- (void)saveClassData:(NSMutableArray *)array{    if ([array count] > 0) {        NSMutableArray * classArray = nil;        //获取分类的沙盒文件路径        NSArray* myPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);        NSString* myDocPath = [myPaths objectAtIndex:0];        NSString* path = [myDocPath stringByAppendingPathComponent:@“info.plist”];        //解归档该路径下的文件        classArray = [NSKeyedUnarchiver unarchiveObjectWithFile:path];        if (classArray == nil) {            classArray = [[[NSMutableArray alloc] init] autorelease];        }                        [classArray removeAllObjects];        [classArray addObjectsFromArray:array];//            PPRSLog(@"归档前classArray : %@", classArray);        //将数据归档,如果前面的文件不存在，就会在归档数据时创建        [NSKeyedArchiver archiveRootObject:classArray toFile:path];    };}