unknown type name‘nsstring’ declaration of 'protocol'must be imported from module'objectiveC.runtime'before it is required

导入第三方框架报错
expected identifier or'('

unknown type name‘nsstring’

declaration of 'protocol'must be imported from module'objectiveC.runtime'before it is required

屏幕快照 2016-10-05 23.39.36.png

解决办法

参考 http://blog.csdn.net/cloud_pro/article/details/51074391