数据的归档和解档

来源：互联网发布：贵州省大数据产业发展编辑：程序博客网时间：2024/04/29 00:36

可以把自定义对象的数据保存起来

1、在对象中写好归档解档方法

//归档会将自定义对象写入磁盘前将对象转成二进制-(void)encodeWithCoder:(NSCoder *)encoder{    [encoder encodeObject:_name forKey:@"userName"];    [encoder encodeInt:_age forKey:@"userAge"]; }//解档会把磁盘上保存的二进制数据转换成自定义对象所需要的-(instancetype)initWithCoder:(NSCoder *)decoder{    if(self = [super init]){        _name = [decoder decodeObjectForKey:@"userName"];        _age = [decoder decodeIntForKey:@"userAge"];    }    return self;    }

2、归档解档的使用范例

//归档Person *p = [[Person alloc] init];p.name = @"zhangsan";p.age = 18;[NSKeyedArchiver archiveRootObject:p toFile:@"/Users/apple/Desktop/321.plist"];//解档Person *p2 = [NSKeyedUnarchiver unarchiveObjectWithFile:@"/Users/apple/Desktop/321.plist"];NSLog(@"%@", p1.name);NSLog(@"%d", p1.age);

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