：解决CocoaPods安装时报的问题，http://ruby.taobao.org/latest_specs.4.8.gz 报404
解决 bad response Not Found 404 (http://ruby.taobao.org/latest_specs.4.8.gz)
原因：淘宝停止基于 HTTP 协议的镜像服务 需要改用https的协议
gem sources --remove http://ruby.taobao.org/gem sources -a https://ruby.taobao.org/gem sources -lsudo gem install -n /usr/local/bin cocoapods
当然如果你是第一次安装时（目前网上有些安装资料可能还指向淘宝的http）：
gem sources -lgem sources --remove https://rubygems.org/gem sources -a https://ruby.taobao.org/gem sources -lsudo gem install -n /usr/local/bin cocoapods
2:CocoaPods更新版本后，安装跟更新第三方报错
Update all podsRe-creating CocoaPods due to major version update.Updating local specs repositoriesAnalyzing dependencies[!] The dependency `ReactiveCocoa (~> 2.5)` is not used in any concrete target.The dependency `SDWebImage (~> 3.7.5)` is not used in any concrete target.The dependency `AFNetworking (~> 2.5.4)` is not used in any concrete target.The dependency `Masonry (~> 0.6.4)` is not used in any concrete target.The dependency `JSONModel (~> 1.2.0)` is not used in any concrete target.The dependency `JCAlertView (~> 1.1.5)` is not used in any concrete target.The dependency `RongCloudIMKit (= 2.5.2)` is not used in any concrete target.The dependency `SMPageControl (~> 1.2)` is not used in any concrete target.The dependency `FMDB` is not used in any concrete target.The dependency `GTSDK` is not used in any concrete target.The dependency `BaiduMapKit` is not used in any concrete target.The dependency `UMengAnalytics-NO-IDFA` is not used in any concrete target.The dependency `Fabric` is not used in any concrete target.The dependency `Crashlytics` is not used in any concrete target.The dependency `CocoaLumberjack` is not used in any concrete target.The dependency `TTTAttributedLabel` is not used in any concrete target.The dependency `FLEX` is not used in any concrete target.The dependency `GVUserDefaults` is not used in any concrete target.The dependency `UMengFeedback (~> 2.3.4)` is not used in any concrete target.The dependency `TYAttributedLabel (~> 2.5.6)` is not used in any concrete target.The dependency `IQKeyboardManager` is not used in any concrete target.The dependency `MWPhotoBrowser` is not used in any concrete target.
可以通过 $ pod --version 查看版本号；
原因是podfile升级到最新版本，pod里的内容必须明确指出所用第三方库的target；可以修改Podfile文件的配置文件，让它兼容不指定固定版本；且又不报错；
platform :ios, '7.0'target 'zxptUser’ dopod 'ReactiveCocoa', '~> 2.5'pod 'SDWebImage', '~> 3.7.5'pod 'AFNetworking', '~> 2.5.4'pod 'Masonry', '~> 0.6.4'pod 'JSONModel', '~> 1.2.0'pod 'JCAlertView', '~> 1.1.5'pod 'RongCloudIMKit', '2.5.2' #不要更新此库 源代码已被修改pod 'SMPageControl', '~> 1.2'pod 'FMDB'pod 'GTSDK'pod 'BaiduMapKit' #百度地图SDKpod 'UMengAnalytics-NO-IDFA'#友盟统计无IDFA版SDKpod 'Fabric'pod 'Crashlytics'pod 'CocoaLumberjack'pod 'TTTAttributedLabel'pod 'FLEX'pod 'GVUserDefaults'pod 'UMengFeedback', '~> 2.3.4'pod 'TYAttributedLabel', '~> 2.5.6’pod 'IQKeyboardManager'pod 'MWPhotoBrowser'end
其中zxptUser要换成当前target名，最后不要忘记增加一个end结尾,当然如果你的工程是有多个target都要引用；则要使用link_with（这个一定要放在文件第一行）如下：
link_with ['zxptUser' ,'zxptUser_local', 'zxptUser_AppStore']platform :ios, '7.0'pod 'ReactiveCocoa', '~> 2.5'pod 'SDWebImage', '~> 3.7.5'pod 'AFNetworking', '~> 2.5.4'pod 'Masonry', '~> 0.6.4'pod 'JSONModel', '~> 1.2.0'pod 'JCAlertView', '~> 1.1.5'pod 'RongCloudIMKit', '2.5.2' #不要更新此库 源代码已被修改pod 'SMPageControl', '~> 1.2'pod 'FMDB'pod 'GTSDK'pod 'BaiduMapKit' #百度地图SDKpod 'UMengAnalytics-NO-IDFA'#友盟统计无IDFA版SDKpod 'Fabric'pod 'Crashlytics'pod 'CocoaLumberjack'pod 'TTTAttributedLabel'pod 'FLEX'pod 'GVUserDefaults'pod 'UMengFeedback', '~> 2.3.4'pod 'TYAttributedLabel', '~> 2.5.6’pod 'IQKeyboardManager'pod 'MWPhotoBrowser'
注意基中本工程中有三个target名字，'zxptUser' ,'zxptUser_local', 'zxptUser_AppStore'
3：不同的target引用不同的第三方插件
target :'zxptUser' doplatform :ios pod 'Reachability', '~> 3.0.0' pod 'SBJson', '~> 4.0.0' platform :ios, '7.0' pod 'AFNetworking', '~> 2.0'endtarget :'zxptUser_local' dopod 'OpenUDID', '~> 1.0.0'end
注意每个都要以end结尾
4：删除CocoaPods版本，并安装指定版本
比如我本来安装完CocoaPods 1.0.0版，但发现它实现跟先前还是差别满大的，决定降回0.39这个比较稳定版本；就可以用命令先删除本地的CocoaPods版本，再指定安装特定版本；
a 卸载 cocoapods(它会提示你要删除本地哪个版也可以全删)
sudo gem uninstall cocoapods
b 安装 0.39版本
sudo gem install -n /usr/local/bin cocoapods -v 0.39
5：更新PODS后，报diff: /../Podfile.lock: No such file or directory 错误
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.
如图
解决办法：
查看工程中PROJECT中Configurations中相关配置是否正准，有可能某个分枝指到一个不存在的pods导致；
6：当PODS引入第三方后，项目中引用时发现头文件却显示不存在
排查办法，可以看到相应的targets里面的Build Phases中的Link Binary WithLibraries里面是否有把libPods.a库引入进来
一般出现没有引入进来可能是podFile指定的相应Targets导致其它的Targets没有这个库；
7：友盟最新版SDK调整
a:#import“MobClick.h”引入头文件由原来，更新为：#import "UMMobClick/MobClick.h"
b:初始化配置文件也进行更改，采用UMConfigInstance全局变量设置：
UMConfigInstance.appKey=kUMAnalyticsAppKey; UMConfigInstance.channelId=@"App Store"; [MobClick startWithConfigure:UMConfigInstance];
8：关于融云跟百度地图支持IPV6
融云SDK 从2.5.2开始 百度地图SDK 从3.0.0开始