记：CocoaPods 安装FMDB第一次尝试

错误

• 错误类型 1：

[!] Invalid `Podfile` file: syntax error, unexpected ',', expecting end-of-input
'FMDB','~>2.6.2'
[!] Invalid `Podfile` file: syntax error, unexpected tSTRING_BEG, expecting end-of-input
platform:ios'8.0'
[!] The dependency `FMDB (~> 2.6.2)` is not used in any concrete target.
[!] Invalid `Podfile` file: syntax error, unexpected end-of-input, expecting keyword_end.

错误原因：podfile的配置不对，正确的配置如下：
platform :ios, '8.0'
target "no_name" do
pod 'FMDB', '~> 2.6.2'
end
注：标点和空格 一定要正确

• 错误类型 2:

 [!] Unable to satisfy the following requirements:
`FMDB (~> 2.6.2)` required by `Podfile`
None of your spec sources contain a spec satisfying the dependency: `FMDB (~> 2.6.2)`.
You have either:
 * out-of-date source repos which you can update with `pod repo update`.
 * mistyped the name or version.
 * not added the source repo that hosts the Podspec to your Podfile.
Note: as of CocoaPods 1.0, `pod repo update` does not happen on `pod install` by default.

执行下面命令

sudo gem install cocoapods --pre
报错
ERROR:  While executing gem ... (Errno::EPERM)
    Operation not permitted - /usr/bin/pod

执行下面命令

// 移除本地master
sudo rm -fr ~/.cocoapods/repos/master
// 移除本地缓存
sudo rm -fr ~/Library/Caches/CocoaPods/
// 重新setup,如果网速较慢,可以在后面加上 --verbose
pod setup
报错
Setting up CocoaPods master repo
[!] The `master` repo requires CocoaPods 1.0.0 -  (currently using 0.36.4)
Update CocoaPods, or checkout the appropriate tag in the repo.
localhost:no_name Loji$ sudo gem update cocoapods
Password:
Updating installed gems
Updating cocoapods
ERROR:  While executing gem ... (Errno::EPERM)
    Operation not permitted - /usr/bin/pod

执行命令

sudo gem install -n /usr/local/bin cocoapods
成功Successfully installed cocoapods-1.1.1
重新执行：pod setup
出现蓝色字体Setup completed
pod install  成功
```
####CocoaPods常用命令
1. pod install
根据Podfile文件指定的内容，安装依赖库，如果有Podfile.lock文件而且对应的Podfile文件未被修改，则会根据Podfile.lock文件指定的版本安装。
每次更新了Podfile文件时，都需要重新执行该命令，以便重新安装Pods依赖库。
2. pod update
若果Podfile中指定的依赖库版本不是写死的，当对应的依赖库有了更新，无论有没有Podfile.lock文件都会去获取Podfile文件描述的允许获取到的最新依赖库版本。
3. pod search <第三方库>
4. pod --version 查看版本
5. sudo gem uninstall cocoapods 卸载cocoapods