objective-c - 如何跨设备共享保存的游戏？

问题描述

我在我的 iOS 游戏中实现了 GameKit，包括保存的游戏功能。

这是我如何保存和加载游戏的示例：

MobSvcSavedGameData.h

#ifndef MOBSVC_SAVEDGAMEDATA_H
#define MOBSVC_SAVEDGAMEDATA_H

#import <Foundation/Foundation.h>

@interface MobSvcSavedGameData : NSObject <NSCoding>

@property (readwrite, retain) NSString *data;

+(instancetype)sharedGameData;
-(void)reset;

@end


#endif /* MOBSVC_SAVEDGAMEDATA_H */

MobSvcSavedGameData.m

#import "MobSvcSavedGameData.h"
#import <Foundation/Foundation.h>

@interface MobSvcSavedGameData () <NSObject, NSCoding>

@end

@implementation MobSvcSavedGameData

#pragma mark MobSvcSavedGameData implementation

static NSString * const sgDataKey = @"data";

+ (instancetype)sharedGameData {
    static id sharedInstance = nil;

    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance = [[self alloc] init];
    });

    return sharedInstance;
}

- (void)reset
{
    self.data = nil;
}

- (void)encodeWithCoder:(NSCoder *)encoder
{
    [encoder encodeObject:self.data forKey: sgDataKey];
}

- (nullable instancetype)initWithCoder:(nonnull NSCoder *)decoder {
    self = [self init];
    if (self) {
        self.data = [decoder decodeObjectForKey:sgDataKey];
    }
    return self;
}

@end

为简单起见，我上面保存的游戏对象只有一个NSString，它将像这样被序列化和上传：

void MobSvc::uploadSavedGameDataAwait(const char *name, const char *data)
{
    GKLocalPlayer *mobSvcAccount = [GKLocalPlayer localPlayer];

    if(mobSvcAccount.isAuthenticated)
    {
        MobSvcSavedGameData *savedGameData = [[MobSvcSavedGameData alloc] init];
        savedGameData.data = [NSString stringWithUTF8String:data];
        [mobSvcAccount saveGameData:[NSKeyedArchiver archivedDataWithRootObject:savedGameData] withName:[[NSString alloc] initWithUTF8String:name] completionHandler:^(GKSavedGame * _Nullable savedGame __unused, NSError * _Nullable error) {
            if(error == nil)
            {
                NSLog(@"Successfully uploaded saved game data");
            }
            else
            {
                NSLog(@"Failed to upload saved game data: %@", error.description);
            }
        }];
    }
}

这就是我在下一个游戏会话中再次下载最近保存的游戏的方式：

void MobSvc::downloadSavedGameDataAwait(const char *name)
{
    GKLocalPlayer *mobSvcAccount = [GKLocalPlayer localPlayer];

    if(mobSvcAccount.isAuthenticated)
    {
        [mobSvcAccount fetchSavedGamesWithCompletionHandler:^(NSArray<GKSavedGame *> * _Nullable savedGames, NSError * _Nullable error) {
            if(error == nil)
            {
                GKSavedGame *savedGameToLoad = nil;
                for(GKSavedGame *savedGame in savedGames) {
                    const char *sname = savedGame.name.UTF8String;
                    if(std::strcmp(sname, name) == 0)
                    {
                        if (savedGameToLoad == nil || savedGameToLoad.modificationDate < savedGame.modificationDate) {
                            savedGameToLoad = savedGame;
                        }
                    }
                }
                if(savedGameToLoad != nil) {
                    [savedGameToLoad loadDataWithCompletionHandler:^(NSData * _Nullable data, NSError * _Nullable error) {
                        if(error == nil)
                        {
                            MobSvcSavedGameData *savedGameData = [NSKeyedUnarchiver unarchiveObjectWithData:data];
                            NSLog(@"Successfully downloaded saved game data: %@", [savedGameData.data cStringUsingEncoding:NSUTF8StringEncoding]);
                        }
                        else
                        {
                            NSLog(@"Failed to download saved game data: %@", error.description);
                        }
                    }];
                }
            }
            else
            {
                NSLog(@"Failed to prepare saved game data: %@", error.description);
            }
        }];
    }
}

我通过上传一个随机字符串并在下一次会话中使用相同的name. 有用！但是，一旦我尝试从我的第二部 iPhone 下载保存的游戏，它就无法正常工作。在两部手机上，我都登录了同一个 Game-Center 帐户，我可以通过比较实例playerId中的来确认这一点。GKLocalPlayer

我已经设置了正确的 iCloud 容器并将我的游戏链接到它，但是 iCloud 容器后端中的日志仍然是空的。

到底是怎么回事？如何在 Apple 设备之间共享保存的游戏？

标签： objective-cicloudgame-centerobjective-c++gamekit

objective-c - 如何跨设备共享保存的游戏？

问题描述

解决方案

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