使用cocoapods时常见错误
错误1
当写在Podfile文件中的第三方框架，不能使用，找不到时
查看Pods文件夹，是否下载了所需要的第三方框架，没有的话就 pod update
错误2
Could not automatically select an Xcode project. Specify one in your
Podfile like so:xcodeproj 'path/to/Project.xcodeproj'
在Podfile文件里指定下工程目录就行了
xcodeproj 'Demo/Demo.xcodeproj'
但是如果cocoapods版本为（1.0.0）的话，可能会有以下警告
[!] xcodeproj was renamed to `project`. Please use that from now on.
这时只需要把xcodeproj改为 project就行了
project 'Demo/Demo.project'
错误3
The dependency `AFNetworking (~> 3.0)` is not used in any concrete target.
在Podfile中添加
target‘项目名'do (如 target 'Demo' do )
错误4
[!] Invalid `Podfile` file: syntax error, unexpected end-of-input, expecting keyword_end.````
在Podfile的末尾添加 `end`
####错误5
Unable to find the Xcode project /Volumes/BIAO/iOS/code/MBWB.xcodeproj for the target Pods.
在Podfile中 将 ` project 'Demo/Demo.project’ ` 改成 `project 'Demo.project'`
错误6
build diff: /../Podfile.lock: No such file or directory
在工程设置中的Build Phases下删除Check Pods Manifest.lock及Copy Pods Resources
更新慢的问题：
无论是执行pod install还是pod update都卡在了Analyzing dependencies不动
原因在于当执行以上两个命令的时候会升级CocoaPods的spec仓库，加一个参数可以省略这一步，然后速度就会提升不少。加参数的命令如下：
pod install --verbose --no-repo-update
pod update --verbose --no-repo-update
错误7
使用install、update命令时，报错：Could not automatically select an Xcode workspace.
Specify one in your Podfile like so: workspace 'path/to/Workspace.xcworkspace'
解决这个问题需要先cd进入到podfile所在的文件夹，然后再执行install、update命令就没问题了
错误8
更新Cocoapod之后出现问题：
diff: /../Podfile.lock: No such file or directory
diff: Manifest.lock: No such file or directory
error: The sandbox is not in sync with the Podfile.lock.
Run 'pod install' or update your CocoaPods installation.`
解决方案：
关闭现在的工作空间，删掉以前的xcworkspace，然后重新pod install，install完后，重新打开项目，clean＋build项目，运行
rm -rf MyProject.xcworkspace
pod install
问题9
None of your spec sources contain a spec satisfying the dependency
$ pod install
Analyzing dependencies
[!] Unable to satisfy the following requirements:
-AFNetworking (~> 3.0) required by Podfile
None of your spec sources contain a spec satisfying the dependency: AFNetworking (~> 3.0).
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* out-of-date source repos which you can update with pod repo update.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.
解决方案
$ pod repo remove master
$ pod repo add master https://gitcafe.com/akuandev/Specs.git
$ pod repo update