ios：我应该在哪里保存应用程序数据文件，Temp或Document文件夹？

Question

I'm building a video library application using Swift, I am wondering where to keep downloaded video files, is it better to use Document folder or just using the temp folder.

let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]
// OR
let documentsPath = NSTemporaryDirectory()

Thanks!

Answer 1

If want user to be able to access the videos from iTunes ( See here on how to do it ) than you should save videos in DocumentDirectory and if those videos are not that usefull and should be deleted than you can save them in NSTemporaryDirectory . It depends on how important are those videos in your app.

Videos in DocumentDirectory will be saved permanently while NSTemporaryDirectory can be cleared by OS when device is running short of memory as it is assumed that content in NSTemporaryDirectory is not that critical and should be redownloaded by app if needed

Also follow remember to follow this iOS Data Storage Guidelines guidelines and mark your files as "Do not backup"