意外的界面名称＆＃39;名称＆＃39;：预期的表达式消息

Question

我在我的咖啡订单应用程序的某个阶段，我从DetailViewController弹出UIAlertView，询问是/否继续。 ＆＃39;是＆＃39;转到下一个View Controller，这很好，但是没有＆＃39;也转到相同的视图控制器，但我只是想让它返回到DetailViewController，为用户提供更改其顺序的选项。我可以在代码中看到使用if语句，但是下面的代码提供了＆＃34; Unexpected接口名称＆＃39; DetailViewController＆＃39;：期望表达式消息＆＃34; 我是新手，一个学生在学习，虽然有教程，但在我的第二个代码中有一段代码，如果＆＃39;根据本网站上的一些解决方案，buttonIndex == 1的语句应该是正确的，但出于某种原因，我在这里遗漏了一些东西。我使用XCode v7.0.1，也很难找到这个版本的最新解决方案。 （注意我知道UIAlertView已弃用的代码，但它正在运行）

这是代码，感谢一些帮助：

#import "DetailViewController.h"

@interface DetailViewController ()

@end

@implementation DetailViewController
@synthesize YourOrder;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

self.DetailTitle.text = _DetailModule[0];
self.DetailDescription.text = _DetailModule[1];
self.DetailImageView.image = [UIImage imageNamed:_DetailModule[2]];

self.navigationItem.title = _DetailModule[0];
self.YourOrder.text = @"";
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/

- (IBAction)addItem:(id)sender {
self.YourOrder.text = [NSString stringWithFormat:@"%@ \n %@",
                       self.YourOrder.text, [sender currentTitle]];
}

- (IBAction)alertView:(id)sender {

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Send Order" message:@"Are you happy with your order?" delegate:self cancelButtonTitle:@"Yes" otherButtonTitles:@"No",nil];
[alert show];
}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
    // the user clicked Yes
    if (buttonIndex == 0)
    {
        // do something here...
    }

    // the user clicked No - need to write code to return a 'no' click to the DetailViewController to try again.
    if (buttonIndex == 1)

    {
        [self presentViewController:DetailViewController animated:YES completion:nil];
    }
}

@end

我也尝试过：

if (buttonIndex == 1)

    {
            DetailViewController *detailView = [[DetailViewController alloc] init];
            [self presentViewController:detailView animated:YES completion:nil];
    }

但它仍然会转到相同的View控制器，我看到＆＃34;警告：尝试显示其视图不在窗口层次结构中！＆＃34;错误信息。