剛開始學習swift，什麼都不明白，希望在項目中引用AFNworking，訪問網絡服務，不知道如何使用，先是直接把文件copy到項目中完全沒有用，找了一些 swift調用C 和object_c的例子，試着是要加一個橋接文件，可以成功的調用，但是沒有正常的提示符。
在羣中問了一下，有人提示 cocoapods，好搜索了一下這個東本，發現了：
CocoaPods安裝和使用教程
http://code4app.com/article/cocoapods-install-usage
這個寫的非常好，按其中的操作來做，但遇到這樣的問題：
[!] /usr/bin/git clone 'https://github.com/CocoaPods/Specs.git' master --depth=1
xcrun: error: active developer path ("/Volumes/Xcode/Xcode.app/Contents/Developer") does not exist, use xcode-select to change
<code style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; white-space: inherit;"><span class="pln" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background-color: transparent;"><span style="background-color: transparent; white-space: inherit;">sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer </span></span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background-color: transparent; color: rgb(43, 145, 175);">即可解決。</span></code>
但我是執行的時候，還是報錯誤，
xcode-select: error: invalid developer directory '/Applications/Xcode.app/Contents/Developer'
沒有目錄，又找找，發現問題是出現在Xcode.app這裏，我用的是Xcode6-Beta.app修改一下命令如下sudo xcode-select -switch /Applications/Xcode6-Beta.app/Contents/Developer
成功了：
usertekiMacBook-Air:~ user$ sudo xcode-select -switch /Applications/Xcode6-Beta.app/Contents/Developer
usertekiMacBook-Air:~ user$ pod search AFNetworking
Setting up CocoaPods master repo
Setup completed (read-only access)
AFNetworking (2.3.1)
A delightful iOS and OS X networking framework.
pod 'AFNetworking', '~> 2.3.1'
- Homepage: https://github.com/AFNetworking/AFNetworking
- Source: https://github.com/AFNetworking/AFNetworking.git
- Versions: 2.3.1, 2.3.0, 2.2.4, 2.2.3, 2.2.2, 2.2.1, 2.2.0, 2.1.0, 2.0.3,
2.0.2, 2.0.1, 2.0.0, 2.0.0-RC3, 2.0.0-RC2, 2.0.0-RC1, 1.3.4, 1.3.3, 1.3.2,
1.3.1, 1.3.0, 1.2.1, 1.2.0, 1.1.0, 1.0.1, 1.0, 1.0RC3, 1.0RC2, 1.0RC1,
0.10.1, 0.10.0, 0.9.2, 0.9.1, 0.9.0, 0.7.0, 0.5.1 [master repo]
- Sub specs:
- AFNetworking/Serialization (2.3.1)
- AFNetworking/Security (2.3.1)
- AFNetworking/Reachability (2.3.1)
- AFNetworking/NSURLConnection (2.3.1)
- AFNetworking/NSURLSession (2.3.1)
- AFNetworking/UIKit (2.3.1)
-> AFNetworking+AutoRetry (0.0.3)
Auto Retries for AFNetworking requests
pod 'AFNetworking+AutoRetry', '~> 0.0.3'
- Homepage: https://github.com/shaioz/AFNetworking-AutoRetry
- Source: https://github.com/shaioz/AFNetworking-AutoRetry.git
- Versions: 0.0.3, 0.0.2, 0.0.1 [master repo]
-> AFNetworking+streaming (0.5)
A very quick extension to AFNetworking that adds stream based parsing
pod 'AFNetworking+streaming', '~> 0.5'
- Homepage: https://github.com/deanWombourne/AFNetworking-streaming
- Source: https://github.com/deanWombourne/AFNetworking-streaming.git
- Versions: 0.5, 0.4, 0.3, 0.2, 0.1 [master repo]
- Sub specs:
- AFNetworking+streaming/Core (0.5)
- AFNetworking+streaming/Json (0.5)
-> AFNetworking-MUResponseSerializer (1.0.0)
Automatically serialize JSON response to your object model. It also works
with NSManagedObjects.
pod 'AFNetworking-MUResponseSerializer', '~> 1.0.0'
- Homepage: https://github.com/Ulianko/AFNetworking-MUResponseSerializer
- Source: https://github.com/Ulianko/AFNetworking-MUResponseSerializer.git
- Versions: 1.0.0 [master repo]
-> AFNetworking-RACExtensions (0.1.4)
AFNetworking-RACExtensions is a delightful extension to the AFNetworking
classes for iOS and Mac OS X.
pod 'AFNetworking-RACExtensions', '~> 0.1.4'
- Homepage: https://github.com/CodaFi/AFNetworking-RACExtensions
- Source: https://github.com/CodaFi/AFNetworking-RACExtensions.git
- Versions: 0.1.4, 0.1.2, 0.1.1, 0.0.1 [master repo]
-> AFNetworking-ReactiveCocoa (0.0.2)
Make AFNetworking reactive.
pod 'AFNetworking-ReactiveCocoa', '~> 0.0.2'
- Homepage: https://github.com/uasi/AFNetworking-ReactiveCocoa
- Source: https://github.com/uasi/AFNetworking-ReactiveCocoa.git
- Versions: 0.0.2, 0.0.1 [master repo]
-> AFNetworking-Synchronous (0.2.0)
Synchronous requests for AFNetworking
pod 'AFNetworking-Synchronous', '~> 0.2.0'
- Homepage: https://github.com/paulmelnikow/AFNetworking-Synchronous
- Source: https://github.com/paulmelnikow/AFNetworking-Synchronous.git
- Versions: 0.2.0, 0.1.0 [master repo]
-> AFNetworking2-RACExtensions (0.0.1)
AFNetworking-RACExtensions is a delightful extension to the AFNetworking
classes for iOS and Mac OS X.
pod 'AFNetworking2-RACExtensions', '~> 0.0.1'
- Homepage: https://github.com/knshiro/AFNetworking-RACExtensions
- Source: https://github.com/knshiro/AFNetworking-RACExtensions.git
- Versions: 0.0.1 [master repo]
-> CollectionUtils-AFNetworking (1.0.1)
CollectionUtils additions for AFNetworking.
pod 'CollectionUtils-AFNetworking', '~> 1.0.1'
- Homepage: https://github.com/kishikawakatsumi/CollectionUtils
- Source: https://github.com/kishikawakatsumi/CollectionUtils.git
- Versions: 1.0.1, 1.0.0 [master repo]
-> CollectionUtils-AFNetworking-1.3 (1.0.1)
CollectionUtils additions for AFNetworking 1.3.x.
pod 'CollectionUtils-AFNetworking-1.3', '~> 1.0.1'
- Homepage: https://github.com/kishikawakatsumi/CollectionUtils
- Source: https://github.com/kishikawakatsumi/CollectionUtils.git
- Versions: 1.0.1, 1.0.0 [master repo]
usertekiMacBook-Air:~ user$