Objective c 如何将对象从类传递到对象从一个类到另一个类的视图？

我想通过一个像这里一样的第一视图

        if (self.bookDetailViewController == nil)
            {
        iPhoneStreamingPlayerViewController *aBookDetail = [[iPhoneStreamingPlayerViewController alloc] initWithNibName:@"iPhoneStreamingPlayerView" bundle:nil];
        self.bookDetailViewController = aBookDetail;
        NSLog(@"View initilaized");
        [aBookDetail release];


    }


    //call a method from another class like over here 
     [booksNavController1 nowPlayingView:bookDetailViewController];


     //in 2nd view controller 

    -(void)nowPlayingView:(iPhoneStreamingPlayerViewController *)NPView
   {

    nowPlayingSong = NPView;


    }


    -(void)getSng:(NSString *)sng
     {
     name = sng;

     }


    //ibacton for toolbar button 


    -(IBAction)nowPlaying
    { 


    Music_appAppDelegate *delegate = [[UIApplication sharedApplication]delegate];
        [delegate.booksNavController pushViewController:nowPlayingSong animated:YES];
    }

下面是nsloged应用程序试图将nil视图控制器推送到目标上的内容。

---

因SpringBoard终止而终止。

不要发布详细信息。i、 e.注释掉这一行：

    [aBookDetail release];

---

试试看它是否管用。

你必须用不同的结构来组织你的程序。得到null的原因是，类在打印输出之前执行

Parser *parserClass = [Parser new];
parserClass.array = [[NSArray alloc]initWithObjects:@"One",@"Two", nil];
NSLog(@"%@", parserClass.array);

很抱歉，你必须以不同的方式组织课堂

或者您可以使用AppDelegate*[[UIApplication sharedApplication]委托]；允许类和AppDelegate之间共享，然后相应地创建子类