// 27 articles available
App Store Connect now takes iPhone Duo screenshots, with separate sizes for the inner and outer displays. Here are the exact dimensions, how to capture them in the simulator, and when Apple starts requiring them.
Apple is running two Xcode betas at once. Xcode 27.1 beta has the iPhone Duo SDK and simulator, while Xcode 27.2 beta has the 27.2 SDKs and new tooling. Here's what's in each, the known issues to watch for, and how to keep both installed.
Apps built with the iOS 27 SDK must declare a launch screen in Info.plist, and App Store Connect rejects uploads that don't with ITMS-90870. Here's why the error appears and three ways to fix it.
Xcode 27.2 introduces a JSON-based project configuration format that replaces the decades-old pbxproj property list. Here's what changed, why it matters for diffs and merge conflicts, and how to convert an existing project.
An app that ran fine for years suddenly hangs on the splash screen when you debug it on an iOS 27 device, with an OS_dispatch_mach_msg unrecognized selector in the console. Here is what causes it and the one-line fix.
Xcode 27 can export its seven agent skills (SwiftUI, testing, security). Here's how to export them and load them in Claude Code, Codex, or Cursor.
Xcode 27's minimum deployment target is iOS 15.0. Fix the IPHONEOS_DEPLOYMENT_TARGET "supported range is 15.0 to 27.0" error in your app and pods.
React Native build failing on Xcode 26.4 with a fmt consteval error? Build only the fmt pod as C++17 with this short Podfile fix.
Xcode eats storage through DerivedData, old simulators, device support files, and archives. Here's what each folder is and what is safe to delete.
Swift Testing replaces XCTest with a cleaner macro-based API. Learn how to write tests with @Test, #expect, parameterized inputs, and traits in Xcode 16+.
Swift macros generate code at compile time, reducing boilerplate and catching errors early. Learn how to use built-in macros and understand how custom macros work.
The Xcode MCP server connection prompt interrupts your flow every time you restart Claude Code or clear your session. Here's how to automate it away using hooks.
Learn how to test push notifications on iOS simulators without needing a device or server setup using xcrun simctl push.
Preview Live Activity views right in Xcode without launching the app. Use the #Preview macro with content states to iterate on your UI fast.
When SwiftUI previews break, the error messages aren't always helpful. Here's how to debug them, clear caches, and get back to a working state.
Xcode 26.3 ships with a built-in MCP server that exposes project structure, build actions, and test results to external AI tools. Here's how to set it up.
Fix Xcode's No such module error: check the target's linked frameworks, open the .xcworkspace, reset package caches, and match the build configuration.
Learn how to use Xcode's Device Conditions feature to simulate thermal state and network conditions to test your app under real-world stress scenarios.
When the iOS Simulator refuses to launch, gets stuck booting, or shows a black screen, here's how to diagnose and fix it.
When Xcode's indexing gets stuck or takes forever, your autocomplete and jump-to-definition stop working. Here's how to get it unstuck.
When SwiftUI previews fail with cryptic errors or just spin forever, here's how to diagnose and fix the most common causes.
When building UIs that stream AI-generated content using Apple's Foundation Models framework, testing intermediate states in Xcode Previews requires some creative workarounds. Here's how to preview partially generated content without calling the actual model.
Learn how to symbolicate crash logs from App Store Connect and Xcode Cloud to debug production crashes effectively.
Find any SF Symbol by name without leaving Xcode, using the Library panel search and a few shortcuts.
Learn how to fix the Firebase Crashlytics dSYM files not properly being uploaded to Firebase after upgrading to Xcode 15/16.
Learn how to detect if a SwiftUI app is running in a Xcode Preview.
Seeing pod install fail with Unknown ISA PBXFileSystemSynchronizedRootGroup? Xcode 16's folder-based groups are the cause. Here's the quick fix.