自定义对象写入到plist文件

素颜马尾好姑娘i 2022-08-04 10:52 143阅读 0赞

// 字典－－－－ 自定义对象不能用于writeToFile保存，需要用于归档来进行保存。
        NSArray *dicArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *dicPath = [dicArray lastObject];
        dicPath = [dicPath stringByAppendingPathComponent:@"dic.plist"];
        NSLog(@"%@--------",dicPath);
        
        NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
        User *user = nil;
        for (int i = 0; i<10; i++) {
            NSString *userName = [NSString stringWithFormat:@"麦子－－%d",i];
            NSString *password = [NSString stringWithFormat:@"密码－－%d",i];
            NSString *sex = [NSString stringWithFormat:@"男"];
            user = [[User alloc] initWithUserName:userName password:password sex:sex];
            [dic setObject:user forKey:[NSNumber numberWithInt:i]];
        }
        bool flag = [NSKeyedArchiver archiveRootObject:dic toFile:dicPath];
        if (flag) {
            NSLog(@"字典保存成功");
        }else{
            NSLog(@"保存失败");
        }
        NSMutableDictionary *dicData = [NSKeyedUnarchiver unarchiveObjectWithFile:dicPath];
        NSLog(@"%@---",dicData);

[dic removeObjectForKey:[NSNumber numberWithInt:1]];
        [dic removeObjectForKey:[NSNumber numberWithInt:2]];
        [dic removeObjectForKey:[NSNumber numberWithInt:3]];
        
        [NSKeyedArchiver archiveRootObject:dic toFile:dicPath]; //删除后重新写入
        
        NSMutableDictionary *dicDataB = [NSKeyedUnarchiver unarchiveObjectWithFile:dicPath];
        NSLog(@"%@---",dicDataB);

在这之前， 自定义对象需要实现NSCopy协议，实现下面两个方法。

@implementation User
    
    - (instancetype)initWithUserName:(NSString *)userName password:(NSString *)password sex:(NSString *)sex{
        self = [super init];
        if (self) {
            self.userName = userName;
            self.password = password;
            self.sex = sex;
        }
        return self;
    
    }
    
    /***加密*/
    - (void)encodeWithCoder:(NSCoder *)aCoder{
        [aCoder encodeObject:self.userName forKey:@"userName"];
        [aCoder encodeObject:self.password forKey:@"password"];
        [aCoder encodeObject:self.sex forKey:@"sex"];
        
    }
    
    
    /**解密*/
    - (id)initWithCoder:(NSCoder *)aDecoder{
        self = [super init];
        if (self != nil) {
            self.userName = [aDecoder decodeObjectForKey:@"userName"];
            self.password = [aDecoder decodeObjectForKey:@"password"];
            self.sex = [aDecoder decodeObjectForKey:@"sex"];
        }
        return self;
    }