Xcode 6.1 keeps telling me some PartialInfo.plist couldn't be opened

Question

After I upgraded to Xcode 6.1, it kept throwing this exception when I tried to build my existing application. I tried to remove 'MyController' and add back again. But it would throw the same exception with different controller.

could not read data from '/Users/macbookpro/Library/Developer/Xcode/DerivedData/MyApp-
dmhwkhbfbxprhycwjeunwtbbtsxj/Build/Intermediates/MyApp.build/DEV-iphoneos/MyApp.build/MyController-
PartialInfo.plist': The file “MyController-PartialInfo.plist” couldn’t be opened because there is no
such file.

Answer 1

I found the answer. I have to replace all xib files' IBCocoaTouchPlugin to newer version.

<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6244"/>

Answer 2

You can solve it by deleting the content in the DerivedData folder. If you're worried about deleting too many folders, then delete only the folders that start with the name of your current project that you're trying to problem-solve for. Remember to close XCode before you delete the data

Library/Developer/Xcode/DerivedData/

Answer 3

For me (with Xcode 6.3) this was happening with a file that happened to end in ~iPhone.xib. I changed it end in the all lower-case ~iphone.xib, and problem solved.

Answer 4

This is generally happens when you open old version xibs nothing to do only click on the xib in file panel its version will automatically changed/updated with newer version.

so also you not need to remember it.

Answer 5

I encountered this problem when I moved my .plist file to a new folder. You have to go into the Targets list (select the top bar on the left vertical menu of Xcode, the one that has the name of your project, and then select Targets on the vertical menu second from the left) and find the Identity section. From there, select the button that lets you specify the new path of the .plist file.

If that doesn't work, then try deleting your project's folder in ~/Library/Developer/Xcode/DerivedData/ and building again.

Answer 6

Several of you have come up with the partial answer.

I believe this issue is related to Apple's "fix" for when XIBs were loading slowly when they referenced custom fonts. They now store the custom font info in a xibnamePartialInfo.plist file in your derivedData folder.

Now if your app contains xibname~iPhone.xib AND xibname.xib, only the PartialInfo.plist file for xibname~iPhone.xib gets created and you see the error. Opening the xib in InterfaceBuilder had the side-effect of creating this file which is why the problem appeared to go away (until the next clean).

So the solution is to rename all ~iPhone files to something else (dash works as a replacement for tilde). Apparently its the tilde that is hindering the creation of the PartialInfo.plist file for the root XIB

Answer 7

Common answer for most of question... Restart Xcode. It works for me.