Objective-C無法在Game Center中調用函數

Question

我有點噩夢試圖通過Game Center實現讓兩個玩家在我的iPhone應用程序上相互對戰的能力。

我只是試圖從我有一個不同的.m文件訪問GameCenterManager.m中的函數。在我racetohundredViewController.h文件我有：

#import <UIKit/UIKit.h> 
#import "startPage.h" 
#import "GameCenterManager.h" 
#import <GameKit/GameKit.h> 

@interface racetohundredViewController : UIViewController <UIActionSheetDelegate,  GKLeaderboardViewControllerDelegate, GameCenterManagerDelegate> 

{ 
    GameCenterManager *gcManager; 
    BOOL gameIsMultiplayer; 
    double randomHostNumber; 
} 
@property (retain, nonatomic) GameCenterManager *gcManager; 

我在相應.m文件我有：

@interface racetohundredViewController() 
@end 

@implementation racetohundredViewController 
@synthesize gcManager; 

- (void)generateAndSendHostNumber; 
{ 
    NSLog(@"Generate and send host number"); 
    randomHostNumber = arc4random(); 
    NSString *randomNumberString = [NSString stringWithFormat: @"$Host:%f", randomHostNumber]; 
    NSLog(@"the random number string is: %@", randomNumberString); 
    [self.gcManager testString]; 
    [self.gcManager sendStringToAllPeers:randomNumberString reliable: YES]; 
} 

- (void)viewDidLoad 
{ 
[self generateAndSendHostNumber]; 
} 

這是[self.gcManager的TestString]和[self.gcManager sendStringToAllPeers：randomNumberString reliable：YES];沒有被調用。他們之前，我已經明確地搞砸了。我可以看到NSLog的隨機數字串。

在我GameCenterManager.h文件我已經（包括一些位無關這個問題）：

#import <Foundation/Foundation.h> 
#import <GameKit/GameKit.h> 

@class GKLeaderboard, GKAchievement, GKPlayer; 
@protocol GameCenterManagerDelegate <NSObject> 
@optional 
- (void) processGameCenterAuthentication: (NSError*) error; 
- (void) scoreReported: (NSError*) error; 
- (void) reloadScoresComplete: (GKLeaderboard*) leaderBoard error: (NSError*) error; 
- (void) achievementSubmitted: (GKAchievement*) ach error:(NSError*) error; 
- (void) achievementResetResult: (NSError*) error; 
- (void) mappedPlayerIDToPlayer: (GKPlayer*) player error: (NSError*) error; 
- (void) receivedData:(NSDictionary *)dataDictionary; 
@end 

@interface GameCenterManager : NSObject <GameCenterManagerDelegate> 
{ 
    id <GameCenterManagerDelegate, NSObject> delegate; 
    NSMutableDictionary* earnedAchievementCache; 
    id matchOrSession; 
} 

//This property must be atomic to ensure that the cache is always in a viable state... 
@property (retain) NSMutableDictionary* earnedAchievementCache; 
@property (nonatomic, strong) id <GameCenterManagerDelegate, NSObject> delegate; 
@property(nonatomic, strong) id matchOrSession; 

+ (BOOL) isGameCenterAvailable; 
- (void) authenticateLocalUser; 
- (void)sendStringToAllPeers:(NSString *)dataString reliable:(BOOL)reliable; 
- (void)sendString:(NSString *)dataString toPeers:(id)peers reliable: (BOOL)reliable; 
-(void)testString; 

最後.m文件的削減版本GameCenterManager：

#import "GameCenterManager.h" 
#import <GameKit/GameKit.h> 
@implementation GameCenterManager 
@synthesize earnedAchievementCache; 
@synthesize delegate; 
@synthesize matchOrSession; 


-(void)testString 
{ 
    NSLog(@"THIS IS A TEST"); 
} 

我也可以發佈有關sendString的代碼，但原理是即使使用基本的testString函數也不會調用它。

我在這裏錯過了一些非常明顯的東西嗎？看起來，當我單步執行代碼時，它會突出顯示GameCenterManager的.h文件中的函數，但它不會按照我的請求顯示NSLog。

Answer 1

我最好的猜測是self.gcManager是nil。你在哪裏實例化你的GameCenterManager？