iOS in app purchase (iap) objective-c

ViewController.h

ViewController.m

//

//  ViewController.h

//  iaptest

//

//  Created by smilejsu on 2015. 8. 12..

//  Copyright (c) 2015년 smilejsu. All rights reserved.

//

#import <UIKit/UIKit.h>

#import <Storekit/StoreKit.h>

@interface ViewController : UIViewController <SKProductsRequestDelegate, SKPaymentTransactionObserver>{

}

@property int coinAmount;

@property (strong, nonatomic) SKProduct *product;

@property (weak, nonatomic) IBOutlet UILabel *labelCoinAmount;

- (IBAction)BuyCoin:(id)sender;

- (void) getProductInfo;

- (void) validateReceipt;

- (void) increaseCoin;

@end

//

//  ViewController.m

//  iaptest

//

//  Created by smilejsu on 2015. 8. 12..

//  Copyright (c) 2015년 smilejsu. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];

    

    [self getProductInfo];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

-(void) productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {

    if( response.products.count != 0 ){

        _product = (SKProduct*)response.products[0];

    }

}

-(void) paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {

    for( SKPaymentTransaction *transaction in transactions ){

        switch (transaction.transactionState) {

            case SKPaymentTransactionStatePurchased:

                [self increaseCoin];

                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                break;

                

            case SKPaymentTransactionStateRestored:

                [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];

                break;

                

            case SKPaymentTransactionStateFailed:

                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                break;

                

            default:

                break;

        }

    }

}

- (IBAction)BuyCoin:(id)sender {

    SKPayment *payment = [SKPayment paymentWithProduct:_product];

    [[SKPaymentQueue defaultQueue] addPayment:payment];

}

- (void) getProductInfo {

    if( [SKPaymentQueue canMakePayments] ){

        

        NSSet *productID = [NSSet setWithObject:@"smilejsu.iap.coinpack"];

        

        SKProductsRequest * request = [[SKProductsRequest alloc] initWithProductIdentifiers: productID];

        

        request.delegate = self;

        

        [request start];

    }

}

-(void) increaseCoin {

    _coinAmount += 50;

    _labelCoinAmount.text = [NSString stringWithFormat:@"%d", _coinAmount];

    

    [self validateReceipt];

}

-(void) validateReceipt {

    // Load the receipt from the app bundle.

    NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];

    NSData *receipt = [NSData dataWithContentsOfURL:receiptURL];

    if (!receipt) { /* No local receipt -- handle the error. */ }

    

    /* ... Send the receipt data to your server ... */

    NSLog(@"Send the receipt data to your server");

    

    // Create the JSON object that describes the request

    NSError *error;

    NSDictionary *requestContents = @{

                                      @"receipt-data": [receipt base64EncodedStringWithOptions:0]

                                      };

    NSData *requestData = [NSJSONSerialization dataWithJSONObject:requestContents

                                                          options:0

                                                            error:&error];

    

    if (!requestData) { /* ... Handle error ... */ }

    

    // Create a POST request with the receipt data.

    // https://sandbox.itunes.apple.com/verifyReceipt , https://buy.itunes.apple.com/verifyReceipt

    NSURL *storeURL = [NSURL URLWithString:@"https://sandbox.itunes.apple.com/verifyReceipt"];

    NSMutableURLRequest *storeRequest = [NSMutableURLRequest requestWithURL:storeURL];

    [storeRequest setHTTPMethod:@"POST"];

    [storeRequest setHTTPBody:requestData];

    

    

    // Make a connection to the iTunes Store on a background queue.

    NSOperationQueue *queue = [[NSOperationQueue alloc] init];

    

    [NSURLConnection sendAsynchronousRequest:storeRequest queue:queue

                           completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

                               if (connectionError) {

                                   /* ... Handle error ... */

                               } else {

                                   NSError *error;

                                   NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];

                                   if (!jsonResponse) { /* ... Handle error ...*/ }

                                   /* ... Send a response back to the device ... */

                                   

                                   NSLog(@"%@", jsonResponse);

                                   

                               }

                           }];

    

}

@end