AFN设置请求超时时间

进入AFURLRequestSerialization.m 找到 - (NSMutableURLRequest *)requestWithMethod:(NSString *)method URLString:(NSString *)URLString  parameters:(id)parameters error:(NSError *__autoreleasing *)error 方法，在mutableRequest.HTTPMethod = method的下面添加mutableRequest.timeoutInterval = 你想设定的时间;