Question

这似乎很奇怪，因为我无法解决它并坚持下去。我正在使用故事板在tableview和detailview之间导航。当我将一个（NewsRecord）对象从我的tableview类（TopStoriesViewController）传递给我的详细类（DetailNewsViewController）时，它工作正常。但是现在我需要在移动到detail类而不是单个（NewsRecord）对象时传递一个（NewsRecord）对象数组。但是当我在我的detail类中创建一个NSArray *并尝试使用detail类的对象在prepareForSegue方法的tableview类中访问它时，它会给出以下错误---在'DetailNewsViewController类型的对象上找不到属性'items' '在编译时。 items是一个NSArray对象，它从'entries'获取其内容，这些也是TopStoriesViewController类中的NSArray。

我的问题是为什么我能够在TopStoriesViewController中访问DetailNewsViewController的getNewsDetails而不是项目。

我的课程如下 - TopStoriesViewController.m

#import "DetailNewsViewController.h"

     some code here....

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
    {
         if ([[segue identifier] isEqualToString:@"ShowDetailedNews"]) {
         DetailNewsViewController *detailNewsVC = [segue destinationViewController];
         [segue.destinationViewController setHidesBottomBarWhenPushed:YES];
         NSInteger indexForNewsSelectedFromTBV = [[self.tableView indexPathForSelectedRow] row];
         [detailNewsVC setGetNewsDetails:[entries objectAtIndex:indexForNewsSelectedFromTBV]]; //This is working fine...
         detailNewsVC.items=entries;  //Error is occurring here...
    }
   }

DetailNewsViewController.h

#import "NewsRecord.h"
    @interface DetailNewsViewController : UIViewController {
       NewsRecord *getNewsDetails;

       some other declarations...

       NSArray *items;
   }
@property(nonatomic,retain) NewsRecord *getNewsDetails;
@property(nonatomic,retain) NSArray *items;
@end

DetailNewsViewController.m

#import "DetailNewsViewController.h"
@synthesize getNewsDetails,items;

NewsRecord.h

@interface NewsRecord : NSObject {
      NSString *newsTitle;
      NSString *newsDescription;
    }
    @property(nonatomic,retain) NSString *newsTitle;
    @property(nonatomic,retain) NSString *newsDescription;
    @end

Answer 1

您应该尝试明确使用项目的setter：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
     if ([[segue identifier] isEqualToString:@"ShowDetailedNews"]) 
     {

     DetailNewsViewController *detailNewsVC = [segue destinationViewController];
    ...
     [detailNewsVC setItems:entries];

     }
}

在类型的对象上找不到属性

1 个答案: