使用Storyboard呈现视图控制器

Question

我已经按照教程将In App Purchase添加到我的应用程序中.有2次观看次数:

1. 按钮'购买商品'
2. 屏幕出现,允许用户选择产品

我已经完全添加了代码,但在教程中他们使用的是XIB文件,但我使用的是Storyboard.我的"购买项目"按钮的代码如下所示:

- (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];

}

我遇到的问题是,当单击按钮时,会出现黑屏,但我希望BuysedViewController显示

我需要改变什么吗？

编辑:

使用已编辑的代码但收到附加错误:

- (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

使用故事板,您应该在图片中给出一个标识符:点击您的viewController和"身份检查器"

在此示例中,Custom Class应为: PurchasedViewController

这是代码:

 - (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];
 }