问题
I have an iOS 8 share extension for posting content from a web browser. Users need to be prompted to login if they've never logged in via the containing app.
Pinterest appears to support fast-switching to the containing app (I'm assuming they've implemented a share extension).
iOS documentation suggests that only Today extensions can open containing apps.
Is there a way to fast-switch to the containing app via a share extension for authentication?
来源：https://stackoverflow.com/questions/26188931/ios-8-share-extension-and-authentication-flows