归档解档(文件写入与读取)

**第一种方式：对象单一**//归档-(void)NSKeyedArchiver{    NSArray *array = [NSArray arrayWithObjects:@"L",@"J",@"F",nil];    NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"array.LJF"];    NSLog(@"%@", filePath);    BOOL success = [NSKeyedArchiver archiveRootObject:array toFile:filePath];    if(success){        NSLog(@"保存成功");    }}//解档-(void)NSKeyedUnarchiver{    NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"array.LJF"];    id array = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];    NSLog(@"%@",array);}

**第二种方式：对象多个**//归档2-(void)NSKeyedArchiverTwo{    NSArray *array = [NSArray arrayWithObjects:@"L",@"J",@"F", nil];    NSDictionary *dic = @{@"name":array};    NSMutableData *data = [NSMutableData data];    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];    //编码    [archiver encodeObject:dic forKey:@"dic"];    [archiver encodeObject:array forKey:@"array"];    [archiver encodeInt:100 forKey:@"num"];    [archiver encodeObject:@"LJF" forKey:@"name"];    //完成编码，将上面的归档数据填充到data中，此时data中已经存储了归档对象的数据    [archiver finishEncoding];    NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"array.LJF"];    BOOL success = [data writeToFile:filePath atomically:YES];    if(success){        NSLog(@"归档成功");    }}//解档2-(void)NSKeyedUnarchiverTwo{    NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"array.LJF"];    //读取归档数据    NSData *data = [[NSData alloc] initWithContentsOfFile:filePath];    //创建解归档对象，对data中的数据进行解归档    NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];    //解归档    NSArray *array = [unarchiver decodeObjectForKey:@"array"];    NSLog(@"%@",array);    NSDictionary *dic  = [unarchiver decodeObjectForKey:@"dic"];    NSLog(@"%@", dic);    NSString *name = [unarchiver decodeObjectForKey:@"name"];    NSLog(@"%@",name);    int value =  [unarchiver decodeIntegerForKey:@"num"];    NSLog(@"%d", value);}