视图控制器错误

Question

“未知类型名‘的ViewController’你的意思‘的UIViewController’”

那是错误，我得到这个

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

@interface PurchaseViewController : UIViewController <SKPaymentTransactionObserver, SKProductsRequestDelegate> 
@property (weak, nonatomic) IBOutlet UILabel *productTitle; 
@property (weak, nonatomic) IBOutlet UIButton *buyButton; 
@property (weak, nonatomic) IBOutlet UITextView *productDescription; 
- (IBAction)buyProduct:(id)sender; 
@property (strong, nonatomic) SKProduct *product; 
@property (strong, nonatomic) NSString *productID; 
@property (strong, nonatomic) ViewController *homeViewController; //error here 
- (void)getProductInfo:(UIViewController *)viewController; 
@end 

Answer 1

的@interface声明之前，把这样一行：

@class ViewController; 

看看是否有帮助。

Answer 2

您需要导入可可库！

#import <Cocoa/Cocoa.h> 

这应该做的伎俩。