ios - UNIRest objective c Currency Converter Api -

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i trying use currency converter api mashape located @ https://www.mashape.com/ultimate/currency-convert#!

i new objective-c. trying call api through code - 

nsdictionary* headers = @{@"x-mashape-authorization": @"key"}; nsdictionary* parameters = @{@"amt": @"2", @"from": @"usd", @"to": @"inr", @"accuracy": @"2"};  unihttpjsonresponse* response = [[unirest post:^(unisimplerequest* request) {     [request seturl:@"https://exchange.p.mashape.com/exchange/?amt=120&from=usd&to=gbp&accuracy=3&format=json"];     [request setheaders:headers];     [request setparameters:parameters]; }] asjson];

can tell me how can access information returned , how send parameter 2 number instead of string.

thanks help.

it seems mashape's apis not standardized point of taking parameters parameter array - need pass them in seturl call of unihttpjsonresponse object.

also, using async calls when getting data remote api idea.

    nsdictionary* headers = @{@"x-mashape-authorization": @"key"};   [[unirest post:^(unisimplerequest* request) {     [request seturl:@"https://exchange.p.mashape.com/exchange/?amt=120&from=usd&to=gbp&accuracy=3&format=json"]; // want set currencies, amounts, etc.      [request setheaders:headers];     [request setparameters:@{}]; // needed? dunno }] asjsonasync:^(unihttpjsonresponse* response, nserror *error) {     if (error) {         nslog(@"%@",[error localizeddescription]);     } else {          // here stuff want data got.         // launch code deals data :)          nsdictionary *currencyresult = [nsjsonserialization jsonobjectwithdata:[response rawbody] options: 0 error: &error];         nslog(@"%@", currencyresult);     } }];

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