归档解档的简单回顾——由于数据解析的原理与此类似（面试也会问到）

骑猪看日落 2022-08-09 13:44 7阅读 0赞

新建工程

Person.h

//
    //  Person.h
    //  归档和解档
    //
    //  Created by apple on 15/10/26.
    //  Copyright (c) 2015年 LiuXun. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    /**
     归档和解档在开发中很少使用
     */
    
    @interface Person : NSObject<NSCoding>
    
    @property (nonatomic, copy) NSString *name;
    @property (nonatomic, assign) int age;
    
    @end

Person.m

//
    //  Person.m
    //  归档和解档
    //
    //  Created by apple on 15/10/26.
    //  Copyright (c) 2015年 LiuXun. All rights reserved.
    //
    
    #import "Person.h"
    @implementation Person
    
    /**
     归档
     */
    -(void)encodeWithCoder:(NSCoder *)aCoder
    {
        [aCoder encodeObject:_name forKey:@"name"];
        [aCoder encodeInt:_age forKey:@"age"];
    }
    
    /**
     解档
     将磁盘上保存的二进制数据转成自定义的对象
     */
    -(id)initWithCoder:(NSCoder *)aDecoder
    {
        if (self = [super init]) {
            _name = [aDecoder decodeObjectForKey:@"name"];
            _age = [aDecoder decodeIntForKey:@"age"];
        }
        return self;
    }
    
    @end

viewController.m

//
    //  ViewController.m
    //  归档和解档
    //
    //  Created by apple on 15/10/26.
    //  Copyright (c) 2015年 LiuXun. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "Person.h"
    @interface ViewController ()
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        //归档
        Person *p = [[Person alloc] init];
        p.name = @"张三";
        p.age = 23;
        
        [NSKeyedArchiver archiveRootObject:p toFile:@"/Users/apple/Desktop/a.plist"];
        
        // 解档
       Person *p1 =  [NSKeyedUnarchiver unarchiveObjectWithFile:@"/Users/apple/Desktop/a.plist"];
        NSLog(@"%@", p1.name);
    }
    
    @end