1.错误一： [!] The dependency NIMSDK is not used in any concrete target.
解决：添加如下代码
target "RWTFlickrSearch" do
end
比如：
target "RWTFlickrSearch" do
pod 'SDWebImage', '3.6'
end
2.错误而： [!] Invalid Podfile file: syntax error, unexpected ':', expecting end-of-input
解决：看看是否多出“：”
