//1.如何安装cocoapods 首先打开终端： 1==> gem sources --remove https://rubygems.org/ 打印结果：source https://rubygems.org/ not present in cache 2==》 gem sources -a https://ruby.taobao.org/ （找到淘宝镜像） 打印结果：https://ruby.taobao.org/ added to sources 3==》 gem sources -l 打印结果：*** CURRENT SOURCES *** https://ruby.taobao.org/ 4==》sudo gem install cocoapods（开始安装cocoapods） 这是你需要输入密码（这里需要注意密码是不会显示出来的，无需在意，输完即可，等一分钟左右一般就安装成功了） 打印信息如下： Fetching: i18n-0.7.0.gem (100%) Successfully installed i18n-0.7.0 Fetching: thread_safe-0.3.5.gem (100%) Successfully installed thread_safe-0.3.5 Fetching: tzinfo-1.2.2.gem (100%) Successfully installed tzinfo-1.2.2 Fetching: minitest-5.8.3.gem (100%) Successfully installed minitest-5.8.3 Fetching: activesupport-4.2.5.gem (100%) Successfully installed activesupport-4.2.5 Fetching: nap-1.0.0.gem (100%) Successfully installed nap-1.0.0 Fetching: fuzzy_match-2.0.4.gem (100%) Successfully installed fuzzy_match-2.0.4 Fetching: cocoapods-core-0.39.0.gem (100%) Successfully installed cocoapods-core-0.39.0 Fetching: claide-0.9.1.gem (100%) Successfully installed claide-0.9.1 Fetching: colored-1.2.gem (100%) Successfully installed colored-1.2 Fetching: xcodeproj-0.28.2.gem (100%) Successfully installed xcodeproj-0.28.2 Fetching: cocoapods-downloader-0.9.3.gem (100%) Successfully installed cocoapods-downloader-0.9.3 Fetching: cocoapods-plugins-0.4.2.gem (100%) Successfully installed cocoapods-plugins-0.4.2 Fetching: cocoapods-search-0.1.0.gem (100%) Successfully installed cocoapods-search-0.1.0 Fetching: cocoapods-stats-0.6.2.gem (100%) Successfully installed cocoapods-stats-0.6.2 Fetching: cocoapods-try-0.5.1.gem (100%) Successfully installed cocoapods-try-0.5.1 Fetching: netrc-0.7.8.gem (100%) Successfully installed netrc-0.7.8 Fetching: cocoapods-trunk-0.6.4.gem (100%) Successfully installed cocoapods-trunk-0.6.4 Fetching: molinillo-0.4.0.gem (100%) Successfully installed molinillo-0.4.0 Fetching: escape-0.0.4.gem (100%) Successfully installed escape-0.0.4 Fetching: cocoapods-0.39.0.gem (100%) Successfully installed cocoapods-0.39.0 Parsing documentation for i18n-0.7.0 Installing ri documentation for i18n-0.7.0 Parsing documentation for thread_safe-0.3.5 Installing ri documentation for thread_safe-0.3.5 Parsing documentation for tzinfo-1.2.2 Installing ri documentation for tzinfo-1.2.2 Parsing documentation for minitest-5.8.3 Installing ri documentation for minitest-5.8.3 Parsing documentation for activesupport-4.2.5 unable to convert "x84" from ASCII-8BIT to UTF-8 for lib/active_support/values/unicode_tables.dat, skipping Installing ri documentation for activesupport-4.2.5 Parsing documentation for nap-1.0.0 Installing ri documentation for nap-1.0.0 Parsing documentation for fuzzy_match-2.0.4 Installing ri documentation for fuzzy_match-2.0.4 Parsing documentation for cocoapods-core-0.39.0 Installing ri documentation for cocoapods-core-0.39.0 Parsing documentation for claide-0.9.1 Installing ri documentation for claide-0.9.1 Parsing documentation for colored-1.2 Installing ri documentation for colored-1.2 Parsing documentation for xcodeproj-0.28.2 Installing ri documentation for xcodeproj-0.28.2 Parsing documentation for cocoapods-downloader-0.9.3 Installing ri documentation for cocoapods-downloader-0.9.3 Parsing documentation for cocoapods-plugins-0.4.2 Installing ri documentation for cocoapods-plugins-0.4.2 Parsing documentation for cocoapods-search-0.1.0 Installing ri documentation for cocoapods-search-0.1.0 Parsing documentation for cocoapods-stats-0.6.2 Installing ri documentation for cocoapods-stats-0.6.2 Parsing documentation for cocoapods-try-0.5.1 Installing ri documentation for cocoapods-try-0.5.1 Parsing documentation for netrc-0.7.8 Installing ri documentation for netrc-0.7.8 Parsing documentation for cocoapods-trunk-0.6.4 Installing ri documentation for cocoapods-trunk-0.6.4 Parsing documentation for molinillo-0.4.0 Installing ri documentation for molinillo-0.4.0 Parsing documentation for escape-0.0.4 Installing ri documentation for escape-0.0.4 Parsing documentation for cocoapods-0.39.0 Installing ri documentation for cocoapods-0.39.0 21 gems installed 5==》 我们来使用： pod search AFNetworking