iOS Determining credit/debit card type

[ct2k7]

Hi all,

I'm making my POS app for a business and I'm currently stuck at one point, identification of the card number entered or swiped into the iPod (yes, I'm using the very same hardware that is used in Apple Stores today).

Now, I'm more fluent in PHP than XCode/iPhone code,C# so given that the information I require is here:

http://stackoverflow.com/questions/1308194/determine-credit-card-type-by-number and http://cuinl.tripod.com/Tips/o-1.htm

how do I code this in XCode?

 

[kainjow]

Xcode is the IDE. I presume you mean "how do I code this in Cocoa?"

Look at the NSString documentation. The methods you want are hasPrefix: and length. The JavaScript code on the stackoverflow.com link could almost be ported line by line to Cocoa.

 

[ct2k7]

Xcode is the IDE. I presume you mean "how do I code this in Cocoa?"

Look at the NSString documentation. The methods you want are hasPrefix: and length. The JavaScript code on the stackoverflow.com link could almost be ported line by line to Cocoa.

I've tried and I'm getting absolutely nowhere with it.

Should I use textField:shouldChangeCharactersInRange:replacementString:?

I'm still going nowhere with that :/

 

[kainjow]

This is pretty basic Cocoa programming stuff... if you're confused here, I suggest picking up a book and start from the beginning. There are threads here that discuss iPhone specific books.