iOS：在應用程序購買與購買進度指示器UIActivityIndi​​catorView

Question

我嘗試了幾個解決方案，但從未成功。我想要的是當用戶點擊Buy Button時，UIAlertView與UIActivityIndicatorView出現等待應用程序訪問應用程序商店。但是一旦購買完成，我不知道該去哪裏消除這個UIAlertView。我知道，駁回UIAlertView，我們使用：[alert dismissWithClickedButtonIndex:-1 animated:YES];

所以，請你幫我回答兩個問題：

1）是我的代碼如下OK或任何其他更好的實現呢？

2）我應該在哪裏解僱UIAlertView的所有情況：

• 用戶接受購買
• 用戶取消購買
• 購買不成功

以下是我的代碼：

-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{ 
    UIAlertView *alert; 
    for(SKPaymentTransaction *transaction in transactions){ 
     switch (transaction.transactionState) { 
      case SKPaymentTransactionStatePurchasing:     
       alert = [[UIAlertView alloc]initWithTitle: @"In App Purchase" message: @"Processing your purchase..." delegate: nil cancelButtonTitle: nil otherButtonTitles: nil]; 
       UIActivityIndicatorView *ind = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle: UIActivityIndicatorViewStyleWhiteLarge]; 
       [ind startAnimating];  
       [alert addSubview: ind]; 
       [alert show]; 
       [ind release]; 
       [alert release]; 
       break; 
      case SKPaymentTransactionStatePurchased: 
       [[SKPaymentQueue defaultQueue]finishTransaction:transaction]; 
       UIAlertView *tmp = [[UIAlertView alloc] 
            initWithTitle:@"Complete" 
            message:@"You have bought the full version!" 
            delegate:self 
            cancelButtonTitle:nil 
            otherButtonTitles:@"Ok", nil]; 
       [tmp show]; 
       [tmp release]; 
       break; 
      case SKPaymentTransactionStateRestored: 
       [[SKPaymentQueue defaultQueue]finishTransaction:transaction]; 
       break; 
      case SKPaymentTransactionStateFailed: 
       if (transaction.error.code !=SKErrorPaymentCancelled) { 
        [[SKPaymentQueue defaultQueue]finishTransaction:transaction]; 
        UIAlertView *tmp = [[UIAlertView alloc] 
             initWithTitle:@"Error" 
             message:@"Purchase not successful!" 
             delegate:self 
             cancelButtonTitle:nil 
             otherButtonTitles:@"Ok", nil]; 
        [tmp show]; 
        [tmp release];    
       } 
       [[SKPaymentQueue defaultQueue]finishTransaction:transaction]; 
       break; 
     } 
    } 
} 

Answer 1

嘗試添加

case SKPaymentTransactionStatePurchased: 
[alert dismissWithClickedButtonIndex:-1 animated:YES]; 

和

case SKPaymentTransactionStateFailed: 
[alert dismissWithClickedButtonIndex:-1 animated:YES];