Xcode · Swift · iOS · macOS
Fix Xcode errors, Swift bugs & iOS problems, fast.
Step-by-step fixes for build errors, code signing, SwiftUI, App Store Connect and the bugs that come with every new iOS and macOS release.
Browse by topic
For developers
Xcode Errors
Build failures, code signing and provisioning, simulator problems, archive and upload errors.
For developers
Swift & SwiftUI
Swift and SwiftUI explained with working code: concurrency, data flow, navigation, compiler errors.
For developers
App Store & TestFlight
App Store Connect, TestFlight builds, App Review rejections and StoreKit issues.
For iPhone & iPad
iOS Fixes
Battery drain, Wi-Fi, Bluetooth, storage and app problems after iOS updates.
For Mac
macOS Fixes
macOS update problems, Finder, external drives, storage and apps that won’t open.
What’s new
Developer Updates
New Xcode, SDK and OS releases: what changed, known issues and what to update.
Latest guides
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Fix: Can’t Install a .ipa File on the iOS Simulator
An .ipa won’t run in the iOS Simulator because it’s a device build. Here’s why it fails and how to install a…
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How to Sort an Array of Custom Objects by Property in Swift
Learn why an untyped array blocks sorting and how to sort custom Swift objects by a property ascending or descending with sorted(by:)…
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Where Did Derived Data Go? Deleting It in Modern Xcode
Find and delete Xcode Derived Data using Project Settings, the Locations tab, Clean Build Folder, or Finder — plus how to stop…
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How to Dismiss the iOS Keyboard by Tapping Anywhere in Swift
Stop the iOS keyboard from covering your form. Add a tap gesture that calls endEditing, reuse it across view controllers, and handle…
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Fix: Conflicting Provisioning Settings in Xcode App Extensions
Resolve Xcode’s conflicting provisioning settings and “Code signing is required” errors by aligning signing across your app and every extension target.
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How to Pass Data Between View Controllers in Swift (Forward and Back)
Pass data forward with properties and segues, and send selections back with delegates or closures. Clear UIKit patterns with Swift code you…
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Swift String Replacement: Replace Characters the Right Way
Replace characters in a Swift String with replacingOccurrences, the iOS 16 replacing(_:with:) API, or a single-pass map. Includes first-match and regex examples.
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Undefined symbols for architecture x86_64: Link a Missing Framework
Why Xcode reports Undefined symbols for architecture x86_64 and how to fix it: link the missing framework, check target membership, and verify…
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How to Get the Length of a String in Swift (Use count)
Swift strings have no length property. Use count for visible characters, and utf16.count when you need UTF-16 offsets for NSRange or UIKit…
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How to Make an HTTP Request in Swift with URLSession
Learn how to make GET and POST HTTP requests in Swift using URLSession, async/await, JSON decoding, status-code checks, and proper error handling.
Built from real problems
Every guide starts from an actual error message, release note or issue developers and users are hitting right now.
Fix first, theory second
A quick answer at the top, then the fixes in order of what’s most likely to work, with code you can copy.
Sources you can check
We link Apple’s release notes and the original discussions, and update guides when new versions change the answer.