I’m doing with lot of projects, some projects are similar, thus I can just clone from the
existing project and rename it. But how to rename it completely?

1. Change the project name in Xcode

Original name

Click on the project, at the right pane, update the name to the name that you want,
then hit <Enter>

Rename confirmation

Then it will prompt you which one to rename, just check all and hit <Enter>

2. Rename scheme

Rename scheme

Click the scheme up there, then Manage schemes…

Change scheme name

Then change the scheme name (click on that row, then hit <Enter>)

3. Rename in Terminal

Close the Xcode first.

Then try to search for your project name

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$ cd /path/to/JsFoo/
$ grep -R "JsFoo" *
JsBar.xcodeproj/project.pbxproj:        4B5454051A5E0E0200FD515D /* JsFooTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4B5454041A5E0E0200FD515D /* JsFooTests.swift */; };
JsBar.xcodeproj/project.pbxproj:            remoteInfo = JsFoo;
JsBar.xcodeproj/project.pbxproj:        4B5454041A5E0E0200FD515D /* JsFooTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = JsFooTests.swift; sourceTree = "<group>"; };
JsBar.xcodeproj/project.pbxproj:                4B5453EB1A5E0E0200FD515D /* JsFoo */,
JsBar.xcodeproj/project.pbxproj:                4B5454011A5E0E0200FD515D /* JsFooTests */,
JsBar.xcodeproj/project.pbxproj:        4B5453EB1A5E0E0200FD515D /* JsFoo */ = {
JsBar.xcodeproj/project.pbxproj:            path = JsFoo;
JsBar.xcodeproj/project.pbxproj:        4B5454011A5E0E0200FD515D /* JsFooTests */ = {
JsBar.xcodeproj/project.pbxproj:                4B5454041A5E0E0200FD515D /* JsFooTests.swift */,
JsBar.xcodeproj/project.pbxproj:            path = JsFooTests;
JsBar.xcodeproj/project.pbxproj:            productName = JsFoo;
JsBar.xcodeproj/project.pbxproj:            productName = JsFooTests;
JsBar.xcodeproj/project.pbxproj:                4B5454051A5E0E0200FD515D /* JsFooTests.swift in Sources */,
JsBar.xcodeproj/project.pbxproj:                INFOPLIST_FILE = JsFoo/Info.plist;
JsBar.xcodeproj/project.pbxproj:                INFOPLIST_FILE = JsFoo/Info.plist;
JsBar.xcodeproj/project.pbxproj:                INFOPLIST_FILE = JsFooTests/Info.plist;
JsBar.xcodeproj/project.pbxproj:                TEST_HOST = "$(BUILT_PRODUCTS_DIR)/JsFoo.app/JsFoo";
JsBar.xcodeproj/project.pbxproj:                INFOPLIST_FILE = JsFooTests/Info.plist;
JsBar.xcodeproj/project.pbxproj:                TEST_HOST = "$(BUILT_PRODUCTS_DIR)/JsFoo.app/JsFoo";
Binary file JsBar.xcodeproj/project.xcworkspace/xcuserdata/js.xcuserdatad/UserInterfaceState.xcuserstate matches
JsFoo/AppDelegate.swift://  JsFoo
JsFoo/ViewController.swift://  JsFoo
JsFooTests/JsFooTests.swift://  JsFooTests.swift
JsFooTests/JsFooTests.swift://  JsFooTests
JsFooTests/JsFooTests.swift:class JsFooTests: XCTestCase {

It seems a lot to change… No worry, there is an easy way to do it

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$ grep -Rl "JsFoo" * | xargs sed -i "" "s/JsFoo/JsBar/"
sed: Binary: No such file or directory

grep to search for “JsFoo”, and the -l option is to show the file name only,
then only pass the result to sed to change “JsFoo” to “JsBar”

Try to search again…

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$ grep -R "JsFoo" *
Binary file JsBar.xcodeproj/project.xcworkspace/xcuserdata/js.xcuserdatad/UserInterfaceState.xcuserstate matches
JsFoo/AppDelegate.swift://  JsFoo
JsFoo/ViewController.swift://  JsFoo
JsFooTests/JsFooTests.swift://  JsFooTests.swift
JsFooTests/JsFooTests.swift://  JsFooTests
JsFooTests/JsFooTests.swift:class JsFooTests: XCTestCase {

Oops… Some files haven’t change. The reason for this is because one of the file is actually
a binary file, up until there the instruction is break. Let’s do again and exclude that binary
file

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$ grep -Rl "JsFoo" JsFoo*/* | xargs sed -i "" "s/JsFoo/JsBar/"

Search again?

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$ grep -R "JsFoo" *
Binary file JsBar.xcodeproj/project.xcworkspace/xcuserdata/js.xcuserdatad/UserInterfaceState.xcuserstate matches

Done! Now totally no more “JsFoo”. One more thing, rename the folders

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$ mv JsFoo JsBar
$ mv JsFooTests JsBarTests

Now you can open up your Xcode project, and build it

Build error

Oops… Got error?

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<unknown>0: error: no such file or directory: '.../JsBarTests/JsBarTests.swift'

One more file that we forgot to rename

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$ mv JsBarTests/JsFooTests.swift JsBarTests/JsBarTests.swift

Successful rename

Done!!!

Update: 2015-05-06

Xcode 6.3.1 will crash during the rename.
And I found a simpler way on doing that, refer here

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# install the necessary package
$ brew install rename ack

# run this for a couple of times
$ find . -name 'JsFoo*' -print0 | xargs -0 rename -S 'JsFoo' 'JsBar'

$ ack --literal --files-with-matches 'JsFoo' | xargs sed -i '' 's/JsFoo/JsBar/g'

# double confirm, if no output, that means success
$ ack --literal 'JsFoo'