(Objective-C) HTTP POST JSON and Parse JSON Response

Demonstrates how to send a JSON POST and then parse the JSON response.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoHttpResponse.h>
#import <NSString.h>

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoJsonObject *json = [[CkoJsonObject alloc] init];

BOOL success = [json LoadFile: @"qa_data/json/jsonBodyForHttpPost.json"];
if (success != YES) {
    NSLog(@"%@",json.LastErrorText);
    return;
}

CkoHttp *http = [[CkoHttp alloc] init];

CkoHttpResponse *resp = [http PostJson2: @"https://test.something.com/XYZ/API/v1/CreditInsuranceCalculator/CalculatePremiums" contentType: @"application/json" jsonText: [json Emit]];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

CkoJsonObject *jsonResp = [[CkoJsonObject alloc] init];
[jsonResp Load: resp.BodyStr];

jsonResp.EmitCompact = NO;
NSLog(@"%@",[jsonResp Emit]);

// The JSON response to be parsed looks like this:
// {
//   "LifeAmount": 513.85,
//   "LifeResidualAmount": 123.38,
//   "CriticalIllnessAmount": 0,
//   "CriticalIllnessResidualAmount": 0,
//   "DisabilityAmount": 881.70,
//   "PolicyFee": 0.00,
//   "PolicyFeeSecondary": 0,
//   "PolicyFeeHidden": 50.00,
//   "PolicyFeeHiddenSecondary": 0
// }

// We can get the floating point numbers as strings.  Then convert to double
// using the appropriate string-to-double conversion for your programming language.
// For example, in C++ use atof.  In C# use Convert.ToDouble.  
NSString *lifeAmount = [jsonResp StringOf: @"LifeAmount"];
NSString *lifeResidualAmount = [jsonResp StringOf: @"LifeResidualAmount"];

NSLog(@"%@%@",@"LifeAmount = ",lifeAmount);
NSLog(@"%@%@",@"LifeResidualAmount = ",lifeResidualAmount);