问题
I created a today extension coded in Objective c and I have decided that I do not want it in my app. I removed the scheme, the target and all the files that were associated with it, yet it remained in my notification center. I deleted the app and it was no longer in the notification center, then when I ran the app again it was back. Im afraid that when I submit the app there will be an empty widget as an option to add to notification center. Does anybody know how I can completely delete the extension from the app? Thanks!
回答1:
I simply did a product clean.
Just press command+shift+k
Now build and run and you should be all good!
回答2:
I know this is a little old, but recently I've had a similar problem with WatchKit extension, which kept popping on my Watch when I installed the app on iPhone. In my case it was due to the DerivedData folder:
In Xcode open Preferences->Locations and go to the DerivedData folder and delete everything.
I have also cleaned the project (cmd+shift+k) but I'm not sure if this was necessary.
Also if you encounter this problem it is always worth to check the Target->Build Phases's Target Dependencies & Embed App Extensions shouldn't have any mention of the Extension you don't want to use (or possibly shouldn't even be there if you don't have any extensions or target dependencies.
来源：https://stackoverflow.com/questions/26435762/ios-8-remove-today-extension