CocoaPods报错：The dependency `AFNetworking ` is not used in any concrete target

本文转载自：http://blog.youkuaiyun.com/sjl_leaf/article/details/50506057

感谢原作者
ex:

The dependency ` is not used in any concrete target
The dependencyAFNetworking ` is not used in any concrete target

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CocoaPods再遇困难，前几天电脑重装了系统，所有的开发工具就都装了最新的，当我用CocoaPods的时候，出了一个提示，大概就是我的版本不是 last version，然后给你提示了一个命令，直接复制即可，就是下面这个：

sudo gem install cocoapods –pre

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安装cocoapods的预览版本，就会更新下来新的1.0.0.beta.2版本，如下所示：

Successfully installed cocoapods-1.0.0.beta.2
Parsing documentation for cocoapods-1.0.0.beta.2

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很高兴啊，更新了新的版本，然而pod install就出错了，悲了个剧！出错如下：

Updating local specs repositories
Analyzing dependencies
[!] The dependency FMDB (~> 2.3) is not used in any concrete target.
The dependency SDWebImage (~> 3.6) is not used in any concrete target.
The dependency AFNetworking (~> 2.3.0) is not used in any concrete target.
The dependency DACircularProgress (~> 2.2.0) is not used in any concrete target.
The dependency MBProgressHUD (~> 0.8) is not used in any concrete target.
The dependency PSTCollectionView (~> 1.2.1) is not used in any concrete target.
The dependency HPGrowingTextView (~> 1.1) is not used in any concrete target.
The dependency ProtocolBuffers (= 1.9.3) is not used in any concrete target.
The dependency leveldb-library (~> 1.18.1) is not used in any concrete target.
The dependency SCLAlertView-Objective-C (~> 0.7.5) is not used in any concrete target.
The dependency MWPhotoBrowser (~> 1.4.1) is not used in any concrete target.
The dependency MMMarkdown (~> 0.5) is not used in any concrete target.
The dependency MJExtension (~> 2.5.16) is not used in any concrete target.
The dependency MJRefresh (~> 2.4.12) is not used in any concrete target.
The dependency Masonry (~> 0.6.3) is not used in any concrete target.

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我用的三方库比较多，挺长的，出这个错是告诉我们我们所用的库没有指定target，它不知道用在哪里，所以就给报错了，然后我去了cocoapods的官网看了下，cocoapods官网地址

官网是这样给推荐的：
在创建Podfile的时候，用这种格式使用，

platform :ios, ‘8.0’

use_frameworks!个别需要用到它，比如reactiveCocoa

target ‘MyApp’ do
pod ‘AFNetworking’, ‘~> 2.6’
pod ‘ORStackView’, ‘~> 3.0’
pod ‘SwiftyJSON’, ‘~> 2.3’
end

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里面的 MyApp 记得替换为自己攻城里面的target。这样就基本OK了，执行pod install / pod update 就都可以了。（use_frameworks! 这个是个别需要的，这里修改一下，可以把我上面的代码中的这一行【删除】）

下面是另外一种写法，

platform :ios, ‘8.0’

use_frameworks!个别需要用到它，比如reactiveCocoa

def pods
pod ‘AFNetworking’, ‘~> 2.6’
pod ‘ORStackView’, ‘~> 3.0’
pod ‘SwiftyJSON’, ‘~> 2.3’
end
target ‘MyApp’ do
pods
end