Browse Developer Guides

For students adding notifications to an iOS project, the Simulator can help test notification payloads and app behavior, but a simulator-injected notification does not prove that Apple Push Notification service delivered it. This guide walks through environment checks, local simulation, remote APNs testing, troubleshooting, and deciding when a real device is needed.

For photographers whose Lightroom Classic files are consuming disk space, the safe first move is to identify which files are growing before deleting anything. This guide compares previews, smart previews, originals, and catalog backups, then explains a cautious cleanup and verification workflow, including what to check before using a remote Mac.

Build a runnable Swift harness for request-signing bytes, reference vectors and tampering cases, then define what the server must do to prevent replay.

Run a Swift script against reference vectors, leading zeros, and time-step boundaries, then separate client generation from server replay prevention.

Run known-answer tests with Swift and CommonCrypto, check password byte boundaries, and define a migration contract for salts and work factors.