对象归档

朱雀 2022-08-05 00:49 155阅读 0赞

//
    //  FileUtil.h
    //  OC基础学习
    //
    //  Created by 麦子 on 15/5/26.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import <Foundation/Foundation.h>
    
    @interface FileUtil : NSObject
    
    
    +(BOOL) saveData;
    
    +(id)getData;
    
    
    +(bool)saveDataByKind;
    
    +(id)getDataByKind;
    
    
    
    @end

//
    //  FileUtil.m
    //  OC基础学习
    //
    //  Created by 麦子 on 15/5/26.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "FileUtil.h"
    
    /***其实就是数据的序列化，和反序列化*/
    
    @implementation FileUtil
    
    
    /**保存数据，加密数据--------------单独类型数据处理*/
    +(BOOL) saveData{
        NSArray *array = [NSArray arrayWithObjects:@"110",@"221",@"332", nil];
        NSString *homePath = NSHomeDirectory();
        NSLog(@"---path---%@",homePath);
        
        NSString *path = [homePath stringByAppendingPathComponent:@"NBA.com"];
        BOOL flag = [NSKeyedArchiver archiveRootObject:array toFile:path];
        
        return flag;
    };
    
    /**获取数据，解密数据－－－－－－－－－单独类型数据处理****/
    +(id)getData{
       
        NSString *homePath = NSHomeDirectory();
        NSString *path = [homePath stringByAppendingPathComponent:@"NBA.com"];
        NSArray *array = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
        NSLog(@"array--->%@",array);
        return array;
    
    };
    
    
    /**多种数据放到一个文件中，以Key， val的格式来进行保存*/
    +(bool)saveDataByKind{
        NSString *homePath = NSHomeDirectory();
        NSString *path = [homePath stringByAppendingPathComponent:@"abc.txt"];
        NSMutableData *data = [[NSMutableData alloc]init];
        NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
        [archiver encodeInt:100 forKey:@"age"];
        NSArray *array = [NSArray arrayWithObjects: @"1",@"2",@"3", nil];
        [archiver encodeObject:array forKey:@"array"];
        [archiver finishEncoding]; // 数据全部打入到Data中
        bool flag = [data writeToFile:path atomically:YES];
        if (flag) {
            NSLog(@"写入成功");
        }
        return flag;
    }
    
    
    
    
    /**获取多种种数据，以Key， val的格式来进行获取*/
    +(id)getDataByKind{
        NSString *homePath = NSHomeDirectory();
        NSString *path = [homePath stringByAppendingPathComponent:@"abc.txt"];
        NSData *data = [NSData dataWithContentsOfFile:path];
        NSKeyedUnarchiver *unArchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
        NSInteger age = [unArchiver decodeIntegerForKey:@"age"];
        long ageCount = age;
        NSArray *array = [unArchiver decodeObjectForKey:@"array"];
        NSLog(@"age-->%ld,array--->%@",ageCount,array);
        return array;
    }
    
    
    
    
    @end

自定义对象归档

//
    //  Ball.h
    //  OC基础学习
    //
    //  Created by 麦子 on 15/5/26.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import <Foundation/Foundation.h>
    
    @interface Ball : NSObject<NSCoding>
    
    @property(nonatomic,copy) NSString *brandName;
    @property(nonatomic,copy) NSString *address;
    
    +(BOOL) saveData:(Ball *) ball;
    +(BOOL) getData;
    
    @end

//
    //  Ball.m
    //  OC基础学习
    //
    //  Created by 麦子 on 15/5/26.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "Ball.h"
    
    /**实现NSCoding方法，重写加密和解密方法,这个只是写入数据到磁盘中。*/
    
    @implementation Ball
    
    #define BRANDNME @"brandName"
    #define ADDRESS @"address"
    
    /***加密*/
    - (void)encodeWithCoder:(NSCoder *)aCoder{
        
        [aCoder encodeObject:_brandName forKey:BRANDNME];
        [aCoder encodeObject:_address forKey:ADDRESS];
    
    
    }
    
    
    /**解密*/
    - (id)initWithCoder:(NSCoder *)aDecoder{
        self = [super init];
        if (self != nil) {
            self.brandName = [aDecoder decodeObjectForKey:BRANDNME];
            self.address = [aDecoder decodeObjectForKey:ADDRESS]; // 这里是copy的形式设置的，所以需要释放内存
        }
        return self;
    }
    
    +(BOOL) saveData:(Ball *) ball {
        NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"test.look"];
        BOOL flag = [NSKeyedArchiver archiveRootObject:ball toFile:path];
        if (flag) {
            NSLog(@"加密成功");
        }
        return flag;
    }
    
    
    +(BOOL) getData{
    
        NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"test.look"];
        Ball *ball = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
        NSLog(@"%@",ball);
        if (ball != nil) {
            NSLog(@"解密成功");
            return true;
        }
        return false;
    }
    
    /**这个相当于toString的方法*/
    -(NSString *)description{
    
        NSString *str = [NSString stringWithFormat:@"brandName-%@,address-%@", _brandName,_address];
        return str;
    }
    
    
    -(void)dealloc{
        [_brandName release];
        [_address release];
        [super dealloc];
    }
    
    
    
    @end

运行结果如下：

**2015-05-26 23:34:24.118 OC****基础学习****\[1210:61858\] ---path---/Users/maizi**

**2015-05-26 23:34:24.119 OC****基础学习****\[1210:61858\] array--->(**

**    110,**

**    221,**

**    332**

**)**

**2015-05-26 23:34:24.120 OC****基础学习****\[1210:61858\]** **写入成功**

**2015-05-26 23:34:24.120 OC****基础学习****\[1210:61858\] age-->100,array--->(**

**    1,**

**    2,**

**    3**