thmodel_ios_model/model/Classes/Controllers/Model/ModelUser.m

//
//  ModelUser.m
//  model
//
//  Created by JuYi on 2018/7/18.
//  Copyright © 2018年 Mine. All rights reserved.
//

#import "ModelUser.h"
// 账号的存储路径
#define YanCAccountFilePath [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"model.data"]

@implementation ModelUser


+(ModelUser *)modelUser
{
    __strong static ModelUser *modelUser;
    
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        modelUser = [[ModelUser alloc] init];
    });
    
    return modelUser;
}

//编码方法，当对象被编码成二进制数据时调用。
-(void)encodeWithCoder:(NSCoder *)aCoder {
    //在编码方法中，需要对对象的每一个属性进行编码。
    [aCoder encodeObject:_pk forKey:@"pk"];
    [aCoder encodeObject:_modelpk forKey:@"modelpk"];
    [aCoder encodeObject:_coin_a forKey:@"coin_a"];
    [aCoder encodeObject:_coin_ir forKey:@"coin_ir"];
}

//解码方法，当把二进制数据转成对象时调用。
-(instancetype)initWithCoder:(NSCoder *)aDecoder {
    //如果父类也遵守NSCoding协议，那么需要写self = [super initWithCoder]
    self = [super init];
    if (self) {
        _pk = [aDecoder decodeObjectForKey:@"pk"];
        _modelpk = [aDecoder decodeObjectForKey:@"modelpk"];
        _coin_a = [aDecoder decodeObjectForKey:@"coin_a"];
        _coin_ir = [aDecoder decodeObjectForKey:@"coin_ir"];
    }
    return self;
}

/**
 *  存储帐号
 */

+ (void)save:(ModelUser *)user {
    // 归档 1
    //    [NSKeyedArchiver archiveRootObject:user toFile:YanCAccountFilePath];
    //新的方法归档 2
    //准备路径: YanCAccountFilePath
    
    //1:准备存储数据的对象
    NSMutableData *data = [NSMutableData data];
    //2:创建归档对象
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    //3:开始归档
    [archiver encodeObject:user forKey:@"user"];
    //4:完成归档
    [archiver finishEncoding];
    //5:写入文件当中
    [data writeToFile:YanCAccountFilePath atomically:YES];
  
}

/**
 *  读取帐号
 */
+ (ModelUser *)user {
    //反归档1
    //    YanCBMUser *user = [NSKeyedUnarchiver unarchiveObjectWithFile:YanCAccountFilePath];

    //反归档2
    //准备解档路径
    NSData *myData = [NSData dataWithContentsOfFile:YanCAccountFilePath];
    //创建反归档对象
    NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:myData];
    //反归档
    //    YanCBMUser *user = [YanCBMUser new];
    
    ModelUser *user = [unarchiver decodeObjectForKey:@"user"];
    //完成反归档
    [unarchiver finishDecoding];
    
    return user;
}
- (void)setValue:(id)value forUndefinedKey:(NSString *)key {
  
}

@end