Use PHLivePhotoView for preview in livephoto sandbox

[banjun]

Happy WWDC 2016! 🎉

@available(OSX 10.12, *)
public class PHLivePhotoView : NSView

Try using PHLivePhotoView if it can be used without saving PHLivePhoto.

Other topics I confirmed at WWDC...

• there is no API for creating Live Photos from any arbitrary JPEG and MOV.
• only way to generate Live Photos without iOS Device is to manipulate maker metadata with paired UUID (currently LoveLiver do so).
• there is no public UTI, MIME type, nor single serialized livephoto file format for sharing.
• currently server can check whether any pair of image and movie is a live photo, only by checking UUIDs in maker metadata contained in the files.

As a reminder...

Screenshots of beta apple softwares cannot be published.

[banjun]

close the one year old issue due to lack of availability of PHLivePhotoView in macOS.

In macOS, Live Photo objects are available only when editing Live Photo content in a photo editing extension that runs in the Photos app

https://developer.apple.com/documentation/photosui/phlivephotoview

for the other part of the issue, we should migrate to HEIF live photo.