最近要把cocoapods升级到1.1.版本的，按照之前的升级方式，
gem install cocoapods
结果出现了
ERROR: While executing gem ... (Gem::DependencyError)
Unable to resolve dependencies: cocoapods requires cocoapods-core (= 1.1.1), cocoapods-downloader (< 2.0, >= 1.1.2), cocoapods-trunk (< 2.0, >= 1.1.1), xcodeproj (< 2.0, >= 1.3.3)
想了一下，应该要加上路径的，继续
gem install -n /usr/local/bin cocoapods
结果还是同一个错误
ERROR: While executing gem ... (Gem::DependencyError)
Unable to resolve dependencies: cocoapods requires cocoapods-core (= 1.1.1), cocoapods-downloader (< 2.0, >= 1.1.2), cocoapods-trunk (< 2.0, >= 1.1.1), xcodeproj (< 2.0, >= 1.3.3)
再想了一下，应该先更新system，这次要加上sudo，sudo是获得系统权限
sudo gem update --system
好了，更新成功，提示好长一串东西，这里就不写出来了。
再一次去升级cocoapods，记住，还是要加上sudo。
sudo gem install -n /usr/local/bin cocoapods
出现这些但不限于这些，即为升级成功
Fetching: nanaimo-0.2.3.gem (100%)
Successfully installed nanaimo-0.2.3
Fetching: claide-1.0.1.gem (100%)
Successfully installed claide-1.0.1
Fetching: CFPropertyList-2.3.4.gem (100%)
Successfully installed CFPropertyList-2.3.4
Fetching: xcodeproj-1.4.1.gem (100%)
Successfully installed xcodeproj-1.4.1
Fetching: molinillo-0.5.4.gem (100%)
查看了一下版本
pod --version
是1.1.1
1.png
OK！
