OC 数据持久化（数据本地化）- 本地存储

 1 //
 2 //  ViewController.m
 3 //  IOS_0113_本地存储
 4 //
 5 //  Created by ma c on 16/1/13.
 6 //  Copyright (c) 2016年 博文科技. All rights reserved.
 7 //
 8 
 9 #import "ViewController.h"
10 #import "BWLoginDataModel.h"
11 #import "BWSecondViewController.h"
12 
13 @interface ViewController ()
14 
15 @end
16 
17 @implementation ViewController
18 /*
19  数据本地化（数据持久化）- 本地存储
20  1.NSUserDefault属性列表存储 - 轻量级数据，存储类型有限
21  2.归档 - 大量数据，存储类型能够扩展到自定义对象
22  3.本地数据库
23  
24  无论是属性列表仍是归档，都是将数据保存到后台，前端任意一个界面都能访问
25  */
26 
27 - (void)viewDidLoad {
28     [super viewDidLoad];
29     /*
30      归档 - 本地化数据模型
31      <NSCoding> - 要对哪一个类的对象进行归档，就让哪一个类实现这个协议
32      */
33     self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];
34     UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(changeView)];
35     [self.view addGestureRecognizer:tap];
36     
37     BWLoginDataModel *loginModel = [[BWLoginDataModel alloc] init];
38     loginModel.name = @"123456";
39     loginModel.password = @"654321";
40     
41     //沙盒路径 - 每个应用都有本身的沙盒，IOS机制
42     NSString *filePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0] stringByAppendingPathComponent:@"account.data"];
43     //NSLog(@"%@",filePath);
44     
45     //将一个归档对象归档到目录下
46     if ([NSKeyedArchiver archiveRootObject:loginModel toFile:filePath]) {
47         NSLog(@"归档成功");
48     }
49     else
50         NSLog(@"归档失败");
51     
52 }
53 
54 - (void)changeView
55 {
56     BWSecondViewController *secondVC = [[BWSecondViewController alloc] init];
57     
58     [self presentViewController:secondVC animated:YES completion:nil];
59 }
60 
61 #pragma mark - 属性列表基础
62 - (void)useUserDefault
63 {
64     /*
65      //属性列表NSUserDefault(全局惟一，不用建立)
66      
67      某些数据当存储本地以后，下次再次调用的时候，不用再次从新赋值，而是从本地直接获取
68      若是没有必要，别向属性列表存储大量数据
69      通常用来存储简单的全局都能使用到的数据
70      e.g. DeviceToken 设备令牌
71      SessionID   安全口令
72      ps:属性列表的存储和读取速度都是及时的，而归档和数据库都是有存储延时的
73      pss：自动登陆
74      把用户的帐号，密码存储到属性列表中
75      
76      */
77     //    NSString *str = @"bowen";
78     //    [[NSUserDefaults standardUserDefaults] setObject:str forKey:@"sister"];
79     //    NSString *newStr = [[NSUserDefaults standardUserDefaults] objectForKey:@"sister"];
80     //    NSLog(@"%@",newStr);
81     //    NSLog(@"%@",[[NSUserDefaults standardUserDefaults] dictionaryRepresentation]);
82     
83     //注意别删除错了
84     //[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"sister"];
85     //NSLog(@"%@",newStr);
86     
87 }
88 
89 - (void)didReceiveMemoryWarning {
90     [super didReceiveMemoryWarning];
91     // Dispose of any resources that can be recreated.
92 }
93 
94 @end

 

 1 //
 2 //  BWSecondViewController.m
 3 //  IOS_0113_本地存储
 4 //
 5 //  Created by ma c on 16/1/13.
 6 //  Copyright (c) 2016年 博文科技. All rights reserved.
 7 //
 8 
 9 #import "BWSecondViewController.h"
10 #import "BWLoginDataModel.h"
11 
12 @interface BWSecondViewController ()
13 
14 @end
15 
16 @implementation BWSecondViewController
17 
18 - (void)viewDidLoad {
19     [super viewDidLoad];
20     self.view.backgroundColor = [UIColor cyanColor];
21 
22     //解档
23     NSString *filePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0] stringByAppendingPathComponent:@"account.data"];
24     BWLoginDataModel *dataModel = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
25     NSLog(@"%@",dataModel);
26 }
27 
28 - (void)didReceiveMemoryWarning {
29     [super didReceiveMemoryWarning];
30     // Dispose of any resources that can be recreated.
31 }
32 
33 @end

 1 //
 2 //  BWLoginDataModel.h
 3 //  IOS_0113_本地存储
 4 //
 5 //  Created by ma c on 16/1/13.
 6 //  Copyright (c) 2016年 博文科技. All rights reserved.
 7 //
 8 
 9 #import <Foundation/Foundation.h>
10 
11 @interface BWLoginDataModel : NSObject<NSCoding>
12 
13 
14 @property (nonatomic, copy) NSString *name;
15 @property (nonatomic, copy) NSString *password;
16 
17 
18 @end
19 
20 
21 //
22 //  BWLoginDataModel.m
23 //  IOS_0113_本地存储
24 //
25 //  Created by ma c on 16/1/13.
26 //  Copyright (c) 2016年 博文科技. All rights reserved.
27 //
28 
29 #import "BWLoginDataModel.h"
30 
31 @implementation BWLoginDataModel
32 
33 - (NSString *)description
34 {
35     return [NSString stringWithFormat:@"name:%@ password:%@", self.name,self.password];
36 }
37 
38 #pragma mark - 归档方法
39 - (void)encodeWithCoder:(NSCoder *)aCoder
40 {
41     //按照规定的Key对属性进行编码操做
42     [aCoder encodeObject:self.name forKey:@"name"];
43     [aCoder encodeObject:self.password forKey:@"password"];
44     
45 }
46 #pragma mark - 解档方法
47 - (id)initWithCoder:(NSCoder *)aDecoder
48 {
49     self = [super init];
50     if (self) {
51         //归档和解档的key能够随意写，但他们属性对应的key必须相同
52         _name = [aDecoder decodeObjectForKey:@"name"];
53         _password = [aDecoder decodeObjectForKey:@"password"];
54     }
55     return self;
56 }
57 
58 @end