Can't create iPad XIB with Xcode 4

Alright, I have a problem on my hands. I'm trying to convert my project to a universal app for the iPhone and th开发者_如何学Pythone iPad. I'm trying to make iPad-specific versions of my XIB files. As it's not possible to Create iPad version using autoresizing masks in Xcode 4, I assumed I'd just be able to pop my XIB into Xcode 3's version of IB, and let that do the magic. No dice. Here's the error I get when i try to open the XIB file in IB:

To be honest I don't know where to proceed from here. I guess I could just resize my views manually, but that's quite tedious and I don't really have the time to be doing that. Any ideas?

Alright, I figured out a rather convoluted workaround.

First of all, duplicate your original project and then select your project info. Right-click on your target, and select "Duplicate".

Xcode will then pop up this message. Select "Duplicate and Transition to iPad".

Now Xcode converts the XIB files for you, and presents you with an iPad resources folder.

Now open these XIB files in the Finder, and append ~ipad after the file name.

After doing so, copy these XIB files back into your original project, and then turn your project into a universal project by selecting from the dropdown in your target settings.

And you're done. I found that really convoluted, and I'm hoping Apple can fix this huge usability problem soon.

This should not happen. One way to fix this problem would be t completely remove the Xcode 4 Installation and re install it from scratch . And then re install it.

Use the following command to uninstall and re install Xcode 4

sudo [xcode-path]/Library/uninstall-devtools --mode=all

PS: If you are creating projects in Xcode 4 that you also want to open in Xcode 3 make sure you keep Document Versioning section to Interface Builder 3.1