Update your apps to use new features, and test your apps against API changes.
Overview
The iOS & iPadOS 13.3 SDK provides support for developing apps for iPhone, iPad, and iPod touch devices running iOS & iPadOS 13.3. The SDK comes bundled with Xcode 11.3 available from the Mac App Store. For information on the compatibility requirements for Xcode 11.3, see Xcode 11.3 Release Notes.
Networking
New Features
Certain top-level domains (TLDs) such as
.devand.appare now in the FoundationNSURLSessionandNSURLConnectionHTTP Strict Transport Security (HSTS) preload list. An app which usesNSURLSessionto visit a matching URL will always navigate to the URL ashttps://, and never as cleartexthttp://. See the HTTP Strict Transport Security (HSTS) Specification for more information about HSTS. (56247242)
Safari
New Features
Now supports NFC, USB, and Lightning FIDO2-compliant security keys in Safari,
SFSafari, andView Controller ASWebusing the WebAuthn standard, on devices with the necessary hardware capabilities.Authentication Session