iOS 数据的归档（NSKeyedArchiver ）与数据的解档（NSKeyedUnarchiver) 加密 提高安全性

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
/**
 *  创建归档与解档的按钮
 */
@property(strong,nonatomic) UIButton *btnAchiver;
@property(strong,nonatomic) UIButton *btnUnAchiver;


#import "ViewController.h"
//宏定义 根目录
#define PATH [NSHomeDirectory() stringByAppendingPathComponent:@"test.add"]
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"%@",PATH);
    //创建归档的按钮
    self.btnAchiver=[[UIButton alloc] initWithFrame:CGRectMake(100, 100, 200, 50)];
    //为按钮添加背景色
    self.btnAchiver.backgroundColor=[UIColor redColor];
    //为按钮添加标题
    [self.btnAchiver setTitle:@"数据归档" forState:UIControlStateNormal];
    //按钮触发事件
    [self.btnAchiver addTarget:self action:@selector(DataArchiver) forControlEvents:UIControlEventTouchUpInside];
    //将按钮添加到父视图上
    [self.view addSubview:self.btnAchiver];
    
    //创建解档的按钮
    self.btnUnAchiver=[[UIButton alloc] initWithFrame:CGRectMake(100, 200, 200, 50)];
    //为按钮添加背景色
    self.btnUnAchiver.backgroundColor=[UIColor redColor];
    //为按钮添加标题
    [self.btnUnAchiver setTitle:@"数据解档" forState:UIControlStateNormal];
    //按钮触发事件
    [self.btnUnAchiver addTarget:self action:@selector(DataUnArchiver) forControlEvents:UIControlEventTouchUpInside];
    //将按钮添加到父视图上
    [self.view addSubview:self.btnUnAchiver];

}
//事件 归档
-(void)DataArchiver
{
    //创建归档的集合
    NSArray *arr=@[@"yj",@"lm",@"tt"];
    //创建归档的字符串
    NSString *str=@"guiyangxueyuan";
    //集合和字符串是要归档
    BOOL bol=YES;
    //初始化可变数据
    NSMutableData *data=[NSMutableData data];
    //初始化归档
   NSKeyedArchiver *Archiver= [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    //把集合归档
    [Archiver encodeObject:arr forKey:@"arr"];
    //把字符串归档
    [Archiver encodeObject:str forKey:@"str"];
    //是要归档
    [Archiver encodeBool:bol forKey:@"bol"];
    //完成归档
    [Archiver finishEncoding];
    //把数据归档到PATH目录
    BOOL bol2= [data writeToFile:PATH atomically:YES];
    NSLog(@"%d",bol2);
    
}
//事件 解档
-(void)DataUnArchiver
{
    //把解档数据存在PATH目录下
    NSData *data=[NSData dataWithContentsOfFile:PATH];
    //把解档的放在数据里
    NSKeyedUnarchiver *Unarchiver=[[NSKeyedUnarchiver alloc] initForReadingWithData:data];
    //创建一个新的集合存解档集合的数据
    NSArray *newarr=[Unarchiver decodeObjectForKey:@"arr"];
    //创建一个新的字符串存解档字符串的数据
   NSString *newstr=[Unarchiver decodeObjectForKey:@"str"];
    NSLog(@"%@,%@",newarr,newstr);
    
}