iOS - iOS - In-App Purchase

iOS - In-App Purchase

In-App purchase is used to purchase additional content or upgrade features with respect to an application.

Steps Involved

Step 1. In iTunes connect, ensure that you have a unique App ID and when we create the application update with the bundle ID and code signing in Xcode with corresponding provisioning profile.
Step 2. Create a new application and update application information. You can know more about this in apple's Add new apps documentation.
Step 3. Add a new product for in-app purchase in Manage In-App Purchase of your application's page.
Step 4. Ensure you setup the bank details for your application. This needs to be setup for In-App purchase to work. Also, create a test user account using Manage Users option in iTunes connect page of your app.
Step 5. The next steps are related to handling code and creating UI for our In-App purchase.
Step 6. Create a single view application and enter the bundle identifier is the identifier specified in iTunes connect.
Step 7. Update the ViewController.xib as shown below âˆ'

Step 8. Create IBOutlets for the three labels and the button naming them as productTitleLabel, productDescriptionLabel, productPriceLabel and purchaseButton respectively.
Step 9. Select your project file, then select targets and then add StoreKit.framework.
Step 10. Update ViewController.h as follows âˆ'
  #import <UIKit/UIKit.h>  #import <StoreKit/StoreKit.h>    @interface ViewController : UIViewController<  SKProductsRequestDelegate,SKPaymentTransactionObserver>  {      SKProductsRequest *productsRequest;      NSArray *validProducts;      UIActivityIndicatorView *activityIndicatorView;      IBOutlet UILabel *productTitleLabel;      IBOutlet UILabel *productDescriptionLabel;      IBOutlet UILabel *productPriceLabel;      IBOutlet UIButton *purchaseButton;  }  - (void)fetchAvailableProducts;  - (BOOL)canMakePurchases;  - (void)purchaseMyProduct:(SKProduct*)product;  - (IBAction)purchase:(id)sender;    @end  
Step 11. Update ViewController.m as follows âˆ'
  #import "ViewController.h"  #define kTutorialPointProductID   @"com.tutorialPoints.testApp.testProduct"    @interface ViewController ()    @end    @implementation ViewController    - (void)viewDidLoad  {      [super viewDidLoad];      // Adding activity indicator      activityIndicatorView = [[UIActivityIndicatorView alloc]      initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; =;      [activityIndicatorView hidesWhenStopped];      [self.view addSubview:activityIndicatorView];      [activityIndicatorView startAnimating];      //Hide purchase button initially      purchaseButton.hidden = YES;      [self fetchAvailableProducts];      }    - (void)didReceiveMemoryWarning  {      [super didReceiveMemoryWarning];      // Dispose of any resources that can be recreated.  }    -(void)fetchAvailableProducts{      NSSet *productIdentifiers = [NSSet       setWithObjects:kTutorialPointProductID,nil];      productsRequest = [[SKProductsRequest alloc]       initWithProductIdentifiers:productIdentifiers];      productsRequest.delegate = self;      [productsRequest start];  }    - (BOOL)canMakePurchases  {      return [SKPaymentQueue canMakePayments];  }  - (void)purchaseMyProduct:(SKProduct*)product{      if ([self canMakePurchases]) {          SKPayment *payment = [SKPayment paymentWithProduct:product];          [[SKPaymentQueue defaultQueue] addTransactionObserver:self];          [[SKPaymentQueue defaultQueue] addPayment:payment];      }      else{          UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:          @"Purchases are disabled in your device" message:nil delegate:          self cancelButtonTitle:@"Ok" otherButtonTitles: nil];          [alertView show];      }  }  -(IBAction)purchase:(id)sender{      [self purchaseMyProduct:[validProducts objectAtIndex:0]];      purchaseButton.enabled = NO;   }    #pragma mark StoreKit Delegate    -(void)paymentQueue:(SKPaymentQueue *)queue    updatedTransactions:(NSArray *)transactions {      for (SKPaymentTransaction *transaction in transactions) {          switch (transaction.transactionState) {              case SKPaymentTransactionStatePurchasing:                      NSLog(@"Purchasing");                  break;                              case SKPaymentTransactionStatePurchased:                 if ([transaction.payment.productIdentifier                     isEqualToString:kTutorialPointProductID]) {                     NSLog(@"Purchased ");                     UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:                     @"Purchase is completed succesfully" message:nil delegate:                     self cancelButtonTitle:@"Ok" otherButtonTitles: nil];                     [alertView show];                  }                                 [[SKPaymentQueue defaultQueue] finishTransaction:transaction];                  break;                              case SKPaymentTransactionStateRestored:                                 NSLog(@"Restored ");                                 [[SKPaymentQueue defaultQueue] finishTransaction:transaction];                  break;                              case SKPaymentTransactionStateFailed:                  NSLog(@"Purchase failed ");                  break;              default:                  break;          }      }  }    -(void)productsRequest:(SKProductsRequest *)request    didReceiveResponse:(SKProductsResponse *)response  {      SKProduct *validProduct = nil;      int count = [response.products count];      if (count>0) {          validProducts = response.products;          validProduct = [response.products objectAtIndex:0];          if ([validProduct.productIdentifier              isEqualToString:kTutorialPointProductID]) {              [productTitleLabel setText:[NSString stringWithFormat:              @"Product Title: %@",validProduct.localizedTitle]];              [productDescriptionLabel setText:[NSString stringWithFormat:              @"Product Desc: %@",validProduct.localizedDescription]];              [productPriceLabel setText:[NSString stringWithFormat:              @"Product Price: %@",validProduct.price]];                     }              } else {          UIAlertView *tmp = [[UIAlertView alloc]                              initWithTitle:@"Not Available"                              message:@"No products to purchase"                              delegate:self                              cancelButtonTitle:nil                              otherButtonTitles:@"Ok", nil];          [tmp show];      }          [activityIndicatorView stopAnimating];      purchaseButton.hidden = NO;  }    @end  


You have to update kTutorialPointProductID to the productID you have created for your In-App Purchase. You can add more than one product by updating the productIdentifiers's NSSet in fetchAvailableProducts. Similary, handle the purchase related actions for product IDs you add.

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