Renaming a Project
1. In Xcode, go to the navigator panel and select the target:
2. Go to the inspector panel (on the far right) and select the File Inspector icon. You can change the project name here. (You will get a pop-up dialogue to confirm the changes.)
Renaming a File
To change the name of an objective-C class file, select the file name in the navigator panel, then highlight the class name in the source file:
Now go to the Edit menu and choose Refactor -> Rename. You'll be prompted for the new file name. A pop-up dialogue will confirm the changes.