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iphone - 如果我有一个成就的标识符和percentComplete,是否可以将其转换为(GKAchievement *)成就?

转载 作者:行者123 更新时间:2023-12-01 19:27:17 26 4
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我正在使用http://developer.apple.com/library/ios/#samplecode/GKTapper/Listings/Classes_GameCenterManager_m.html ...具体来说,这段代码:

- (void) submitAchievement: (NSString*) identifier percentComplete: (double) percentComplete
{
//GameCenter check for duplicate achievements when the achievement is submitted, but if you only want to report
// new achievements to the user, then you need to check if it's been earned
// before you submit. Otherwise you'll end up with a race condition between loadAchievementsWithCompletionHandler
// and reportAchievementWithCompletionHandler. To avoid this, we fetch the current achievement list once,
// then cache it and keep it updated with any new achievements.
if(self.earnedAchievementCache == NULL)
{
[GKAchievement loadAchievementsWithCompletionHandler: ^(NSArray *scores, NSError *error)
{
if(error == NULL)
{
NSMutableDictionary* tempCache= [NSMutableDictionary dictionaryWithCapacity: [scores count]];
for (GKAchievement* score in scores)
{
[tempCache setObject: score forKey: score.identifier];
}
self.earnedAchievementCache= tempCache;
[self submitAchievement: identifier percentComplete: percentComplete];
}
else
{
//Something broke loading the achievement list. Error out, and we'll try again the next time achievements submit.
[self callDelegateOnMainThread: @selector(achievementSubmitted:error:) withArg: NULL error: error];
}

}];
}
else
{
//Search the list for the ID we're using...
GKAchievement* achievement= [self.earnedAchievementCache objectForKey: identifier];
if(achievement != NULL)
{
if((achievement.percentComplete >= 100.0) || (achievement.percentComplete >= percentComplete))
{
//Achievement has already been earned so we're done.
achievement= NULL;
}
achievement.percentComplete= percentComplete;
}
else
{
achievement= [[[GKAchievement alloc] initWithIdentifier: identifier] autorelease];
achievement.percentComplete= percentComplete;
//Add achievement to achievement cache...
[self.earnedAchievementCache setObject: achievement forKey: achievement.identifier];
}
if(achievement!= NULL)
{
//Submit the Achievement...
[achievement reportAchievementWithCompletionHandler: ^(NSError *error)
{
[self callDelegateOnMainThread: @selector(achievementSubmitted:error:) withArg: achievement error: error];
}];
}
}
}

在“// Something break ..”注释点,我想将我具有的标识符&percentComplete转换为GKAchievement实例,然后可以将其发送到以下代码中(来自 http://www.garagegames.com/community/forums/viewthread/122529/):
- (void)saveAchievementToDevice:(GKAchievement *)achievement
{

NSString *savePath = getGameCenterSavePath();

// If achievements already exist, append the new achievement.
NSMutableArray *achievements = [[[NSMutableArray alloc] init] autorelease];
NSMutableDictionary *dict;
if([[NSFileManager defaultManager] fileExistsAtPath:savePath]){
dict = [[[NSMutableDictionary alloc] initWithContentsOfFile:savePath] autorelease];

NSData *data = [dict objectForKey:achievementsArchiveKey];
if(data) {
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
achievements = [unarchiver decodeObjectForKey:achievementsArchiveKey];
[unarchiver finishDecoding];
[unarchiver release];
[dict removeObjectForKey:achievementsArchiveKey]; // remove it so we can add it back again later
}
}else{
dict = [[[NSMutableDictionary alloc] init] autorelease];
}


[achievements addObject:achievement];

// The achievement has been added, now save the file again
NSMutableData *data = [NSMutableData data];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:achievements forKey:achievementsArchiveKey];
[archiver finishEncoding];
[dict setObject:data forKey:achievementsArchiveKey];
[dict writeToFile:savePath atomically:YES];
[archiver release];
}

这可能吗?如果是这样,怎么做?

最佳答案

这些最下面的代码行看起来像您要的内容:

achievement= [[[GKAchievement alloc] initWithIdentifier: identifier] autorelease];
achievement.percentComplete= percentComplete;

关于iphone - 如果我有一个成就的标识符和percentComplete,是否可以将其转换为(GKAchievement *)成就?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6364647/

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