把已经存在的项目上传到http://git.oschina.net

配置ssh key（已配置请忽略）：
1、查看.ssh文件夹，没有则创建： mkdir ~/.ssh
2、切换目录：cd ~/.ssh
3、生成：ssh-keygen -t rsa -C "[email protected]"
4、 连续回车3次
5、查看公钥： cat id_rsa.pub
6、复制公钥：pbcopy

1、在http://git.oschina.net创建一个空项目，其中包含GitIgnore和readme文件

[email protected]

2、创建本地项目
3、cd进入本地项目目录，执行命令

yuanzhiyingdeMacBook-Pro:code yuanzhiying$ cd PictureBook/
yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ ls
PictureBook     PictureBookTests
PictureBook.xcodeproj   PictureBookUITests

4、初始化本地git库
git init
git add .
git commit -m "first commit"

yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ git init
Initialized empty Git repository in /Users/yuanzhiying/code/PictureBook/.git/

yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ git add .

yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ git commit -m "first commit"
[master (root-commit) 5a48875] first commit
 18 files changed, 1061 insertions(+)
 create mode 100644 PictureBook.xcodeproj/project.pbxproj
 create mode 100644 PictureBook.xcodeproj/project.xcworkspace/contents.xcworkspacedata
 create mode 100644 PictureBook.xcodeproj/project.xcworkspace/xcuserdata/yuanzhiying.xcuserdatad/UserInterfaceState.xcuserstate
 create mode 100644 PictureBook.xcodeproj/xcuserdata/yuanzhiying.xcuserdatad/xcschemes/PictureBook.xcscheme
 create mode 100644 PictureBook.xcodeproj/xcuserdata/yuanzhiying.xcuserdatad/xcschemes/xcschememanagement.plist
 create mode 100644 PictureBook/AppDelegate.h
 create mode 100644 PictureBook/AppDelegate.m
 create mode 100644 PictureBook/Assets.xcassets/AppIcon.appiconset/Contents.json
 create mode 100644 PictureBook/Base.lproj/LaunchScreen.storyboard
 create mode 100644 PictureBook/Base.lproj/Main.storyboard
 create mode 100644 PictureBook/Info.plist
 create mode 100644 PictureBook/ViewController.h
 create mode 100644 PictureBook/ViewController.m
 create mode 100644 PictureBook/main.m
 create mode 100644 PictureBookTests/Info.plist
 create mode 100644 PictureBookTests/PictureBookTests.m
 create mode 100644 PictureBookUITests/Info.plist
 create mode 100644 PictureBookUITests/PictureBookUITests.m

5、复制项目地址，执行命令：
git remote add origin [email protected]:yuanzhiying/PictureBook.git

yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ git remote add origin [email protected]:yuanzhiying/PictureBook.git

6、拉取远程的代码
git pull origin master --allow-unrelated-histories

yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ git pull origin master --allow-unrelated-histories
From git.oschina.net:yuanzhiying/PictureBook
 * branch            master     -> FETCH_HEAD
Merge made by the 'recursive' strategy.
 .gitignore |  20 ++++
 LICENSE    | 339 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 README.md  |   1 +
 3 files changed, 360 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 LICENSE
 create mode 100644 README.md

7、进行分支绑定：
git branch --set-upstream-to=origin/master main
或
git branch --set-upstream-to=origin/master master

yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ git branch --set-upstream-to=origin/master master
Branch master set up to track remote branch master from origin.

8、本地代码推送到远程
git push origin main
或
git push origin master

yuanzhiyingdeMacBook-Pro:PictureBook yuanzhiying$ git push origin master
Counting objects: 34, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (31/31), done.
Writing objects: 100% (34/34), 15.65 KiB | 0 bytes/s, done.
Total 34 (delta 4), reused 0 (delta 0)
To git.oschina.net:yuanzhiying/PictureBook.git
   d598d61..42ab837  master -> master