iOS in-app purchases

In-app purchases for IOS

Brief introduction

In-app purchases are applications used to purchase additional content or upgrade features.

The instance step

1. Make sure you have a unique app ID (unique App ID) in your iTunes connection, and when you create a bundled ID application update, the code is signed on Xcode with the appropriate profile

2. Create new applications and update application information. You can learn more about it in Apple's Add New App documentation

3. Add new products for in-app payments in the Management App Purchase of the app page

4. Make sure to set up the application for the bank in detail. I t needs to be set up for in-app purchases. Also use the Manage Users option in iTunes to create a page that tests user accounts to connect to your application.

5. The next step is to work with the code and create the UI for our in-app purchases.

6. Create a single view application and enter the bundle identifier in the identifier connection specified in iTunes

7. Update ViewController.xib, as shown below

8. Create IBOutlets for the three labels and name the buttons productTitleLabel, productDescriptionLabel, productPriceLabel, and purchaseButton

9. Select the project file, then select the target, and then add StoreKit.framework

10. Update ViewController.h, as shown below

#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

11. Update the ViewController .m, as shown below

#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.center = self.view.center;
    [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

Note: You need to modify the kTutorialPoint ProductID that you created for In-App Pur (in-app purchase). By modifying the NSSet of the FetchAvailableProducts product identifier, you can add multiple products.

Output

Run the application and the output is as follows

Make sure you're signed in. C lick Buy to select an existing Apple ID. E nter the username and password for a valid test account. After a few seconds, the following information is displayed

Once the product has been successfully purchased, the following information will be obtained. You can update the code related to the app's functionality where this information is displayed