[iOS基础控件 - 6.11.5] 沙盒 & 数据存储

 1 - (IBAction)save {
 2 
 3 //    NSString *path = @"/Users/hellovoidworld/Library/Developer/CoreSimulator/Devices/87B56173-7E1C-466A-A03E-1CB2160B88E3/data/Containers/Data/Application/7FB97B7E-5A67-498D-AA0B-A8FCEDE19121/Documents";
 4 
 5     // 1.获得沙盒路径
 6     NSString *path = NSHomeDirectory();
 7    
 8     // 2.Document路径
 9     NSString *docPath = [path stringByAppendingPathComponent:@"Documents"];
10 
11     // 3.新建数据
12     NSArray *data = @[@"jack", @10, @"aaaaa"];
13     NSString *filePath = [docPath stringByAppendingPathComponent:@"data.plist"];
14    
15     NSLog(@"%@", filePath);
16    
17     [data writeToFile:filePath atomically:YES];
18 }
19 
20 - (IBAction)read {
21     // 1.获得沙盒路径
22     NSString *path = NSHomeDirectory();
23    
24     // 2.Document路径
25     NSString *docPath = [path stringByAppendingPathComponent:@"Documents"];
26    
27     NSString *filePath = [docPath stringByAppendingPathComponent:@"data.plist"];
28    
29     NSArray *array = [NSArray arrayWithContentsOfFile:filePath];
30    
31     NSLog(@"%@", array);
32 }

 1 - (IBAction)preferenceSave {
 2     // 1.利用NSUserDefaults，就能直接访问app的偏好设置(Library/Preferences)
 3     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
 4    
 5     // 2.存储数据
 6     [defaults setObject:@"simon" forKey:@"name"];
 7     [defaults setInteger:11 forKey:@"age"];
 8     [defaults setBool:YES forKey:@"true"];
 9    
10     // 3.立刻同步
11     [defaults synchronize];
12 }
13 
14 - (IBAction)preferenceRead {
15     // 1.利用NSUserDefaults，就能直接访问app的偏好设置(Library/Preferences)
16     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
17    
18     // 2.读取数据
19     NSString *name = [defaults objectForKey:@"name"];
20     int age = [defaults integerForKey:@"age"];
21     BOOL t = [defaults boolForKey:@"true"];
22    
23     NSLog(@"%@ - %d - %d", name, age, t);
24 }

 1 //
 2 //  Person.h
 3 //  Archive
 4 //
 5 //  Created by hellovoidworld on 14/12/25.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 #import <Foundation/Foundation.h>
10 
11 @interface Person : NSObject <NSCoding>
12 
13 @property(nonatomic, copy) NSString *name;
14 @property(nonatomic, assign) int age;
15 @property(nonatomic, assign) double height;
16 
17 @end

 1 //
 2 //  Person.m
 3 //  Archive
 4 //
 5 //  Created by hellovoidworld on 14/12/25.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 #import "Person.h"
10 
11 @implementation Person
12 
13 #pragma mark - 将对象归档的时候调用的协议方法
14 /**
15 * 哪些属性需要存储
16 * 用什么方法存储
17 */
18 - (void)encodeWithCoder:(NSCoder *)aCoder {
19     [aCoder encodeObject:_name forKey:@"name"];
20     [aCoder encodeInt:_age forKey:@"age"];
21     [aCoder encodeDouble:_height forKey:@"height"];
22 }
23 
24 #pragma mark - 从文件读取对象调用的协议方法
25 /**
26 * 哪些属性需要读取
27 * 用什么方法读取
28 */
29 - (id)initWithCoder:(NSCoder *)aDecoder {
30     if (self = [super init]) {
31         self.name = [aDecoder decodeObjectForKey:@"name"];
32         self.age = [aDecoder decodeIntForKey:@"age"];
33         self.height = [aDecoder decodeDoubleForKey:@"height"];
34     }
35 
36     return self;
37 }
38 
39 @end

 1 - (IBAction)objectSave {
 2     // 指定保存路径
 3     NSString *path = @"/Users/hellovoidworld/Study/iOS/0410";
 4    
 5     // 扩展名.data只是我随便取的
 6     NSString *filePath = [path stringByAppendingPathComponent:@"p.data"];
 7    
 8     // 创建一个对象
 9     Person *p = [[Person alloc] init];
10     p.name = @"simon";
11     p.age = 11;
12     p.height = 166.00;
13    
14     // 存储到文件
15     [NSKeyedArchiver archiveRootObject:p toFile:filePath];
16 }
17 
18 - (IBAction)objectRead {
19     // 指定文件路径
20     NSString *filePath = @"/Users/hellovoidworld/Study/iOS/0410/p.data";
21    
22     // 读取文件
23     Person *p = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
24    
25     NSLog(@"%@ - %d - %f", p.name, p.age, p.height);
26 }