使用Objective-C打印多部分/表单数据(POST multipart/form-data with Objective-C/Swift)

 所以这个HTML代码为我提供了正确格式的数据。 
 
<form action="https://www.example.com/register.php" method="post" enctype="multipart/form-data">
    Name: <input type="text" name="userName"><BR />
    Email: <input type="text" name="userEmail"><BR />
    Password: <input type="text" name="userPassword"><BR />
    Avatar: <input type="file" name="avatar"><BR />
    <input type="submit">
</form>
 
 我已经研究了很多关于如何在iOS上进行多部分/表单数据POST的文章，但是没有一个真正解释如果有正常的参数以及文件上传，该怎么办。 
 
 你可以帮助我的代码来发布在Obj-C？ 
 
 谢谢！ 

So this HTML code submits the data in the correct format for me.
 
<form action="https://www.example.com/register.php" method="post" enctype="multipart/form-data">
    Name: <input type="text" name="userName"><BR />
    Email: <input type="text" name="userEmail"><BR />
    Password: <input type="text" name="userPassword"><BR />
    Avatar: <input type="file" name="avatar"><BR />
    <input type="submit">
</form>
 
I've looked into a good number of articles on how to do a multipart/form-data POST on iOS, but none really explain what to do if there were normal parameters as well as the file upload.
 
Could you please help me with the code to POST this in Obj-C?
 
Thanks!

原文：https://stackoverflow.com/questions/24250475