As per the documentation, both UIDocumentPickerViewController and UIDocumentBrowserViewController can be used for importing documents outside an apps sandbox.
For selecting & importing a document from local document providers/cloud locations, which one for the above is best suited.Can i still use UIDocumentPickerViewController in iOS 11 ?
As per the following documentation Apple documentation for document picker , Before your app can use the document picker, you must turn on the iCloud Documents capabilities in Xcode and an iCloud container should be mapped to the appId.Is this mandatory if i'm only doing import operation ? I have tried using UIDocumentPickerViewController and it seems to be returning selected file path correctly even without the above mentioned entitlements.
You do not need the entitlement if you do not need your own iCloud container. If you just want to import files, you can use UIDocumentPickerViewController without adding an entitlement.
Yes, UIDocumentPickerViewController works on iOS 11.