问题
I was reading this documentation on how to preview a file on my iOS app.
https://developer.apple.com/library/ios/documentation/FileManagement/Conceptual/DocumentInteraction_TopicsForIOS/Articles/PreviewingandOpeningItems.html#//apple_ref/doc/uid/TP40010410-SW1
Is there any to detect which app did the user choose? Or any way to kno if he actually tapped on any option?
My problem: iBooks large file (> 700mb). User chooses preview, then taps on the top right corner and chooses to open on iBooks. It takes between 20 to 45 seconds until it jumps to iBooks. If I know that the user tapped any app I could at least show a loading or whatever so he knows something is about to happen.
回答1:
You can use UIDocumentInteractionControllerDelegate methods to achieve this. Here are the list of methods:
Apple document link
来源：https://stackoverflow.com/questions/30298405/detect-when-user-opens-file-in-app