将Array、Dictionary等集合类的序列化和反序列化

Objective-C的集合类序列化到文件中或者从文件中反序列化其实很简单，请看下面的示例代码：

1.  
2. NSArray *array =  [ NSArray arrayWithObjects:
3.     @ "Hefeweizen", @ "IPA", @ "Pilsner", @ "Stout",  nil ];
4.  
5. NSDictionary *dictionary =  [ NSDictionary dictionaryWithObjectsAndKeys:
6.   array, @ "array", @ "Stout", @ "dark", @ "Hefeweizen", @ "wheat", @ "IPA",
7.   @ "hoppy",  nil ];
8.  
9. // 得到documents directory的路径
10. NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,
11.   NSUserDomainMask, YES );
12. if  ( [paths count ] >  0 )
13. {
14.    // Array的保存路径
15.    NSString  *arrayPath =  [ [paths objectAtIndex: 0 ]
16.       stringByAppendingPathComponent:@ "array.out" ];
17.  
18.    // dictionary的保存路径
19.    NSString  *dictPath =  [ [paths objectAtIndex: 0 ]
20.       stringByAppendingPathComponent:@ "dict.out" ];
21.  
22.    // 保存array
23.    [array writeToFile:arrayPath atomically:YES ];
24.  
25.    // 保存dictionary
26.    [dictionary writeToFile:dictPath atomically:YES ];
27.  
28.    // 从文件中读取回来
29.    NSArray *arrayFromFile =  [ NSArray arrayWithContentsOfFile:arrayPath ];
30.    NSDictionary *dictFromFile =  [ NSDictionary dictionaryWithContentsOfFile:dictPath ];
31.  
32.    for  ( NSString *element in arrayFromFile )
33.     NSLog (@ "Beer: %@", element );
34.  
35.    for  ( NSString *key in dictFromFile )
36.     NSLog (@ "%@ Style: %@", key,  [dictionary valueForKey:key ] );
37. }
38.  

输出如下：

http://blog.prosight.me/index.php/2010/02/582

转载于:https://www.cnblogs.com/1208/archive/2012/07/05/2578210.html