Archive&Unarchive

Archive（归档）

需要归档的对象必须要遵循NSCoding协议，那么在调用archiverRootObject方法的时候，会自动调用该对象的encodeWithCoder方法

- (void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:_name forKey:@"name"];
    [aCoder encodeInteger:_age forKey:@"age"];
    [aCoder encodeObject:_tel forKey:@"tel"];
    [aCoder encodeObject:_icon forKey:@"icon"];
}

 调用方法：[NSKeyedArchiver archiveRootObject:<#(id)#> toFile:<#(NSString *)#>];

Unarchive（恢复）

需要恢复的对象在调用unarchiveObjectWithFile方法的时候，会自动调用该对象的initWithCoder方法

- (id)initWithCoder:(NSCoder *)aDecoder{
    NSLog(@".....");
    _name = [aDecoder decodeObjectForKey:@"name"];
    _age = [aDecoder decodeIntegerForKey:@"age"];
    _tel = [aDecoder decodeObjectForKey:@"tel"];
    _icon = [aDecoder decodeObjectForKey:@"icon"];
    return self;
}

 调用方法：[NSKeyedUnarchiver unarchiveObjectWithFile:<#(NSString *)#> ];