Question

这是gamekithelper.m中的代码

- (void)authenticateLocalPlayer
{

     //1
     GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];

     //add a weak local player
     __weak GKLocalPlayer *blockLocalPlayer = localPlayer;

     if (localPlayer.isAuthenticated) {
         [[NSNotificationCenter defaultCenter] postNotificationName:LocalPlayerIsAuthenticated object:nil];
         return;
     }

     //2
     localPlayer.authenticateHandler  =
     ^(UIViewController *viewController, NSError *error) {
         //3
         [self setLastError:error];

         if(viewController != nil) {
             //4
             [self setAuthenticationViewController:viewController];


             *******problem code************
             // add event handler
             [blockLocalPlayer registerListener:self];

         } else if([GKLocalPlayer localPlayer].isAuthenticated) {
             //5
             _enableGameCenter = YES;
             [[NSNotificationCenter defaultCenter] postNotificationName:LocalPlayerIsAuthenticated object:nil];

              *******problem code************
             // add event handler
             [blockLocalPlayer registerListener:self];

         } else {
             //6
             _enableGameCenter = NO;
         }
     };

}

这是gamekithelper.h中的@interface

@interface GameKitHelper : NSObject <GKTurnBasedMatchmakerViewControllerDelegate, GKTurnBasedEventListener>

这是警告

Sending 'GameKitHelper *const __strong' to parameter of incompatible type 'id<GKLocalPlayerListener>'

我觉得我犯了一个容易修复的错误，但我无法弄清楚它是什么，你们中的任何人都可以帮助我吗？

额外信息

我在spritekit

Answer 1

[blockLocalPlayer registerListener:self];

此方法接受符合协议GKLocalPlayerListener的对象。正如您在界面中看到的那样，GameKitHelper并未声明它符合GKLocalPlayerListener协议。

您应该通过更改此项来添加GKLocalPlayerListener的一致性声明：

@interface GameKitHelper : NSObject <GKTurnBasedMatchmakerViewControllerDelegate, GKTurnBasedEventListener>

到此：

@interface GameKitHelper : NSObject <GKLocalPlayerListener, GKTurnBasedMatchmakerViewControllerDelegate, GKTurnBasedEventListener>

添加事件监听器以转向基于ios游戏时的警告

1 个答案: