iOS 设计中数据持久化—归档NSKeyedArchiver与解档NSKeyedUnarchiver的方法

思路：先创建一些数据文件 ，之后先对创建的数据文件使用归档方法（函数方法 [NSKeyedArchiver archiveRootObject:归档内容 toFile:存储路径];）进行归档，检查归档成功与否，若成功，之后再按解档方法（函数方法 [NSKeyedUnarchiver unarchiveObjectWithFile:解档路径];）进行解档

代码实现如下:
ViewController.h

#import <UIKit/UIKit.h>
#define Path [NSHomeDirectory() stringByAppendingPathComponent:@"test.src”]//宏定义 归档路径
@interface ViewController : UIViewController
//控制归档方法的按钮
@property(strong,nonatomic)UIButton *Buttonarchiver;
//控制解档方法的按钮
@property(strong,nonatomic)UIButton *ButtonUnarchiver;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"%@",Path);
//归档
NSArray *arr=@[@"AA",@"BB",@"CC"];
//判断归档成功与否
BOOL bol= [NSKeyedArchiver archiveRootObject:arr toFile:Path];
NSLog(@"归档成功与否=%d",bol);

//创建控制归档方法的按钮
self.Buttonarchiver=[[UIButton alloc]initWithFrame:CGRectMake(100, 100, 50, 50)];
self.Buttonarchiver.backgroundColor=[UIColor redColor];
[self.Buttonarchiver setTitle:@"归档" forState:UIControlStateNormal];
//调用方法
[self.Buttonarchiver addTarget:self action:@selector(dataArchiver) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.Buttonarchiver];

//创建控制解档方法的按钮
self.ButtonUnarchiver=[[UIButton alloc]initWithFrame:CGRectMake(200, 100, 50, 50)];
self.ButtonUnarchiver.backgroundColor=[UIColor redColor];
[self.ButtonUnarchiver setTitle:@"解档" forState:UIControlStateNormal];
//调用方法
[self.ButtonUnarchiver addTarget:self action:@selector(dataUnArchiver) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.ButtonUnarchiver];

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{
//获取归档的内容
NSArray *array=[NSKeyedUnarchiver unarchiveObjectWithFile:Path];
NSLog(@"%@",array);

}

//归档方法

-(void)dataArchiver

{
//初始化需要归档的内容
NSArray *array=@[@"qq",@"ww",@"yy"];
NSString *str=@"lamco.com.cn";
BOOL bol=YES;
//初始化可变data
NSMutableData *data=[NSMutableData data];
//保存data到KeyedArchiver
NSKeyedArchiver *archiver=[[NSKeyedArchiver alloc]initForWritingWithMutableData:data];

//存档方式
[archiver encodeObject:array forKey:@"array"];
[archiver encodeObject:str forKey:@"str"];
[archiver encodeBool:bol forKey:@"bol" ];
//完成存档
[archiver finishEncoding];
//查看存档后的内容
NSLog(@"archiver=%@",archiver);
BOOL bol1=[data writeToFile:Path atomically:YES];
NSLog(@"%d",bol1);

}

//解档方法

-(void)dataUnArchiver

{
//获取文件路径
NSData *data=[NSData dataWithContentsOfFile:Path];
//读取路径中的内容
NSKeyedUnarchiver *keyunarchiver=[[NSKeyedUnarchiver alloc]initForReadingWithData:data];
//以关键字获取解档的内容
NSArray *testArray=[ keyunarchiver decodeObjectForKey:@"bol"];
NSLog(@"testArray=%@",testArray);

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];

}

@end