git作为代码管理工具，.gitignore文件用来忽略哪些哪些文件不用添加到仓库管理
https://www.gitignore.io/ 这个网址输入变成语言会帮你生成常用的忽略文件
如：IOS项目，输入Xcode、Object-C、Swift、C、C++、git、svn生成：
# Created by https://www.gitignore.io/api/objective-c,swift,c,c++,xcode,git,svn### Objective-C ###
# 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
*.xcuserstate## 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/# Carthage
#
# Add this line if you want to avoid checking in source code from Carthage dependencies.
# Carthage/CheckoutsCarthage/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://github.com/fastlane/fastlane/blob/master/fastlane/docs/Gitignore.mdfastlane/report.xml
fastlane/Preview.html
fastlane/screenshots
fastlane/test_output# Code Injection
#
# After new code Injection tools there's a generated folder /iOSInjectionProject
# https://github.com/johnno1962/injectionforxcodeiOSInjectionProject/### Objective-C Patch ###
*.xcscmblueprint### Swift ###
# Xcode
#
# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore## Build generated## Various settings## Other## Obj-C/Swift specific## Playgrounds
timeline.xctimeline
playground.xcworkspace# Swift Package Manager
#
# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
# Packages/
.build/# 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/# Carthage
#
# Add this line if you want to avoid checking in source code from Carthage dependencies.
# Carthage/Checkouts# 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://github.com/fastlane/fastlane/blob/master/fastlane/docs/Gitignore.md### C ###
# Prerequisites
*.d# Object files
*.o
*.ko
*.obj
*.elf# Linker output
*.ilk
*.map
*.exp# Precompiled Headers
*.gch
*.pch# Libraries
*.lib
*.a
*.la
*.lo# Shared objects (inc. Windows DLLs)
*.dll
*.so
*.so.*
*.dylib# Executables
*.exe
*.out
*.app
*.i*86
*.x86_64
*.hex# Debug files
*.dSYM/
*.su
*.idb
*.pdb# Kernel Module Compile Results
*.mod*
*.cmd
modules.order
Module.symvers
Mkfile.old
dkms.conf### C++ ###
# Prerequisites# Compiled Object files
*.slo# Precompiled Headers# Compiled Dynamic libraries# Fortran module files
*.mod
*.smod# Compiled Static libraries
*.lai# Executables### Xcode ###
# Xcode
#
# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore## Build generated## Various settings## Other
*.xccheckout### Git ###
*.orig### SVN ###
.svn/
###macOS###
*.DS_Store
.AppleDouble
.LSOverride# Icon must end with two \r
# Icon
# Thumbnails
._*
# Files that might appear in the root of a volume
.DocumentRevisions-V100
.fseventsd
.Spotlight-V100
.TemporaryItems
.Trashes
.VolumeIcon.icns
.com.apple.timemachine.donotpresent
# Directories potentially created on remote AFP share
.AppleDB
.AppleDesktop
#Network Trash Folder
#Temporary Items
.apdisk
Android项目，输入Eclipse、Java、C、C++、Android、Intellij、Intellij+iml、git、svn生成：
# Created by https://www.gitignore.io/api/java,c,c++,android,eclipse,intellij,intellij+iml### C ###
# Prerequisites
*.d# Object files
*.o
*.ko
*.obj
*.elf# Linker output
*.ilk
*.map
*.exp# Precompiled Headers
*.gch
*.pch# Libraries
*.lib
*.a
*.la
*.lo# Shared objects (inc. Windows DLLs)
*.dll
*.so
*.so.*
*.dylib# Executables
*.exe
*.out
*.app
*.i*86
*.x86_64
*.hex# Debug files
*.dSYM/
*.su
*.idb
*.pdb# Kernel Module Compile Results
*.mod*
*.cmd
modules.order
Module.symvers
Mkfile.old
dkms.conf### C++ ###
# Prerequisites# Compiled Object files
*.slo# Precompiled Headers# Compiled Dynamic libraries# Fortran module files
*.mod
*.smod# Compiled Static libraries
*.lai# Executables### Android ###
# Built application files
*.apk
*.ap_# Files for the ART/Dalvik VM
*.dex# Java class files
*.class# Generated files
bin/
gen/
out/# Gradle files
.gradle/
build/# Local configuration file (sdk path, etc)
local.properties# Proguard folder generated by Eclipse
proguard/# Log Files
*.log# Android Studio Navigation editor temp files
.navigation/# Android Studio captures folder
captures/# Intellij
*.iml
.idea/workspace.xml
.idea/tasks.xml
.idea/libraries# Keystore files
*.jks# External native build folder generated in Android Studio 2.2 and later
.externalNativeBuild### Android Patch ###
gen-external-apklibs### Eclipse ###.metadata
tmp/
*.tmp
*.bak
*.swp
*~.nib
.settings/
.loadpath
.recommenders# Eclipse Core
.project# External tool builders
.externalToolBuilders/# Locally stored "Eclipse launch configurations"
*.launch# PyDev specific (Python IDE for Eclipse)
*.pydevproject# CDT-specific (C/C++ Development Tooling)
.cproject# JDT-specific (Eclipse Java Development Tools)
.classpath# Java annotation processor (APT)
.factorypath# PDT-specific (PHP Development Tools)
.buildpath# sbteclipse plugin
.target# Tern plugin
.tern-project# TeXlipse plugin
.texlipse# STS (Spring Tool Suite)
.springBeans# Code Recommenders
.recommenders/### Intellij ###
# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839# User-specific stuff:# Sensitive or high-churn files:
.idea/dataSources/
.idea/dataSources.ids
.idea/dataSources.xml
.idea/dataSources.local.xml
.idea/sqlDataSources.xml
.idea/dynamic.xml
.idea/uiDesigner.xml# Gradle:
.idea/gradle.xml# Mongo Explorer plugin:
.idea/mongoSettings.xml## File-based project format:
*.iws## Plugin-specific files:# IntelliJ
/out/# mpeltonen/sbt-idea plugin
.idea_modules/# JIRA plugin
atlassian-ide-plugin.xml# Crashlytics plugin (for Android Studio and IntelliJ)
com_crashlytics_export_strings.xml
crashlytics.properties
crashlytics-build.properties
fabric.properties### Intellij Patch ###
# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721# *.iml
# modules.xml
# .idea/misc.xml
# *.ipr### Intellij+iml ###
# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839# User-specific stuff:# Sensitive or high-churn files:# Gradle:# Mongo Explorer plugin:## File-based project format:## Plugin-specific files:# IntelliJ# mpeltonen/sbt-idea plugin# JIRA plugin# Crashlytics plugin (for Android Studio and IntelliJ)### Intellij+iml Patch ###
# Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-249601023 modules.xml
.idea/misc.xml
*.ipr### Java #### BlueJ files
*.ctxt# Mobile Tools for Java (J2ME)
.mtj.tmp/# Package Files #
*.jar
*.war
*.ear# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid*
### Git ###
*.orig### SVN ###
.svn/
###macOS###
*.DS_Store
.AppleDouble
.LSOverride# Icon must end with two \r
# Icon
# Thumbnails
._*
# Files that might appear in the root of a volume
.DocumentRevisions-V100
.fseventsd
.Spotlight-V100
.TemporaryItems
.Trashes
.VolumeIcon.icns
.com.apple.timemachine.donotpresent
# Directories potentially created on remote AFP share
.AppleDB
.AppleDesktop
#Network Trash Folder
#Temporary Items
.apdisk
J2EE项目，输入Eclipse、Java、Intellij、Intellij+iml、git、svn生成：
# Created by https://www.gitignore.io/api/eclipse,intellij,intellij+iml,java### Eclipse ###.metadata
bin/
tmp/
*.tmp
*.bak
*.swp
*~.nib
local.properties
.settings/
.loadpath
.recommenders# Eclipse Core
.project# External tool builders
.externalToolBuilders/# Locally stored "Eclipse launch configurations"
*.launch# PyDev specific (Python IDE for Eclipse)
*.pydevproject# CDT-specific (C/C++ Development Tooling)
.cproject# JDT-specific (Eclipse Java Development Tools)
.classpath# Java annotation processor (APT)
.factorypath# PDT-specific (PHP Development Tools)
.buildpath# sbteclipse plugin
.target# Tern plugin
.tern-project# TeXlipse plugin
.texlipse# STS (Spring Tool Suite)
.springBeans# Code Recommenders
.recommenders/### Intellij ###
# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839# User-specific stuff:
.idea/workspace.xml
.idea/tasks.xml# Sensitive or high-churn files:
.idea/dataSources/
.idea/dataSources.ids
.idea/dataSources.xml
.idea/dataSources.local.xml
.idea/sqlDataSources.xml
.idea/dynamic.xml
.idea/uiDesigner.xml# Gradle:
.idea/gradle.xml
.idea/libraries# Mongo Explorer plugin:
.idea/mongoSettings.xml## File-based project format:
*.iws## Plugin-specific files:# IntelliJ
/out/# mpeltonen/sbt-idea plugin
.idea_modules/# JIRA plugin
atlassian-ide-plugin.xml# Crashlytics plugin (for Android Studio and IntelliJ)
com_crashlytics_export_strings.xml
crashlytics.properties
crashlytics-build.properties
fabric.properties### Intellij Patch ###
# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721# *.iml
# modules.xml
# .idea/misc.xml
# *.ipr### Intellij+iml ###
# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839# User-specific stuff:# Sensitive or high-churn files:# Gradle:# Mongo Explorer plugin:## File-based project format:## Plugin-specific files:# IntelliJ# mpeltonen/sbt-idea plugin# JIRA plugin# Crashlytics plugin (for Android Studio and IntelliJ)### Intellij+iml Patch ###
# Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-249601023 *.iml
modules.xml
.idea/misc.xml
*.ipr### Java ###
*.class# BlueJ files
*.ctxt# Mobile Tools for Java (J2ME)
.mtj.tmp/# Package Files #
*.jar
*.war
*.ear# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid*
### Git ###
*.orig### SVN ###
.svn/
###macOS###
*.DS_Store
.AppleDouble
.LSOverride# Icon must end with two \r
# Icon
# Thumbnails
._*
# Files that might appear in the root of a volume
.DocumentRevisions-V100
.fseventsd
.Spotlight-V100
.TemporaryItems
.Trashes
.VolumeIcon.icns
.com.apple.timemachine.donotpresent
# Directories potentially created on remote AFP share
.AppleDB
.AppleDesktop
#Network Trash Folder
#Temporary Items
.apdisk
