应用程序内购买产品ID更新一个在后面

Question

我有一个快速的问题在我的应用程序内购买一个奇怪的故障设置：

我ViewController有2个按钮：一个和乙。当用户点击其中一个按钮时，我将我的productID设置为所选项目。然后我有一个购买按钮，用户应该点击购买该项目。 问题我的是，我似乎无法得到SKProductRequest以正确的项目启动productsRequest方法。

换句话说，苹果的productRequest总是滞后于正确的产品1。这里是我的代码，我已经实现了：

ViewController.h

#import <UIKit/UIKit.h> 
#import <StoreKit/StoreKit.h> 

@interface ViewController : UIViewController <SKPaymentTransactionObserver, SKProductsRequestDelegate> 

/// In app purchase crap 
@property (strong, nonatomic) SKProduct *product; 
@property (strong, nonatomic) SKProductsRequest *request; 
@property (retain, nonatomic) NSString *productID; 

@end 

ViewController.m

#import "ViewController.h" 

@interface ViewController() 

@end 

@implementation ViewController 

int start; 

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    // Attempt to get request aligned with item selected.. :\ 
    start = YES; 
    _productID = @"com.example.IAP.itemA"; 

    [self Buy:self]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 

- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 




- (IBAction)Buy:(id)sender { 

// Check for user to be able to make payment 
    if ([SKPaymentQueue canMakePayments]) { 
     _request = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:_productID]]; 
     _request.delegate = self; 

     [_request start]; 
    } else { 
     NSLog(@"Please enable In App Purchasing in your settings"); 
    } 
} 



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

    NSArray *products = response.products; 

    if (products.count != 0) { 
     NSLog(@"Products available: %@", _product.localizedTitle); 
     _product = products[0]; 
     if (start != YES) { 
      [self beginPaymentQueue]; 
     } 
     else { 
      start = NO; 
     } 
    } else { 
     NSLog(@"Products not found."); 
    } 

    products = response.invalidProductIdentifiers; 

    for (SKProduct *product in products) { 
     NSLog(@"Product not found: %@", product); 
    } 
} 

- (void)beginPaymentQueue {    
    SKPayment *payment = [SKPayment paymentWithProduct:_product]; 
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self]; 
    [[SKPaymentQueue defaultQueue] addPayment:payment]; 
} 


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

    for (SKPaymentTransaction *transaction in transactions) { 
     switch (transaction.transactionState) { 
      case SKPaymentTransactionStatePurchased: { [self UnlockPurchase]; 
       [[SKPaymentQueue defaultQueue] finishTransaction:transaction]; 
       break; } 
      case SKPaymentTransactionStateFailed: { NSLog(@"Transaction Failed"); 
       [[SKPaymentQueue defaultQueue] finishTransaction:transaction]; 
       break; } 
      default: 
       break; 
     } 
    } 
} 

- (void)UnlockPurchase { 
    NSLog(@"Purchase Successful!"); 
} 



// Item Buttons 
- (IBAction)buttonA:(id)sender { 
    _productID = @"com.example.IAP.itemA"; 
} 

- (IBAction)buttonB:(id)sender { 
    _productID = @"com.example.IAP.itemB"; 
} 

不知道该怎么办......我已经打过电话了CanPurchase方法在viewDidLoad方法中，我甚至尝试了用于productID的方法内部的switch语句，但没有任何工作。

如果有人可以提出解决方案或尝试帮助，我会非常感激。我一直在努力解决这个问题。谢谢！

FYI：这里是一个记录所发生的事情（我在这里手动添加注释的每一行，让你知道什么是用户做来获取日志到位全日）

app loads  12:14:49.488 IAP[4928:370136] Products available: (null) 
click B then buy 12:14:52.053 IAP[4928:370136] Products available: IAP A 
cancel iap  12:15:01.086 IAP[4928:370136] Transaction Failed 
click B then buy 12:15:02.622 IAP[4928:370136] Products available: IAP B 
cancel iap  12:15:04.256 IAP[4928:370136] Transaction Failed 
click A then buy 12:15:02.622 IAP[4928:370136] Products available: IAP B 
cancel iap  12:15:04.256 IAP[4928:370136] Transaction Failed 
click A then buy 12:15:02.622 IAP[4928:370136] Products available: IAP A 
cancel iap  12:15:04.256 IAP[4928:370136] Transaction Failed 

的

该循环继续进行，始终使productRequest与选定的IAP滞后1。请帮忙！

Answer 1

看起来你只是混淆自己这里：

NSArray *products = response.products; 
if (products.count != 0) { 
    NSLog(@"Products available: %@", _product.localizedTitle); 
    _product = products[0]; 

您都可以从先前存储在产品本地化的称号。这就是你为何落后的原因。取而代之的是，从产品中获得产品，从而得到其产品的标题：

NSArray *products = response.products; 
if (products.count != 0) { 
    SKProduct* product = products[0]; 
    NSLog(@"Products available: %@", product.localizedTitle);