//我们对ulr进行下面的设置就可以了
NSString *url = [NSString stringWithFormat:@"http://api.zhuishushenqi.com/book/accurate-search?author=%@",sender.titleLabel.text];
NSString *newUrl = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
找了半天的代码框编辑，原来我一直是用的富文本，终于在设置里面找到了Markdown设置
设置如图
