類的安裝程序不被稱爲

我試圖實現一個car2go風格的應用程序，你點擊一個註釋視圖，然後可以預訂汽車。問題是，當我嘗試繼續我想要傳遞車對象時，我檢查對象是否執行選擇器設置車輛，但if語句失敗，儘管我很確定它已實現。有人能告訴我爲什麼嗎？這是一個學校項目。類的安裝程序不被稱爲

#import "MapViewController.h" 
#import <MapKit/MapKit.h> 
#import <CoreLocation/CoreLocation.h> 
#import "Vehicles+Company.h" 
#import "Vehicles+MKAnnotation.h" 

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{ 

if ([segue.identifier isEqualToString:@"reserveCar"]) { 
    if ([sender isKindOfClass:[MKAnnotationView class]]) { 
     MKAnnotationView *aView = sender; 
     if ([aView.annotation isKindOfClass:[Vehicles class]]) { 
      Vehicles *vehicle = aView.annotation; 
      if ([segue.destinationViewController respondsToSelector:@selector(setVehicle:)]) { 
       [segue.destinationViewController performSelector:@selector(setVehicle:) withObject:vehicle]; 
      } 
     } 
    } 
} 

}

這是它延續到的視圖控制器。

.h文件中

#import <UIKit/UIKit.h> 
#import "Vehicles+MKAnnotation.h" 
#import "Vehicles.h" 
#import "Vehicles+Company.h" 


@interface CompanyVehicleViewController : UIViewController 

@property (nonatomic,strong) Vehicles *vehicle; 

@end

.m文件

#import "CompanyVehicleViewController.h" 

@interface CompanyVehicleViewController() 

@end 

@implementation CompanyVehicleViewController 

-(void) setVehicle:(Vehicles *)vehicle{ 
_vehicle = vehicle; 
self.title = vehicle.name; 
NSLog(@"Vehicle is %@", vehicle); 
} 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
if (self) { 
    // Custom initialization 
} 
return self; 
} 

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

@end

來源

2014-03-26 user2076774

確認'segue.destinationViewController'確實是'CompanyVehicleViewController'的一個實例。 – rmaddy

我該怎麼做？ – user2076774

使用調試器或添加一個'NSLog'語句。 – rmaddy

最有可能segue.destinationViewController不是CompanyVehicleViewController一個實例。

驗證故事板中視圖控制器的類型設置爲正確的類。

來源

2014-03-26 05:49:10 rmaddy

類的安裝程序不被稱爲

回答

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