ios中本地化存储的方式之一，个人觉得跟PList的方式类似。只是我们不需要加载从Plist获得字典后再人为去做一遍字典转模型

storyboard中加上两个按钮：归档,修改和接档

屏幕快照 2016-07-17 上午11.15.24.png

mark --- 需要实现归档接单的类

//
//  Person.h
//  test
//
//  Created by lh0811 on 16/7/17.
//  Copyright © 2016年 lh0811. All rights reserved.
//

#import <Foundation/Foundation.h>
//要让一个类实现归档接档，只需要醉寻NSCoding协议，并实现协议方法即可
@interface Person : NSObject<NSCoding>

@property (nonatomic,copy) NSString * name;
@property (nonatomic,assign) NSInteger age;

@end

//
//  Person.m
//  test
//
//  Created by lh0811 on 16/7/17.
//  Copyright © 2016年 lh0811. All rights reserved.
//

#import "Person.h"

@implementation Person

- (void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:_name forKey:@"name"];
    [aCoder encodeInteger:_age forKey:@"age"];
}
- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder{
    self = [super init];
    if (self) {
        _name = [aDecoder decodeObjectForKey:@"name"];
        _age = [aDecoder decodeIntegerForKey:@"age"];
    }
    return self;
}

@end

mark --- 我们看看NSCoding里面都有神马

@protocol NSCoding

- (void)encodeWithCoder:(NSCoder *)aCoder;
- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder; // NS_DESIGNATED_INITIALIZER

@end

好吧 除了这两个方法也没啥了。。。

mark --- VC 中实现归档 解档

//
//  ViewController.m
//  test
//
//  Created by lh0811 on 16/7/17.
//  Copyright © 2016年 lh0811. All rights reserved.
//

#import "ViewController.h"
#import "Person.h"
@interface ViewController ()

@end

@implementation ViewController

//点击归档
- (IBAction)clickGuiDang:(id)sender {
    Person * p = [[Person alloc]init];
    p.name = @"张三";
    p.age = 12;
    NSString * home = NSHomeDirectory();
    NSString * fileStr = [home stringByAppendingPathComponent:@"p.archive"];
    [NSKeyedArchiver archiveRootObject:p toFile:fileStr];
    NSLog(@"归档:%@",fileStr);
}

//点击修改
- (IBAction)clickXiuGai:(id)sender {
    NSString * home = NSHomeDirectory();
    NSString * fileStr = [home stringByAppendingPathComponent:@"p.archive"];
    id obj = [NSKeyedUnarchiver unarchiveObjectWithFile:fileStr];
    NSLog(@"%@",obj);
    Person * p = (Person *)obj;
    p.name = @"李四";
    p.age = 16;
    [NSKeyedArchiver archiveRootObject:p toFile:fileStr];
    NSLog(@"归档:%@",fileStr);
    
}

//点击接档
- (IBAction)clickJieDang:(id)sender {
    NSString * home = NSHomeDirectory();
    NSString * fileStr = [home stringByAppendingPathComponent:@"p.archive"];
    id obj = [NSKeyedUnarchiver unarchiveObjectWithFile:fileStr];
    NSLog(@"%@",obj); 
    Person * p = (Person *)obj;
    NSLog(@"%@",p.name);
    NSLog(@"%ld",p.age);
}

@end

mark --- 点击归档 再点击解档 输出结果

2016-07-17 11:11:19.369 test[1948:80172] <Person: 0x7ff5f0569550>
2016-07-17 11:11:19.369 test[1948:80172] 张三
2016-07-17 11:11:19.369 test[1948:80172] 12

mark --- 点击归档->解档 ->修改 ->解档 输出结果

2016-07-17 11:17:25.688 test[1985:86318] 归档:/Users/lh0811/Library/Developer/CoreSimulator/Devices/FB15308A-1108-4C64-8AF1-5B69CF31ABB4/data/Containers/Data/Application/E369A323-FB72-4B19-B2A6-C288F60507D3/p.archive
2016-07-17 11:17:50.358 test[1985:86318] 归档:/Users/lh0811/Library/Developer/CoreSimulator/Devices/FB15308A-1108-4C64-8AF1-5B69CF31ABB4/data/Containers/Data/Application/E369A323-FB72-4B19-B2A6-C288F60507D3/p.archive
2016-07-17 11:17:52.100 test[1985:86318] <Person: 0x7fb0c1e0c960>
2016-07-17 11:17:52.100 test[1985:86318] 张三
2016-07-17 11:17:52.100 test[1985:86318] 12
2016-07-17 11:17:53.081 test[1985:86318] <Person: 0x7fb0c1e0d910>
2016-07-17 11:17:53.082 test[1985:86318] 归档:/Users/lh0811/Library/Developer/CoreSimulator/Devices/FB15308A-1108-4C64-8AF1-5B69CF31ABB4/data/Containers/Data/Application/E369A323-FB72-4B19-B2A6-C288F60507D3/p.archive
2016-07-17 11:17:54.134 test[1985:86318] <Person: 0x7fb0c1e02800>
2016-07-17 11:17:54.134 test[1985:86318] 李四
2016-07-17 11:17:54.134 test[1985:86318] 16