IOS遊戲中心成就

Question

如何通過NSCoding協議保存未上傳的成就？

Answer 1

if (! [NSKeyedArchiver archiveRootObject: myInterestingObject 
        toFile: reallyCoolArchivePath ]) {  
    NSLog(@" archiver write failed."); 
} else { 
    NSLog(@" archiver write SUCCEEDED."); 
} 

讓他們回到NSKeyedUnarchiver。