IOS数据持久化NSKeyedArchiver使用

1定义一个AddressCard类,等会将该类实例化一个对象存入NSKeyedArchiver.

1//
2//  AddressCard.h
3//  NSKeyedArchiverDemo
4//
5//  Created by 　罗若文 on 2016/11/2.
6//  Copyright © 2016年 罗若文. All rights reserved.
7//  参考http://www.cnblogs.com/xiaobaizhu/p/4011332.html
8/**
9 归档需要注意的是：
10 1.同一个对象属性，编码/解码的key要相同！
11 2.每一种基本数据类型，都有一个相应的编码/解码方法。
12 如：encodeObject方法与decodeObjectForKey方法，是成对出现的。
13 3.如果一个自定义的类A，作为另一个自定义类B的一个属性存在；那么，如果要对B进行归档，那么，B要实现NSCoding协议。并且，A也要实现NSCoding协议。
14 */
15
16#import <Foundation/Foundation.h>
17
18@interface AddressCard : NSObject<NSCoding>//要用NSKeyedArchiver存储就要申明实现NSCoding协议
19@property NSString *name;
20@property NSString *email;
21@property int salary;
22
23-(void)print;
24@end
25
26
27//
28//  AddressCard.m
29//  NSKeyedArchiverDemo
30//
31//  Created by 　罗若文 on 2016/11/2.
32//  Copyright © 2016年 罗若文. All rights reserved.
33//
34
35#import "AddressCard.h"
36
37@implementation AddressCard
38
39-(void)print{
40    NSLog(@"姓名:%@   邮箱:%@   薪水:%d",self.name,self.email,self.salary);
41}
42
43
44#pragma mark- ----------NSCoding协议-需要实现以下的encodeWithCoder和initWithCoder都是成对出现.每个属性都要进行设置,对应的key都要相同---------
45- (void)encodeWithCoder:(NSCoder *)aCoder{
46    [aCoder encodeObject:self.name forKey:@"AddressCard_name"];
47    [aCoder encodeObject:self.email forKey:@"AddressCard_email"];
48    [aCoder encodeInt:self.salary forKey:@"AddressCard_salary"];
49    
50}
51- (id)initWithCoder:(NSCoder *)aDecoder{
52    self.name=[aDecoder decodeObjectForKey:@"AddressCard_name"];
53    self.email=[aDecoder decodeObjectForKey:@"AddressCard_email"];
54    self.salary=[aDecoder decodeIntForKey:@"AddressCard_salary"];
55    return self;
56}
57@end

然后接下来就是使用

1//
2//  ViewController.m
3//  NSKeyedArchiverDemo
4//
5//  Created by 　罗若文 on 2016/11/2.
6//  Copyright © 2016年 罗若文. All rights reserved.
7//
8
9#import "ViewController.h"
10#import "AddressCard.h"
11
12@interface ViewController ()
13
14@end
15
16@implementation ViewController
17
18- (void)viewDidLoad {
19    [super viewDidLoad];
20    
21    [self.view setBackgroundColor:[UIColor whiteColor]];
22    
23    //获得文件路径 用来放NSKeyedArchiver
24    NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
25    NSString *filePath = [documentPath stringByAppendingPathComponent:@"file.archiver"];
26    
27    AddressCard *obj=[[AddressCard alloc]init];
28    obj.name=@"luoruowen";
29    obj.email=@"luoruowen@vip.qq.com";
30    obj.salary=5000;
31    BOOL isSuccess=NO;
32    
33    //将AddressCard对象存入NSKeyedArchiver 这边可以存入任何对象数据,取出来的也是对应的对象数据
34    isSuccess= [NSKeyedArchiver archiveRootObject:obj toFile:filePath];
35    if (isSuccess) {
36        NSLog(@"Success");
37    }else{
38        NSLog(@"False");
39    }
40    
41    // 反归档 取出AddressCard对象
42    AddressCard *objTmp=[NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
43    [objTmp print];
44    
45}
46
47
48- (void)didReceiveMemoryWarning {
49    [super didReceiveMemoryWarning];
50    // Dispose of any resources that can be recreated.
51}
52
53
54@end

当然不止存对象, 平常的数据也是可以存储,存入什么取出来的就是什么.