使用故事板的當前視圖控制器

Question

我已經按照教程將In App Purchase添加到我的應用中。有2次：

1. 按鈕「購買物品」
2. 窗口彈出，允許用戶選擇產品

我添加的代碼完全沒問題，但在本教程中，他們使用XIB文件，但我正在使用Storyboard。我對「購買物品」按鈕的代碼看起來是這樣的：

- (IBAction)PurchaseItem:(id)sender { 

    _purchaseController = [[PurchasedViewController alloc] initWithNibName:Nil bundle:nil]; 

    _purchaseController.productID = @"com.myapp"; 

    [self presentViewController:_purchaseController animated:YES completion:NULL]; 

    [_purchaseController getProductID:self]; 

} 

我的問題是，當點擊該按鈕時，會出現黑屏，但我想PurchasedViewController顯示

我是否需要改變一些東西？

編輯：

使用作爲附加編輯的代碼，但得到的錯誤：

- (IBAction)PurchaseItem:(id)sender { 

     PurchasedViewController *purchaseContr = (PurchasedViewController *)[self.storyboard instantiateViewControllerWithIdentifier:@"menu"]; 
     //menu is only an example 
     purchaseContr.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; 
     [self presentViewController:purchaseContr animated:YES completion:nil]; 

    } 

Answer 1

有了記事板，你應該給一個標識符喜歡的圖片：在您的viewController 水龍頭in'身份檢查員'

在這個例子中自定義類應該是：PurchasedViewController

，這是代碼：

- (IBAction)PurchaseItem:(id)sender { 
    PurchasedViewController *purchaseContr = (PurchasedViewController *)[self.storyboard instantiateViewControllerWithIdentifier:@"menu"]; 
    //menu is only an example 
    purchaseContr.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; 
    [self presentViewController:purchaseContr animated:YES completion:nil]; 
} 

Answer 2

試試這個

_purchaseController = [[PurchasedViewController alloc] init]; 

_purchaseController.productID = @"com.myapp";   
/* 1. Add the new VC as a child VC */ 
[self addChildViewController:_purchaseController]; 

/* 2. Add new view to source view */ 
[self.view addSubview:_purchaseController.view]; 

/* 3. Inform 'didMoveToParentViewController' to newly added view controller */ 
[_purchaseController didMoveToParentViewController:self]; 

[_purchaseController getProductID:self];