ASCII eqivalent of the symbol ampersand (&) in Obj C

I am sending emails from my iPhone app by calling a web service and in the email body I need to send a URL that contains an ampersand symbol (&). If I use the symbol in my URL the web service does not send the email, but if I remove that ampersand symbol everything works and the webservice sends the email just fine. So my question is, should I use the ASCII eqiva开发者_如何学Pythonlent of that symbol ? And if so, what is the ASCII eqivalent for '&'? Can any one help me?

This is my URL which has the ampersand symbol

http://xx.xxx.1.xx/xxx/aspxapprvcontrct.aspx?PartyEMail=xx@xxxx.com&devid= 1xx23

Thanks in advance.

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You need to escape the whole string (email body) you are sending to your webservice. This question has been asked before on SO, see the link included below. I got it from the link @Caleb included, which in and of itself does not solve your particular problem. I would recommend looking at the second answer posted by @Michael Waterfall.

Objective C HTML escape/unescape