1、打開終端cd到本地倉庫羡棵，和.git同層（查看隱藏文件）
$ cd project
$ ls -a
2顶猜、創(chuàng)建.gitignore文件
$ vim .gitignore
3窃爷、鍵入 "i"，看到下面這個奕污，進(jìn)入編輯模式
-- INSERT --
4萎羔、把下面的這些復(fù)制進(jìn)去
# Xcode
#
# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
## Build generated
build/
DerivedData/
## Various settings
*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
xcuserdata/
## Other
*.moved-aside
*.xccheckout
*.xcscmblueprint
## Obj-C/Swift specific
*.hmap
*.ipa
*.dSYM.zip
*.dSYM
# CocoaPods
#
# We recommend against adding the Pods directory to your .gitignore. However
# you should judge for yourself, the pros and cons are mentioned at:
# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
#
# Pods/
#
# Add this line if you want to avoid checking in source code from the Xcode workspace
# *.xcworkspace
# Carthage
#
# Add this line if you want to avoid checking in source code from Carthage dependencies.
# Carthage/Checkouts
Carthage/Build
# fastlane
#
# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
# screenshots whenever they are needed.
# For more information about the recommended setup visit:
# https://docs.fastlane.tools/best-practices/source-control/#source-control
fastlane/report.xml
fastlane/Preview.html
fastlane/screenshots/**/*.png
fastlane/test_output
# Code Injection
#
# After new code Injection tools there's a generated folder /iOSInjectionProject
# https://github.com/johnno1962/injectionforxcode
iOSInjectionProject/
5、鍵入 "esc" 碳默，退出編輯模式
6贾陷、鍵入 ":wq" ，保存并退出
到這里嘱根，就創(chuàng)建好了".gitignore"文件了Ｋ璺稀！
7儿子、gitignore規(guī)則不生效的解決辦法瓦哎，先把本地緩存刪除然后更新
git rm -r --cached .
git add .
git commit -m 'update .gitignore'
