对于Xcode 4，我还添加了:

YourProjectName.xcodeproj/xcuserdata/*
YourProjectName.xcodeproj/project.xcworkspace/xcuserdata/*

你应该结账给gitignore。用于Objective-C和Swift。

下面是我正在使用的.gitignore文件:

# Xcode
.DS_Store
*/build/*
*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
xcuserdata
profile
*.moved-aside
DerivedData
.idea/
*.hmap
*.xccheckout
*.xcworkspace
!default.xcworkspace

#CocoaPods
Pods

我建议使用joe生成一个.gitignore文件。

对于iOS项目，执行如下命令:

$ Joe g osx,xcode > .gitignore

它会生成。gitignore:

.DS_Store
.AppleDouble
.LSOverride

Icon
._*

.DocumentRevisions-V100
.fseventsd
.Spotlight-V100
.TemporaryItems
.Trashes
.VolumeIcon.icns

.AppleDB
.AppleDesktop
Network Trash Folder
Temporary Items
.apdisk

build/
DerivedData

*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
xcuserdata

*.xccheckout
*.moved-aside
*.xcuserstate

如果有人需要一个标准的gitignore文件作为一个简单的方法。

在导航到项目后，在cmd/ terminal中运行这一行。

npx gitignore Objective-C

我使用以下在gitignore.io中生成的.gitignore文件:

### Xcode ###
build/
*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
xcuserdata
*.xccheckout
*.moved-aside
DerivedData
*.xcuserstate


### Objective-C ###
# Xcode
#
build/
*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
xcuserdata
*.xccheckout
*.moved-aside
DerivedData
*.hmap
*.ipa
*.xcuserstate

# CocoaPods
#
# We recommend against adding the Pods directory to your .gitignore. However
# you should judge for yourself, the pros and cons are mentioned at:
# http://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control
#
Pods/

对于Xcode 5，我添加:

####
# Xcode 5 - VCS metadata
#
*.xccheckout

选自Berik的答案