OC-归档和解归档

//归档:将对象数据存储到文件的过程  NSArchiver
//反归档:从文件中读取数据到对象中的过程

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        
#if 0
        //使用系统的方法进行归档  NSArchiver
        NSDictionary *mutDic = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"111",@"one",@"222",@"two", nil];
        [mutDic setValue:[NSDate date] forKey:@"date"];
        [mutDic setValue:[NSNumber numberWithInteger:8889] forKey:@"num"];
        [mutDic setValue:[@"ios" dataUsingEncoding:NSUTF8StringEncoding] forKey:@"data"];
        
        BOOL flag = [NSArchiver archiveRootObject:mutDic toFile:@"/Users/qianfeng/Desktop/day21-OC11_时间类/day21_OC11_归档与反归档/arch.txt"];
        if (flag) {
            NSLog(@"文件归档成功");
        }else{
            NSLog(@"文件归档失败");
        }

#endif
        
#if 0
        //使用系统进行反归档  NSUnarchiver
        NSDictionary *dict1 = [NSUnarchiver unarchiveObjectWithFile:@"/Users/qianfeng/Desktop/day21-OC11_时间类/day21_OC11_归档与反归档/arch.txt"];
        if (dict1) {
            NSLog(@"dict = %@",dict1);
        }
#endif

//#if 0
        //使用系统的方法进行归档  NSKeyedArchiver
        NSDictionary *mutDic = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"111",@"one",@"222",@"two", nil];
        [mutDic setValue:[NSDate date] forKey:@"date"];
        [mutDic setValue:[NSNumber numberWithInteger:8889] forKey:@"num"];
        [mutDic setValue:[@"ios" dataUsingEncoding:NSUTF8StringEncoding] forKey:@"data"];
        
        NSData *data = [NSKeyedArchiver archivedDataWithRootObject:mutDic];
        BOOL ret = [data writeToFile:@"/Users/qianfeng/Desktop/day21-OC11_json_归档和解归档类/day21_OC11_归档与反归档/lpj.plist" atomically:YES];
        if (ret) {
            NSLog(@"归档成功");
        }
        else{
            NSLog(@"归档失败");
        }
     
//#endif
        
#if 0
        //解归档
        NSData *data = [NSData dataWithContentsOfFile:@"/Users/qianfeng/Desktop/day21-OC11_json_归档和解归档类/day21_OC11_归档与反归档/lpj.plist"];
       //NSDictionary *dict = [NSKeyedUnarchiver unarchiveObjectWithFile:@"/Users/qianfeng/Desktop/day21-OC11_时间类/day21_OC11_归档与反归档/data.txt"];
        NSDictionary *dict = [NSKeyedUnarchiver unarchiveObjectWithData:data];
        if (dict) {
            NSLog(@"解归档成功");
            NSLog(@"%@",dict);
        }else{
            NSLog(@"解归档失败");
            
        }
#endif
        
#if 0
        //  NSSearchPathForDirectoriesInDomains 这个主要就是返回一个绝对路径用来存放我们需要储存的文件。
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:@"shoppingCar.plist"];
#endif
        
        
    }
    
    
    @autoreleasepool {
        
#if 0
        
        //手动归档 - (instancetype)initForWritingWithMutableData:(NSMutableData *)data;
        
        //创建一个可变的数据对象
        NSMutableData *mulData = [[NSMutableData alloc] init];
        
        
        NSKeyedArchiver *keyArchiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:mulData];
        //数组对象
        NSArray *array = [NSArray arrayWithObjects:@"one",[NSNumber numberWithInteger:1111],[NSDate date],[@"i love ios" dataUsingEncoding:NSUTF8StringEncoding], nil];
        //字典对象
        NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:@"111",@"one",array,@"array",[NSNumber numberWithInt:1212],@"num",[NSDate date],@"date", nil];
        
        //对数组和字典进行编码 原理：其实是是将数组array和字典dict对象写入到可变数据对象mulData中。之后在利用muData的writeToFile将二进制数据写入到文档中
        [keyArchiver encodeObject:array forKey:@"array"];
        [keyArchiver encodeObject:dict forKey:@"dict"];
        
        //编码结束一定需要调用finishEncoding方法
        [keyArchiver finishEncoding];
        
        //写入文件
        BOOL flag = [mulData writeToFile:@"/Users/qianfeng/Desktop/day21-OC11_时间类/day21_OC11_归档与反归档/initForWritingWithMutableData.txt" atomically:YES];
        if (flag) {
            NSLog(@"归档成功");
        }else{
            NSLog(@"归档失败");
        }
        
#endif
        
#if 0
        //手动解归档
        //过程 1.首先创建一个NSData对象，并读取文件的内容  2.通过NSKeyedUnarchiver 的 initForReadingWithData方法从数据对象中解归档对象  3.通过关键字从解归档对象中获取数组对象和字典对象
        NSData *data = [NSData dataWithContentsOfFile:@"/Users/qianfeng/Desktop/day21-OC11_时间类/day21_OC11_归档与反归档/initForWritingWithMutableData.txt"];
        NSKeyedUnarchiver *keyUnarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
        
        //通过关键字 解码数组
        NSArray *array = [keyUnarchiver decodeObjectForKey:@"array"];
        //通过关键字 解码字典
        NSDictionary *dict = [keyUnarchiver decodeObjectForKey:@"dict"];
        
        [keyUnarchiver finishDecoding];
        
        NSLog(@"array = %@",array);
        NSLog(@"dict = %@",dict);
        
#endif
    }
    return 0;
}

归档：将程序中的对象写入到文件的过程

解归档：将文件中的数据读取为程序中的对象的过程