文件操作---沙盒路径

     // 1.路径
    // NSString *path = [self getDocumetnPath];
    // 2.创建文件
    // path = [path stringByAppendingString:@"/my.txt"]; // 加/***在路径目录---文件夹下
     // 3.写入文件
     // NSString *name = @"百川";
     // [name writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil]; // 字符串写入沙盒
    
    // 数组写入文件
    /*NSString *path = [self getDocumetnPath];
     NSLog(@"%@",path);
    
     path = [path stringByAppendingString:@"/array.txt"]; // plist---写plist文件
     NSArray *nameArray = @[@"百川",@"隋松",@"徐光耀",@"三毛"];
     [nameArray writeToFile:path atomically:YES];
    */
    // 字典写入文件
    /*
     NSString *path = [self getDocumetnPath];
     NSLog(@"%@",path);
     path = [path stringByAppendingString:@"/dict.plist"]; // 字典写成plist文件
     NSDictionary *dict = @{@"男":@[@"1",@"2",@"6"],@"女":@[@"x",@"y",@"z"]};
    
     [dict writeToFile:path atomically:YES];
    */
    
    // NSData(二进制)写入文件
   /*
    NSString *path = [self getDocumetnPath];
    NSLog(@"%@",path);
    path = [path stringByAppendingString:@"/data"];
    
    NSString *string = @"hehheheh呵呵ehehheehe";
    NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
    
    NSLog(@"%@",data);
    [data writeToFile:path atomically:YES];
    */
    
    // 读取沙盒文件的内容 ****** 内容结构
    /*
     
    NSString *path = [self getDocumetnPath];
    NSLog(@"%@",path);
    path = [path stringByAppendingString:@"/dict.plist"];
    NSDictionary *readDic = [NSDictionary dictionaryWithContentsOfFile:path];
    NSLog(@"%@",readDic);
     
   */
    
    /**
      IOS中只有NSString NSArray NSDictionry NSData（以及他们的可变类）可以直接在沙盒里面写入，其他的不可以***数组 
      字典等容器里面存储的数据必须是上述的数据
     
     */
    

    // 复杂对象
   
    /*
    Person *p = [[Person alloc] init];
    p.name = @"三毛";
    p.sex = @"男";
    
    NSString *path = [self getDocumetnPath];
    NSLog(@"%@",path);
    path = [path stringByAppendingString:@"/person"];
    
    // 归档把person存入沙盒中
    // 1.创建一个可变的二进制数据对象
    NSMutableData *data = [NSMutableData data];
    // 2.根据data创建归档对象
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    // 3.对person进行编码
    [archiver encodeObject:p forKey:@"aperson"];
    // 4.结束编码（归档）
    [archiver finishEncoding]; // 很重要
    // 把data存入沙盒中
    [data writeToFile:path atomically:YES];
   */
 

   
   /*
    Teacher *ate = [[Teacher alloc] init];
    ate.name = @"哈哈哈";
    ate.age = @"30";
    
    NSString *path1 = [self getDocumetnPath];
    path1 = [path1 stringByAppendingString:@"/techer"];
    
    NSMutableData *teaData = [NSMutableData data];
    NSKeyedArchiver *teaArchiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:teaData];
    [teaArchiver encodeObject:ate forKey:@"atecher"];
    [teaArchiver finishEncoding];
    [teaData writeToFile:path1 atomically:YES];
  
    */
    
    
    // 取出teacher对象---反归档
   
    /*
    // 1.找路径
    NSString *path = [[self getDocumetnPath] stringByAppendingString:@"/techer"];
    // 2.根据路取出二进制data
    NSData *data = [NSData dataWithContentsOfFile:path];
    // 3.根据取出的data（二进制数据）---创建NSKeyedUAnrchiver对象
    NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
    // 4.根据归档时的key值拿出teacher对象 ****** 解码******
    Teacher *teacher = [unarchiver decodeObjectForKey:@"atecher"];
    // 5.结束反归档
    [unarchiver finishDecoding];
    
    NSLog(@"%@ %@",teacher.name,teacher.age);

     */