Question

我在我的应用中有一个应用内购买用于移除广告横幅，当我成功购买并返回到我的主视图控制器时，广告未被删除但是当我退出应用并重新打开时，广告已经消失并且不复存在。几乎就像它记得我已经在下次加载时购买了移除广告IAP，但是在购买后没有购买。一个非常聪明的人告诉我，我需要这样做：

所以现在你所要做的就是调用位于的代码 viewWillAppear / viewDidLoad方法一旦返回VC后购买IAP。你如何做到这一点取决于你。如果你需要帮助因为这个评论，我建议问一个新问题线程越来越长。如果你赞成我的回答，我会很感激并选择它作为正确的答案，因为我帮助你得到了这个工作

关于如何做到这一点的任何想法？

谢谢！

以下是我的主视图控制器的屏幕截图：

ViewController.h

#import <UIKit/UIKit.h>
#import <StoreKit/StoreKit.h>
#import <CoreMotion/CoreMotion.h>
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>


@interface ViewController : UIViewController <UIWebViewDelegate, MKMapViewDelegate, CLLocationManagerDelegate>

@property (strong, nonatomic) IBOutlet UIWebView *viewWeb;
@property (nonatomic, strong) CLLocationManager *locationManager;
@property (nonatomic, strong) CLLocation *currentLocation;
@property (weak, nonatomic) IBOutlet UIImageView *PokeABowlAd;


@end

ViewController.m：

#define SHOW_ADS_KEY @"Show Ads Key"
#define k_Save @"Saveitem"


#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>

@interface ViewController () <UITextViewDelegate>


@end

@implementation ViewController

@synthesize viewWeb;

- (void)viewDidLoad {
[super viewDidLoad];

UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
[self.navigationItem setBackBarButtonItem:backButtonItem];


NSString *fullURL = @"https://www.google.com";
NSURL *url = [NSURL URLWithString:fullURL];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
viewWeb.scalesPageToFit = YES;
viewWeb.scrollView.bounces = NO;
[viewWeb loadRequest:requestObj];
}

#pragma mark - CLLocationManagerDelegate
// Wait for location callbacks
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
NSLog(@"%@", [locations lastObject]);
}

-(void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {

if (event.type == UIEventSubtypeMotionShake) {
    NSString *jsString = [NSString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:@"iitc" withExtension:@"js"] encoding:NSUTF8StringEncoding error:nil];
    [viewWeb stringByEvaluatingJavaScriptFromString:jsString];
}
}



- (NSUInteger)supportedInterfaceOrientations {
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
    return UIInterfaceOrientationMaskAllButUpsideDown;
} else {
    return UIInterfaceOrientationMaskAll;
}
}


- (IBAction)PokeABowlAd:(id)sender {
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_ADS_KEY]  isEqualToString: @"No"]){ // NEW CODE
    // Code to show ads
    _PokeABowlAd.hidden = NO;

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString: @"http://www.pokeabowl.com/"]];
} else {
    _PokeABowlAd.hidden = YES;
}
NSLog(@"Shows ads?: %@", [[NSUserDefaults standardUserDefaults] objectForKey:SHOW_ADS_KEY]);

}

- (void)viewWillAppear {
if (![[[NSUserDefaults standardUserDefaults] objectForKey:SHOW_ADS_KEY] isEqualToString: @"No"]){ // NEW CODE
    // Code to show ads
    _PokeABowlAd.hidden = NO;

} else {
    _PokeABowlAd.hidden = YES;
}
NSLog(@"Shows ads?: %@", [[NSUserDefaults standardUserDefaults] objectForKey:SHOW_ADS_KEY]);
}


@end

MasterViewController.m：

    #import "MasterViewController.h"
#import "DetailViewController.h"
#import "RageIAPHelper.h"
#import <StoreKit/StoreKit.h>

@interface MasterViewController () {
NSArray *_products;
NSNumberFormatter * _priceFormatter;
}
@end

@implementation MasterViewController

- (void)viewDidLoad
{
[super viewDidLoad];

UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
[self.navigationItem setBackBarButtonItem:backButtonItem];

self.title = @"Settings";

self.refreshControl = [[UIRefreshControl alloc] init];
[self.refreshControl addTarget:self action:@selector(reload) forControlEvents:UIControlEventValueChanged];
[self reload];
[self.refreshControl beginRefreshing];

_priceFormatter = [[NSNumberFormatter alloc] init];
[_priceFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
[_priceFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Restore" style:UIBarButtonItemStylePlain target:self action:@selector(restoreTapped:)];

}

- (void)restoreTapped:(id)sender {
[[RageIAPHelper sharedInstance] restoreCompletedTransactions];
}

- (void)viewWillAppear:(BOOL)animated {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(productPurchased:) name:IAPHelperProductPurchasedNotification object:nil];
}

- (void)viewWillDisappear:(BOOL)animated {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)productPurchased:(NSNotification *)notification {

NSString * productIdentifier = notification.object;
[_products enumerateObjectsUsingBlock:^(SKProduct * product, NSUInteger idx, BOOL *stop) {
    if ([product.productIdentifier isEqualToString:productIdentifier]) {
        [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:idx inSection:0]] withRowAnimation:UITableViewRowAnimationFade];
        *stop = YES;
    }
}];

}

- (void)reload {
_products = nil;
[self.tableView reloadData];
[[RageIAPHelper sharedInstance] requestProductsWithCompletionHandler:^(BOOL success, NSArray *products) {
    if (success) {
        _products = products;
        [self.tableView reloadData];
    }
    [self.refreshControl endRefreshing];
}];
}

#pragma mark - Table View

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return _products.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

SKProduct * product = (SKProduct *) _products[indexPath.row];
cell.textLabel.text = product.localizedTitle;
[_priceFormatter setLocale:product.priceLocale];
cell.detailTextLabel.text = [_priceFormatter stringFromNumber:product.price];

if ([[RageIAPHelper sharedInstance] productPurchased:product.productIdentifier]) {
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
    cell.accessoryView = nil;
} else {
    UIButton *buyButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    buyButton.frame = CGRectMake(0, 0, 72, 37);
    [buyButton setTitle:@"Buy" forState:UIControlStateNormal];
    buyButton.tag = indexPath.row;
    [buyButton addTarget:self action:@selector(buyButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    cell.accessoryType = UITableViewCellAccessoryNone;
    cell.accessoryView = buyButton;
}

return cell;
}

- (void)buyButtonTapped:(id)sender {

UIButton *buyButton = (UIButton *)sender;
SKProduct *product = _products[buyButton.tag];

NSLog(@"Buying %@...", product.productIdentifier);
[[RageIAPHelper sharedInstance] buyProduct:product];

}

@end

IAPHelper.h：

    #import <StoreKit/StoreKit.h>


UIKIT_EXTERN NSString *const IAPHelperProductPurchasedNotification;

typedef void (^RequestProductsCompletionHandler)(BOOL success, NSArray * products);

@interface IAPHelper : NSObject

- (id)initWithProductIdentifiers:(NSSet *)productIdentifiers;
- (void)requestProductsWithCompletionHandler:(RequestProductsCompletionHandler)completionHandler;
- (void)buyProduct:(SKProduct *)product;
- (BOOL)productPurchased:(NSString *)productIdentifier;
- (void)restoreCompletedTransactions;
@property (weak, nonatomic) IBOutlet UIImageView *PokeABowlAd;

@end

IAPHelper.m：

    #define SHOW_ADS_KEY @"Show Ads Key"

// 1
#import "IAPHelper.h"
#import <StoreKit/StoreKit.h>

NSString *const IAPHelperProductPurchasedNotification = @"IAPHelperProductPurchasedNotification";

// 2
@interface IAPHelper () <SKProductsRequestDelegate, SKPaymentTransactionObserver>
@end

// 3
@implementation IAPHelper {
SKProductsRequest * _productsRequest;
RequestProductsCompletionHandler _completionHandler;

NSSet * _productIdentifiers;
NSMutableSet * _purchasedProductIdentifiers;
}




- (id)initWithProductIdentifiers:(NSSet *)productIdentifiers {

if ((self = [super init])) {

    // Store product identifiers
    _productIdentifiers = productIdentifiers;

    // Check for previously purchased products
    _purchasedProductIdentifiers = [NSMutableSet set];
    for (NSString * productIdentifier in _productIdentifiers) {
        BOOL productPurchased = [[NSUserDefaults standardUserDefaults]     boolForKey:productIdentifier];
        if (productPurchased) {
            [_purchasedProductIdentifiers addObject:productIdentifier];
            NSLog(@"Previously purchased: %@", productIdentifier);
            // NEW CODE
            if ([productIdentifier isEqualToString:@"Ads"]){
                [[NSUserDefaults standardUserDefaults] setObject: @"No" forKey:SHOW_ADS_KEY];
                [[NSUserDefaults standardUserDefaults] synchronize];
            }
            // NEW CODE ^^

        } else {
            NSLog(@"Not purchased: %@", productIdentifier);
        }
    }

    // Add self as transaction observer
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
}
return self;
}


- (void)requestProductsWithCompletionHandler:(RequestProductsCompletionHandler)completionHandler {


// 1
_completionHandler = [completionHandler copy];

// 2
_productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:_productIdentifiers];
_productsRequest.delegate = self;
[_productsRequest start];

}

- (BOOL)productPurchased:(NSString *)productIdentifier {
return [_purchasedProductIdentifiers containsObject:productIdentifier];
}

- (void)buyProduct:(SKProduct *)product {

NSLog(@"Buying %@...", product.productIdentifier);

SKPayment * payment = [SKPayment paymentWithProduct:product];
[[SKPaymentQueue defaultQueue] addPayment:payment];

}

#pragma mark - SKProductsRequestDelegate

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

NSLog(@"Loaded list of products...");
_productsRequest = nil;

NSArray * skProducts = response.products;
for (SKProduct * skProduct in skProducts) {
    NSLog(@"Found product: %@ %@ %0.2f",
          skProduct.productIdentifier,
          skProduct.localizedTitle,
          skProduct.price.floatValue);
}

_completionHandler(YES, skProducts);
_completionHandler = nil;

}

- (void)request:(SKRequest *)request didFailWithError:(NSError *)error {

NSLog(@"Failed to load list of products.");
_productsRequest = nil;

_completionHandler(NO, nil);
_completionHandler = nil;

}

#pragma mark SKPaymentTransactionOBserver

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
for (SKPaymentTransaction * transaction in transactions) {
    switch (transaction.transactionState)
    {
        case SKPaymentTransactionStatePurchased:
            [self completeTransaction:transaction];
            break;
        case SKPaymentTransactionStateFailed:
            [self failedTransaction:transaction];
            break;
        case SKPaymentTransactionStateRestored:
            [self restoreTransaction:transaction];
        default:
            break;
    }
};
}

- (void)completeTransaction:(SKPaymentTransaction *)transaction {
NSLog(@"completeTransaction...");

[self provideContentForProductIdentifier:transaction.payment.productIdentifier];
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
}

- (void)restoreTransaction:(SKPaymentTransaction *)transaction {
NSLog(@"restoreTransaction...");

[self provideContentForProductIdentifier:transaction.originalTransaction.payment.productIdentifier];
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
}

- (void)failedTransaction:(SKPaymentTransaction *)transaction {

NSLog(@"failedTransaction...");
if (transaction.error.code != SKErrorPaymentCancelled)
{
    NSLog(@"Transaction error: %@", transaction.error.localizedDescription);
}

[[SKPaymentQueue defaultQueue] finishTransaction: transaction];
}

- (void)provideContentForProductIdentifier:(NSString *)productIdentifier {

[_purchasedProductIdentifiers addObject:productIdentifier];
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:productIdentifier];
[[NSUserDefaults standardUserDefaults] synchronize];
[[NSNotificationCenter defaultCenter] postNotificationName:IAPHelperProductPurchasedNotification object:productIdentifier userInfo:nil];

}

- (void)restoreCompletedTransactions {
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}

@end

RageIAPHelper.h

    #import "IAPHelper.h"

@interface RageIAPHelper : IAPHelper

+ (RageIAPHelper *)sharedInstance;

@end

RageIAPHelper.m

    #import "RageIAPHelper.h"
#import "ViewController.h"

@implementation RageIAPHelper

+ (RageIAPHelper *)sharedInstance {
static dispatch_once_t once;
static RageIAPHelper * sharedInstance;
dispatch_once(&once, ^{
    NSSet * productIdentifiers = [NSSet setWithObjects:
                                  @“com.GPS.iapra",
                                  @"com.GPS.iapb”,
                                  nil];
    sharedInstance = [[self alloc] initWithProductIdentifiers:productIdentifiers];
});
return sharedInstance;
}

@end

购买应用内购买后保存更改

0 个答案: