在執行中看不到void程序

Question

我在我的視圖控制器的接口中聲明瞭一個SetBallVisibility方法。

但是，當我嘗試在實現中使用它時，出現未聲明的標識符錯誤。我做錯了什麼？

接口

@interface TimeFrameController : UIViewController { 

    IBOutlet UILabel *lblTime; 
    IBOutlet UIButton *btnTimeoutOrRunning; 
    IBOutlet UILabel *lblMessage; 
    IBOutlet UIButton *btnNextVisit; 

    IBOutlet UIImage *picRed; 
    IBOutlet UIImage *picYellow; 

    IBOutlet UIButton *btnRed; 
    IBOutlet UIButton *btnYellow; 

    IBOutlet UIButton *btnChangePlayer; 

    IBOutlet UIButton *btnFrameOver; 

    NSString *Player1Name; 
    NSString *ActivePlayer; 
    NSString *Player2Name; 

    NSString *Player1Col; 
    NSString *Player2Col; 

    NSString *ActivePlayerCol; 

    NSTimer *StopClock; 

    int *StopClockOffset; 
    int *StopClockPos; 

    int *Player1Visits; 
    int *Player2Visits; 
} 

@property (nonatomic, retain) IBOutlet UILabel *lblTime; 
@property (nonatomic, retain) IBOutlet UILabel *lblMessage; 
@property (nonatomic, retain) IBOutlet UIButton *btnTimeoutOrRunning; 
@property (nonatomic, retain) IBOutlet UIImage *picRed; 
@property (nonatomic, retain) IBOutlet UIImage *picYellow; 
@property (nonatomic, retain) IBOutlet UIButton *btnYellow; 
@property (nonatomic, retain) IBOutlet UIButton *btnRed; 
@property (nonatomic, retain) IBOutlet UIButton *btnChangePlayer; 
@property (nonatomic, copy) NSString *Player1Name; 
@property (nonatomic, copy) NSString *Player2Name; 
@property (nonatomic, copy) NSString *Player1Col; 
@property (nonatomic, copy) NSString *Player2Col; 
@property (nonatomic, copy) NSString *ActivePlayer; 
@property (nonatomic, retain) IBOutlet UIButton *btnNextVisit; 
@property (nonatomic, retain) IBOutlet UIButton *btnFrameOver; 

//@property (nonatomic, retain) NSTimer *StopClock; 

bool *ColoursPicked; 

//NSString *ActivePlayer; 
NSString *ActivePlayerCol; 

- (void)SetBallVisibility; 
- (IBAction)NextVisitPressed:(id)sender; 
- (IBAction)TimeOutOrRunningPressed:(id)sender; 
-(void)StartStopClock:(int)nOffSet; 
- (IBAction)ChangePlayer:(id)sender; 
- (IBAction)YellowPressed:(id)sender; 
- (IBAction)RedPressed:(id)sender; 
@end 

Implementation 

#import "TimeFrameController.h" 

@implementation TimeFrameController 
@synthesize lblTime; 
//@synthesize StopClock; 
@synthesize btnTimeoutOrRunning; 
@synthesize picRed; 
@synthesize picYellow; 
@synthesize lblMessage; 
@synthesize Player1Name; 
@synthesize ActivePlayer; 
@synthesize Player2Name; 
@synthesize btnRed; 
@synthesize btnYellow; 
@synthesize Player1Col; 
@synthesize Player2Col; 
@synthesize btnNextVisit; 
@synthesize btnChangePlayer; 
@synthesize btnFrameOver; 


- (void)updateCounter:(NSTimer *)theTimer { 

} 

-(void) StartStopClock:(int)nOffSet{  
..... 
} 

- (IBAction)NextVisitPressed:(id)sender{ 
....  
    [SetBallVisibility]; 
..... 
} 


- (void)SetBallVisibility{ 
    if ((Player1Visits > 1) && (Player2Visits > 1)) 
    { 
    } 
} 

乾杯

保羅

Answer 1

必須使用

[self SetBallVisibility]; 

消息（=一個方法調用）在Objective-C總是發送到一個對象，這也適用於來自同一類的方法。