CocoaPods/Specs国内镜像,5分钟同步一次。用法:将“source 'https://git.oschina.net/shannon/CocoaPods-Specs-mirror.git'” 添加到 Podfile 首行。 Mirror of CocoaPods/Specs, synchronize every 5 minutes。Usage: Add "source 'https://git.oschina.net/shannon/CocoaPods-Specs-mirror.git'" to the first line of Podfile.