6s拍好的动态图片，如何和朋友分享？

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https://developer.apple.com/library/prerelease/ios/releasenotes/General/WhatsNewIniOS/Articles/iOS9_1.html#//apple_ref/doc/uid/TP40016572-DontLinkElementID_2

Guidelines for Displaying Live Photos
It’s important to remember that a Live Photo is still a photo. If you have to display a Live Photo in an environment that doesn’t support PHLivePhotoView, it’s recommended that you present it as a regular photo.

Don’t display the extra frames and audio of a Live Photo separately. It's important that the content of the Live Photo be presented in a consistent way that uses the same visual treatment and interaction model in all apps.

It’s recommended that you identify a photo as a Live Photo by placing the badge provided by the PHLivePhotoView class method livePhotoBadgeImageWithOptions: in the top-left corner of the photo.

Note that there is no support for providing the visual effect that users experience as they swipe through photos in the Photos app.

Guidelines for Sharing Live Photos
The data of a Live Photo is exported as a set of files in a PHAssetResource object. The set of files must be preserved as a unit when you upload them to a server. When you rebuild a PHLivePhoto with these files on the receiver side, the files are validated; loading fails if the files don’t come from the same asset.

If your app lets users apply effects or adjustments to a photo before sharing it, be sure to apply the same adjustments to all frames of the Live Photo. Alternatively, if you don’t support adjusting the entire contents of a Live Photo, share it as a regular photo and show an appropriate indication to the user.

If your app has UI for picking photos to share, you should let users play back the entire contents so they know exactly what they are sharing.When selecting photos to share in your app, users should also be able to turn a Live Photo off, so they can post it as a traditional photo.