I have an Xcode project which was downloaded from the internet so I don\'t know which Xcode version was used to write it but the language is Swift 2. I opened it in Xcode 7.
The above answers are correct. I have a bit similar approach.
After, I use these steps:
Clean the project.
Remove your Assets from your project(Remove References). Run the project without assets. Now the project will show some compile errors, these are not very tricky.
Run the project, this time project run without your assets and may be chances of crash. This ensures that project will run.
Now clean the project and add the assets, now run the project. The project runs successfully.
For me it works. I hope it will be helpful to you.