情报来源：
https://i.imgur.com/MOC31jJ.jpg
iOS & iPadOS 13.4 Beta 3 Release Notes：
https://apple.co/3c9dALK
General
Known Issues
-To install iOS 13.4 beta 3 using the Restore Image, first install Xcode 11.4 beta 2.
Resolved Issues
-Fixed an issue that could cause the Settings app to quit unexpectedly after a user viewed specific app settings and then returned to the main Settings page. (59124369)
Keyboard
New Features
-QuickType Keyboard now supports predictive input for Arabic.
-QuickType Keyboard now supports Live Conversion for
Japanese and Chinese (Zhuyin).
-QuickType Keyboard now supports Swiss German layout for 12.9 iPad layout.
Resolved Issues
-12.9 iPad layouts for several languages now match the hardware keyboard layouts accurately.
Location Services
New Features
-When an app requests Always authorization for the first time after having previously been authorized for While Using the App, the device immediately presents the location authorization prompt. (57106235)
Photos
New Features
-New keyboard shortcuts are available in Photos on iPadOS, which allow you to quickly navigate between tabs, search, and create albums. While in full screen mode, you can also delete, duplicate, and enter Edit mode using a keyboard. (57195967)
Resolved Issues
-Fixed an issue where Photos might not sync as expected to Apple Watch. (59324590)
SwiftUI
New Features
-When using a NavigationView with multiple columns, the navigation bar now shows a control to toggle the columns. (49074511)
-The onDrag and onDrop modifiers are now available on iOS. (49661347)
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第三版来了，
正式版推出前，应该也是传言中新指纹机的面世时间。
上一版 beta 2 稳吗？