ios24-数据持久化-对象归档(2)

        NSKeyedUnarchiver *unArchiver=[[NSKeyedUnarchiver alloc]initForReadingWithData:data];

        //完成student对象的实例化

        Student *stu=[unArchiver decodeObjectForKey:@"stuobj"];

        [unArchiver finishDecoding];

        //设置显示

        tfId.text=stu.studentId;

        tfName.text=stu.studentName;

        tfClass.text=stu.studentClass;

    }

    //进行解压

   
}

//

-(NSString *)getFilePath{

    //设置文件保存的路径

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

   
    //获取documents路径

    NSString *documentPath = [paths lastObject];

    //定义全路径

    NSString *savePath = [documentPath stringByAppendingPathComponent:@"student.achiver"];

    return savePath;

}

- (BOOL)textFieldShouldReturn:(UITextField *)textField{

    [textField resignFirstResponder];

    return YES;

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    tfId.delegate=self;

    tfName.delegate=self;

    tfClass.delegate=self;

// Do any additional setup after loading the view, typically from a nib.

}

- (void)viewDidUnload

{

    [super viewDidUnload];

    // Release any retained subviews of the main view.

    // e.g. self.myOutlet = nil;

}

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

}

- (void)viewDidAppear:(BOOL)animated

{

    [super viewDidAppear:animated];

}

- (void)viewWillDisappear:(BOOL)animated

{

[super viewWillDisappear:animated];

}

- (void)viewDidDisappear:(BOOL)animated

{

[super viewDidDisappear:animated];

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    // Return YES for supported orientations

    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);

}

@end

2.建立一个student类

//

//  Student.h

//  ios24-saveObjectToFile