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: `Timer` Call Produces a Type Error in Swift
Learn why a Swift Timer call fails, how to schedule repeating or one-shot timers, stop them safely, and avoid selector and retain-cycle…
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How to Create an IPA File in Xcode
Archive your iOS app, export a signed IPA from Xcode Organizer, and choose the right signing method to install it on a…
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Fix: Text Alignment in SwiftUI
Learn how to align SwiftUI text left, center, or right, and when to use multilineTextAlignment versus frame alignment for the layout you…
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Fix: String-to-Double Conversion Fails in Swift
Learn how to convert a Swift String to Double safely, reject invalid input, and parse decimal or currency text using the right…
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Fix: UITextField Text Change Event Reads Old Text in Swift
Use UIKit’s .editingChanged event to read the updated UITextField value, recalculate dependent fields, and avoid stale text in shouldChangeCharactersInRange.
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Fix: `UITapGestureRecognizer` Won’t Fire Programmatically
Stop calling nonexistent UIView event APIs: attach a UITapGestureRecognizer correctly, invoke shared tap logic in unit tests, or tap the view in…
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Fix: `library not found for -lGoogleAdMobAds` in Xcode
Fix `library not found for -lGoogleAdMobAds` by opening the CocoaPods workspace, removing stale linker entries, and checking valid library search paths.
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Fix: Convert an ISO 8601 String to `Date` in Swift
Parse an ISO 8601 timestamp like `2016-04-14T10:44:00+0000` into Swift `Date`, handle its UTC offset, and safely extract the year, month, day, and…
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Fix: UITextView Does Not Grow to Fit Its Text in UIKit
Learn how to make a UIKit UITextView grow with its text using sizeThatFits and a height constraint, including setup, editing updates, and…
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Fix: “Signing for target requires a development team” in Xcode
Resolve Xcode’s development-team signing error: add your Apple ID, choose a team, enable automatic signing, and check bundle IDs and device trust.
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.