复杂对象的本地化（以Person为例）

Person.h

 #import <Foundation/Foundation.h>

 @interface Person : NSObject <NSCoding>

 /// 姓名
 @property (nonatomic, copy) NSString *name;

 /// 性别
 @property (nonatomic, copy) NSString *gender;

 /// 年龄
 @property (nonatomic, assign) NSInteger age;

 @end

Person.m

 #import "Person.h"

 @implementation Person

 // 归档
 // 将所有属性进行归档
 - (void)encodeWithCoder:(NSCoder *)aCoder {

     [aCoder encodeObject:self.name forKey:@"name"];
     [aCoder encodeObject:self.gender forKey:@"gender"];
     [aCoder encodeInteger:self.age forKey:@"age"];
 }

 // 解档
 - (instancetype)initWithCoder:(NSCoder *)aDecoder {

     self = [super init];
     if (self) {
         self.name = [aDecoder decodeObjectForKey:@"name"];
         self.gender = [aDecoder decodeObjectForKey:@"gender"];
         self.age = [aDecoder decodeIntegerForKey:@"age"];
     }
     return self;
 }

 @end

ViewController.m

 #import "ViewController.h"
 #import "Person.h"

 @interface ViewController ()

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];

     // 如果把一个Person类型的对象存入本地，这个对象必须遵守NSCoding协议，实现协议中的两个方法

 #pragma mark - 复杂对象的本地化

     // 1.找到Documents文件夹的目录
     NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:];

     // 2.创建Person对象
     Person *person = [[Person alloc] init];
     person.name = @"卫庄";
     person.gender = @"男";
     person.age = ;

     // 3.把这些复杂对象归档并存储
     // 3.1 创建NSMutableData，用于初始化归档工具
     NSMutableData *data = [NSMutableData data];
     // 3.2 创建归档工具
     NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
     // 3.3 对需要归档的对象进行归档
     [archiver encodeObject:person forKey:@"person"];
     // 3.4 结束归档
     [archiver finishEncoding];
 //    NSLog(@"%@", data);

     // 4.将归档的内容NSMutableData存储到本地
     NSString *personPath = [documentPath stringByAppendingPathComponent:@"person.plist"];
     [data writeToFile:personPath atomically:YES];
     NSLog(@"%@", personPath);

 #pragma mark - 解档

     // 1.将要解档的数据找出来
     NSData *resultData = [NSData dataWithContentsOfFile:personPath];

     // 2.创建解档工具
     NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:resultData];

     // 3.对Person对象进行解档(要使用对象去接收)
     Person *newPerson = [unarchiver decodeObjectForKey:@"person"];

     // 4.结束解档
     [unarchiver finishDecoding];
     NSLog(@"name = %@, gender = %@, age = %ld", newPerson.name, newPerson.gender, newPerson.age);

 }

 @end