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
-
Fix: No iOS Distribution Signing Certificate Found in Xcode
Resolve the ‘No iOS Distribution signing certificate with a private key was found’ error in Xcode when archiving or manually signing an…
-
Fix: Unable to Boot the Simulator Error in Xcode
Resolve the ‘Unable to boot the Simulator’ error in Xcode and Flutter by clearing Developer caches, resetting CoreSimulator, and managing device state.
-
How to Set Custom Line Spacing on UILabel in UIKit
Learn how to reduce or increase line spacing in UILabel using NSAttributedString, NSMutableParagraphStyle, or Interface Builder in Swift.
-
How to Safely Clear DerivedData in Xcode
Learn how to safely delete the Xcode DerivedData folder to reclaim gigabytes of disk space and fix stubborn build or indexing issues…
-
How to Make a VStack Fill the Screen Width in SwiftUI
Learn how to expand a SwiftUI VStack to fill the full width of the screen using frame modifiers, containerRelativeFrame, and flexible child…
-
Fix: iPhone is Busy Preparing Debugger Support in Xcode
Resolve the ‘iPhone is busy: Preparing debugger support’ hang in Xcode. Step-by-step solutions to unpair, reset device caches, and restore debugging.
-
Fix: No Podfile Found in Project Directory in CocoaPods
Resolve the CocoaPods ‘No Podfile found in the project directory’ error when running pod install. Step-by-step setup for iOS, Flutter, and React…
-
Fix: UINavigationBar Background Color Not Changing in Swift
Fix navigation bar background color issues in Swift and UIKit using UINavigationBarAppearance with standardAppearance and scrollEdgeAppearance.
-
Fix: Swipe to Delete Not Showing on UITableViewCell in Swift
Fix swipe to delete not appearing on UITableViewCell in Swift. Learn the required UITableViewDataSource methods and modern UIContextualAction fixes.
-
Fix: Codesign Wants to Access Key in Keychain Loop in Xcode
Stop Xcode from repeatedly asking for your keychain password during code signing. Learn why codesign loops and how to grant persistent access.
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.