I have an App developed in XCode, the DataBase was made in Sqlite, but when I remove the app from my iOS device, I lost all the information from that DB. When I install the App again, I have the DB but without information inside.
Can I keep that file.sqlite (in a cloud)? And when app is reinstalled (download) to use the same file.sqlite and to have the data that I had before in that file.
No you cannot keep the file.sqlite on the filesystem after your app is uninstalled. As soon as the app is uninstalled the associated data file is also deleted.