A few days after the release of iOS 11.3, Apple officially released the first developer preview of iOS 11.4, and returned to AirPlay 2, a very important function.
In iOS 11.3, Apple removed the function of AirPlay 2, but now it has returned in the new developer preview. AirPlay 2 can play the same song on two HomePods at the same time, and does not need to be in the same place as the HomePod. In addition, iOS 11.4 has added the ClassKit framework, so developers can develop some special functions specifically for students.
IOS 11.4 New Features:
Play every other space 2（ AirPlay 2 ）Features, support playing the same songs on multiple rooms and devices;
Apple TV is listed in the "home app", and also provides relevant information on iCloud;
Messages on iCloud function, which was previously available in iOS 11.3 beta, is mainly used to facilitate the storage of iMessages in iCloud, so that they can be synchronized to other devices faster and save time;
HomePod provides stereo options, but is temporarily unavailable.
IOS 11.4 may be the last major update in 11. Soon, Apple will hold WWDC 2018 from June 4 to 8, when new systems such as iOS 12 and macOS will be unveiled.
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