使用动态数据进行JSON解析

Question

Hey Everyone, My problem is,I want to parse this string using JSON
http://rate-exchange.appspot.com/currency?from=USD&to=EUR

but this is static that is it would convert from USD to EUR but what I want is the first parameter should be the one selected in first textField and the second from the second one.So that i can pass the commonISOCurrencyCodes(from the parameters selected in TF), to that string and get the result on click of a button on the Result TextField.

Answer 1

Just as simple as:

NSString* fromCode = // from
NSString* toCode = // to
NSString* urlString = [NSString stringWithFormat:@"http://rate-exchange.appspot.com/currency?from=%@&to=%@", fromCode, toCode];