这里的归档主要是用于自定义类的归档和解档。我们这里使用NSKeyedArchiver和NSKeyedUnarchiver来归档和解档。
注意：自己定义的类需要实现<NSCoding>，如：@interface User : NSObject <NSCoding>，并实现Coding中相应的方法。
/*************************************User.h*************************************/
//
// User.h
// customContentArchiveDemo
//
// Created by Warrior on 14-1-7.
// Copyright (c) 2014年 Warrior. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface User : NSObject <NSCoding>
@property(nonatomic,copy)NSString *name;
@property(nonatomic,copy)NSString *email;
@property(nonatomic,copy)NSString *passWord;
@property(nonatomic,assign)int age;
@end
/*************************************User.m*************************************/
//
// User.m
// customContentArchiveDemo
//
// Created by Warrior on 14-1-7.
// Copyright (c) 2014年 Warrior. All rights reserved.
//
#import “User.h”
#define NAME @“name”
#define EMAIL @“email”
#define PASSWORD @“passWord”
#define AGE @“age”
@implementation User
@synthesize name;
@synthesize email;
@synthesize passWord;
@synthesize age;
//对属性解码，解档的时候调用
- (id)initWithCoder:(NSCoder *)aDecoder
{
if(self = [super init])
{
//注意这里要添加self
name = [aDecoder decodeObjectForKey:NAME];
email = [aDecoder decodeObjectForKey:EMAIL];
passWord = [aDecoder decodeObjectForKey:PASSWORD];
age = [aDecoder decodeIntForKey:AGE];
}
return self;
}
//对属性编码，归档的时候调用
- (void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:name forKey:NAME];
[aCoder encodeObject:email forKey:EMAIL];
[aCoder encodeObject:passWord forKey:PASSWORD];
[aCoder encodeInt:age forKey:AGE];
}
@end
使用归档和解档的方法来实现保存数据。
/*************************************main.m*************************************/
//
// main.m
// customContentArchiveDemo
//
// Created by Warrior on 14-1-7.
// Copyright (c) 2014年 Warrior. All rights reserved.
//
#import <Foundation/Foundation.h>
#import “User.h”
int main(int argc, const char * argv[])
{
@autoreleasepool {
//归档
NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@”user.archive”];
NSFileManager *fileManger = [NSFileManager defaultManager];
if(![fileManger fileExistsAtPath:filePath])
[fileManger createFileAtPath:filePath contents:nil attributes:nil];
User *user = [[User alloc] init];
user.name = @”Warrior Sun”;
user.email = @”suenihy@hotmail.com”;
user.passWord = @”123456”;
user.age = 27;
if([NSKeyedArchiver archiveRootObject:user toFile:filePath])
{
NSLog(@”归档成功”);
}
//解档
User *unUser = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
NSLog(@”User name:%@”, unUser.name);
}
return 0;
}
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要保存基本数据类型，如int,NSString等，可以将user的变量修改为相应的基本类型变量。