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Apparently, Apple's developers aren't messing around. On Monday, we had the arrival of the third beta of the upcoming operating systems iOS 11.1, watchOS 4.1 or tvOS 11.1, and today we have another version. It's been about an hour since Apple released the fourth developer version, but this time only for iOS and watchOS. A version for tvOS could arrive later.

As always, so soon after the release, it is not clear what new Apple has prepared for this release. It can be expected that some bugs will be fixed and some functionality will be added. We'll let you know as soon as information about what's new in this fourth beta hits the web. If you have a developer account and a current beta profile installed, you can download the fourth beta using the classic OTA method. You can see the official changelog (in English) below.

Notes and Known Issues

Arkite

Known Issues

  • ContinuingfromabreakpointwhiledebugginganARSessionmayresultinVIObreaking. Any visual objects placed in the world/anchor are not visible. (31561202)

Audio

Resolved Issues

  • Fixed an occasionally occurring issue with audio latency or distortion on iPad Pro (12.9-inch) (2nd generation) and iPad Pro (10.5-inch). (33844393)

AVFoundation

Resolved Issues

  • Still capture requests using the 720p30 video format with the depthDataDeliveryEnabled property of AVCapturePhotoSettings set to true now works correctly. (32060882)
  • Depthvaluesinthenondefault160x120and160x90depthdataformatsnowreturnthecorrectvalues. (32363942)

Known Issues

  • When using the TrueDepth front-facing camera on iPhone X, setting the capture device's activeFormat to a binned video format (see AVCaptureDeviceFormat isVideoBinned) for capture and enabling delivery of camera calibration data causes the resulting AVCameraCalibrationData to contain invalid information for the intrinsicMatrix property. (34200225)
  • Workaround: Select an alternate capture format whose isVideoBinned property is false.
  • Note: Configuring a capture session using a session preset never selects binned formats.

Certificates

Resolved Issues

  • Client certificate-based authentication now works for servers using TLS 1.0 and 1.1. (33948230)

EventKit

Known Issues

  • Initializing an EKCalendarChooser from EventKit can result in an app crash. (34608102)
  • Storing data to a nondefault event store in EventKit may not work. (31335830)

FileProvider

Resolved Issues

  • Apps with a deployment target earlier than iOS 11 that subclass NSFileProviderExtension now work on versions of iOS prior to iOS 11. (34176623)

Foundation

Resolved Issues

  • NSURLSession and NSURLConnection now load URLs correctly when the system is configured with certain PAC files. (32883776) Known Issues
  • Clients of NSURLSessionStreamTask that use a non-secure connection fail to connect when an error occurs during PAC file evaluation and the system is configured for either Web Proxy Auto Discovery (WPAD) or Proxy Automatic Configuration (PAC). A PAC evaluation failure can occur when the PAC file contains invalid JavaScript or the HTTP host serving the PAC file is unreachable. (33609198)
  • Workaround: Use startSecureConnection to establish a secure connection.

Location Services

Resolved Issues

  • Data from an external GPS accessory is now accurately reported. (34324743)

Notifications

Resolved Issues

  • Silent push notifications are processed more frequently. (33278611)

ReplayKit

Known Issues

  • For a broadcast extension that a user starts from within an app, the value for the RPVideoSampleOrientationKey of the CMSampleBufferRef of type RPSampleBufferType is always portrait. Starting the broadcast extension from the Control Center returns the correct value. (34559925)

Safari

Resolved Issues

  • Loading of webmail clients now behaves correctly. (34826998)

Vision

Known Issues

  • VNFaceLandmarkRegion2D is currently unavailable in Swift. (33191123)
  • Facial landmarks identified by the Vision framework may flicker in temporal use cases such as video. (32406440)

W

Resolved Issues

  • JavaScript execution during WKNavigationDelegate policy decisions now works correctly. (34857459)

Xcode

Known Issues

  • Debugging a disabled Messages extension may cause the Messages app to crash. (33657938)

  • Workaround: Enable the extension before starting the debug session.

  • After a simulated iOS device starts up, it is not possible to pull down the Lock screen. (33274699)

  • Workaround: Lock and unlock the simulated device and then reopen the Home screen.

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