NSInvalidArgumentException：無法識別的選擇發送到實例

Question

當我運行我的應用程序我得到這個錯誤：

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '- 
    [UIRoundedRectButton copyWithZone:]: unrecognized selector sent to instance 
    0xcc86970' 

爲什麼我得到這樣的錯誤？我小心地檢查IBOutlets和IBAction的所有連接。這是我的代碼：

MenuViewController.h

 @interface MenuViewController : UIViewController 
<UITableViewDelegate, UITableViewDataSource>{ 

} 


@property (nonatomic, copy) IBOutlet UITableView * tableView; 
@property (nonatomic,copy) IBOutlet UILabel *labelTitle; 
@property (nonatomic, copy) IBOutlet UIButton *buttonHome; 
@property (nonatomic, copy) IBOutlet UIButton *buttonMap; 
@property (nonatomic, copy) IBOutlet UIButton *buttonFavorites; 

-(IBAction) pressedHome:(id)sender; 
-(IBAction) pressedMap: (id)sender; 
-(IBAction) pressedFavorites: (id)sender; 

@end 

在MenuViewController.m提前

-(IBAction) pressedHome:(id)sender{ 

    MenuViewController * menu =[[MenuViewController alloc]initWithNibName:@"MenuViewController" bundle:nil]; 
    [self.navigationController pushViewController:menu animated:YES]; 


    } 

    -(IBAction) pressedMap: (id)sender{ 

     MapViewController * map =[[MapViewController alloc]initWithNibName:@"MapViewController" bundle:nil]; 
     [self.navigationController pushViewController:map animated:YES]; 
    } 


    -(IBAction) pressedFavorites: (id)sender{ 

     FavoritesViewController * favorites =[[FavoritesViewController alloc]initWithNibName:@"FavoritesViewController" bundle:nil]; 
     [self.navigationController pushViewController:favorites animated:YES]; 
    } 

感謝

Answer 1

刪除copy。這是因爲UIButton（和其他UIControls）不符合NSCopying協議，因此複製它們的呼叫失敗。

Answer 2

刪除copy以下屬性

@property (nonatomic) IBOutlet UITableView * tableView; 
@property (nonatomic) IBOutlet UILabel *labelTitle; 
@property (nonatomic) IBOutlet UIButton *buttonHome; 
@property (nonatomic) IBOutlet UIButton *buttonMap; 
@property (nonatomic) IBOutlet UIButton *buttonFavorites;