, iPhone Simulator files, and more. Before committing to buying a new Mac, you can actually “rent” one for development. You’re now ready to run your app. Next up, breakpoints. All you need is an Apple ID! The breadcrumb, or, At the top of the left view controller, you see a, At the bottom left of Interface Builder, you see, Speaking of responsive – at the bottom right of Interface Builder, in the corner of the editor, you see a few buttons. Make sure to add it inside the ViewController class, so within its squiggly brackets { }. Are you familiar with constraints already? It’s an iPhone that you can run on your Mac, right from within Xcode. Conflicts you should address before committing. A Mac with macOS 11 (Big Sur) 4 GB RAM, but 8+ GB is more comfy At least 8 GB of free storage space† A 2013-2015 or newer Mac, MacBook, iMac or Mac mini I am currently using an iMac 2009 21.5" which won't be supported for Mojave. We’re going to add an outlet and an action to this view controller. Over-scroll makes it easy to center the last lines of code in the middle of your screen. Browse the latest documentation including API reference, articles, and sample code. Debugging symbols are downloaded from a new device five times faster than before. You make your own damn rules. Xcode 11 includes Swift 5.1 and SDKs for iOS 13, tvOS 13, watchOS 6, and macOS Catalina 10.15. You just add a library to your project, by providing a GitHub URL. At the top of the class, inside the first opening squiggly bracket {, add the following code: This is an outlet property. For detailed information on updates in the latest released versions, including each beta release, see the Xcode Release Notes. Go to the Swift Sandbox. Wait for Xcode to complete installing, which may take a while! Note the two items – the outlet and the action – in the Connections Inspector, textLabel and onButtonTap. These symbols are needed to symbolicate crash reports. Here’s what we discussed: Want to learn more? Xcode 10 can coexist with previous versions of Xcode. First, switch to Main.storyboard in Xcode. This is called the, The minimum iOS version someone needs to install your app is called the, Why the distinction between the two? This is quite useful if you’re looking for a general direction, and not for a specific class or function. Use the screenshot below to check your work. Sign up for my iOS development course, and learn how to start your career as a professional iOS developer. You shouldn’t update major versions without planning the upgrade carefully, because major version changes include breaking changes. Awesome! See the latest in Apple technologies presented at WWDC and other events. We’re going to add a label to this “VC”. Want to learn more? You’re now presented with an empty Swift file, with some default code. Xcode 12 is built as a Universal app that runs 100% natively on Intel-based CPUs and Apple Silicon for great performance and a snappy interface. NOTE: Xcode 12.2 adds support for macOS Big Sur and Universal apps. We’ve already seen the Quick Help Inspector in this tutorial, but there’s more! We’re now going to add a button to the view controller. You’ll remotely access the Mac and Xcode through your PC.It’ll be like having the Mac desktop in a window on your Windows Desktop.The really nice thing about this option is that the cost is really low and it’s the fastest option to get up and running.If you decide that app development isn’t for you, you just cancel your plan.1. It’ll show us the exact values of variables at the breakpoint in the code. Swift Package Manager uses a principle called semantic versioning. In one sense, it is mostly a text editor - a text editor that recompiles the file you are editing with each keystroke. The next step in this tutorial is writing some Swift code. It uses recusion; the function calls itself to return the right result. This tutorial explains exactly how to do that. If you’ve never used your iPhone with Xcode before, you’ll need to enable it for development. Until SwiftUI takes over Storyboard-based UIs, it’s important to learn to work with view controllers and storyboards, as well as with SwiftUI. It’ll calculate previous Fibonacci numbers for every iteration of the for loop (“backwards”), even though those numbers don’t change between iterations. Install AppCode. What tools does Xcode have to make debugging easier? You can also connect sensors, LEGO and drones to the app, and use them to play and code. At this point, we could distribute the 1.0 version of that app to the App Store by clicking the Distribute App button. New build system enabled by default with improved performance throughout. You use Swift programming, and the many tools inside Xcode, to build applications for iPhone, iPad, Mac, Apple TV, and more. Xcode is the Mac app that you use to build apps for iOS, macOS, tvOS and watchOS. Pfew! Unlike CocoaPods, Carthage is decentralized and won’t change your Xcode projects automatically. You can reach a project’s Build Settings by clicking on the project’s name at the top of the Project Navigator in Xcode. Here’s how you can add it to Xcode: Easy-peasy, right? That’s where semantic versioning comes in. Learn how in my free 7-day course, No spam, ever. Basic Swift programming understanding. How do you avoid upgrading to a library version that’s incompatible with your project, for example, if they’ve made breaking changes? SwiftUI is an innovative new user interface framework with a declarative Swift syntax that is easy to read, and natural to write. Xcode will spawn a collection of identical Simulators to take advantage of your multi-core Mac, and fan tests out to run in parallel, completing your test suite many times faster. It’s more like a “rule” for determining which versions of a library you want to include in your project. Life’s too short for matching socks! You’ve now set a breakpoint on that line. Let’s take a look at a few aspects of the Build Settings for a target. You see those same variables in the code. A Mac with macOS Catalina (10.15.2) for Xcode 11.5 or macOS Mojave (10.14.4) for Xcode 11.0 (see alternatives for PC here) At least an Intel i5- or i7-equivalent CPU, so about 2.0 GHz should be enough At least 8 GB of RAM, but 16 GB lets you run more apps at the same time At least 256 GB disk storage, although 512 GB is more comfortable In this course you will learn how to use SwiftUI 2 for more than just playing with small prototypes. You can archive apps for distribution, like this: In the above screenshot, you see the Devices & Simulators panel. Neat-o! You’ve got a few of them: It’s worth noting here that the majority of your work, when building an app, takes place in the General, Signing and Build Settings tabs. Introducing Xcode 12. Xcode is constantly running your real app interface live to see how it behaves directly in the design canvas, or you can instantly preview your app on an attached device. I suppose the minimum requirement for the xcode is 2GB of RAM and at-least 10 to 15 GB of storage to just run the xcode. you can type commands and send those to the iPhone/Simulator. †: Xcode takes up a lot of storage, but the basic install is 8 GB. You can code anything you want in this file. Imagine, for example, that you want to test your app specifically on the older iPhone 4S device. This tutorial is chock-full of jargon and specific words for specific things in Xcode. Learn more ». (The property is an optional, which is an important concept in Swift.). It’s perfect for doodling around with some Swift code, or practicing with syntax, or writing a simple algorithm. That’s super helpful for testing and debugging specific iOS versions and device models. I’m personally not a fan of “Hello, world!” — so pick a text that you like. The update is backwards compatible! There’s a whole ecosystem around building iOS apps, with plenty of 3rd-party tools. Here’s how: Next, reposition the label so it’s centered right below the label. Home » Blog » App Development » How To: Xcode 12 Tutorial for Beginners, Written by Reinder de Vries on November 26 2020 in App Development, iOS, SwiftUI. Xcode 12.2 beta includes SDKs for iOS 14.2, iPadOS 14.2, tvOS 14.2, watchOS 7.1, and macOS Big Sur 11. Up to this point, you’d create a Storyboard-based view controller to show anything on screen in your iOS app. Running your app on an iPhone is done in the same way as launching it on iPhone Simulator, essentially. You’ll get a tour around Xcode, so you can get up to speed with Swift programming and iOS app development. You complete all sorts of challenges, learning about functions, loops, conditionals, and more. Reinder de Vries is a professional iOS developer. Hardware → Erase All Content and Settings…, /** What if you don’t want to build an app? What’s going on in that onButtonTap() function? Copy-and-paste the URL from GitHub into the search field, then click, We’ve played around with Swift and playgrounds. With SwiftUI, you can declare the User Interfaces (UIs) of your iOS apps, and their behavior. Xcode won’t run on iPad. Code Swift right in your browser! Particularly learning game development through SpriteKit. Where do they come from? It’s easiest to download and install Xcode via the Mac App Store. As its name implies, you use Interface Builder to create User Interfaces for your apps. That said, you can generally upgrade patch versions without thinking about it. You can search, install and update apps – from the Mac App Store – via the Terminal command line! Building real apps is always the most efficient way to quickly learn new software engineering concepts. When you hold the Option key and click on a function, it’ll show a popout window with the available documentation for that function. Double-click the button and change it’s title to something like “OK!”. We’re going to bring the label and button to life, so to speak. Code folding ribbon can now hide any code block surrounded by braces. Interface Builder opens, once again. AppCode is an IDE for iOS/macOS developers, based on the IntelliJ IDEA platform.. System requirements. Every update of Xcode brings improvements, new features, bug fixes, and access to the latest SDKs. Build and share your own custom instruments package to provide unique data visualization and analysis for your own code. You can designate a property with the @IBOutlet keyword to make it an outlet. We’ve come a long way exploring Xcode in this tutorial. A few examples are: a debugger, source control, device management, iPhone Simulator, profiling tools, Interface Builder, documentation, and much more. Let’s get to it! First, make sure to select the iPhone Simulator in the top-left of Xcode, and then click the Run button or press Command + R. Your app launches on iPhone Simulator. Metal dependency viewer provides a detailed graph of how resources are used in your Metal-based app. Xcode 9.2 includes Swift 4 and SDKs for iOS 11.2, watchOS 4.2, tvOS 11.2, and macOS High Sierra 10.13. Die Programmiersprachen C, C++ können aber auch verwendet werden. You’ll need to take some steps prior, but after that, here’s how you launch your app: Before you can use your iPhone to debug your app, you’ll need to create a free Apple Developer account. Xcode 10 system requirements. The same is true for minor version changes, although you want to test your integration to be sure. Here’s what you do: Next, we’re going to do the same thing for the action. Also, add the function below the viewDidLoad() function, but not within it. 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