这种问题是afn解析json 遇到特殊字符,解析失败
"空格键" ==>字符串后面并没有通过 空格 联接其它内容,所以就解析失败;
如地址:北京市海淀区大钟寺天兰奥特莱 "后面根着空格 "
Error Domain=NSCocoaErrorDomain Code=3840 "Unescaped control character around character 16650." UserInfo={NSDebugDescription=Unescaped control character around character 16650.}