iOS 归档

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

#import "AppDelegate.h"
#import "RootViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];

    self.window.rootViewController = [[RootViewController alloc] init];

    [self.window makeKeyAndVisible];
    return YES;
}

@end

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

#import "RootViewController.h"
#import "User.h"
@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    User *user = [User userInfo];
    user.name = @"LF";
    user.address = @"广州";
    NSLog(@"归档前===%@===%@",user.name,user.address);
    //归档
    [NSKeyedArchiver archiveRootObject:user toFile:[self fileToPath]];
    //解归档
    User *user2 = [NSKeyedUnarchiver unarchiveObjectWithFile:[self fileToPath]];

    NSLog(@"归档后===%@===%@",user2.name,user2.address);
    user2.address = @"北京";
    [NSKeyedArchiver archiveRootObject:user2 toFile:[self fileToPath]];
    //解归档
    User *user3 = [NSKeyedUnarchiver unarchiveObjectWithFile:[self fileToPath]];

    NSLog(@"重新归档后===%@===%@",user3.name,user3.address);
}
/**
 *  获取文件路径
 */
- (NSString *)fileToPath{
    NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    NSString *path = [docPath stringByAppendingString:@"userInfomation"];
    NSLog(@"%@",path);
    return path;
}

@end

#import <Foundation/Foundation.h>

@interface User : NSObject<NSCoding>

@property(nonatomic, copy) NSString *name;
@property(nonatomic, copy) NSString *address;

+ (User*)userInfo;

@end

#import "User.h"

#define userName @"name"
#define userAddress @"address"

@implementation User

#pragma mark 单例模式
static User *instance  = nil;
+ (User*)userInfo{
    static dispatch_once_t predicate;
    dispatch_once(&predicate, ^{
        instance = [[self alloc] init];
    });
    return instance;
}

//归档
- (void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:_name forKey:userName];
    [aCoder encodeObject:_address forKey:userAddress];
}

// 解归档
#pragma mark NSCoding协议方法
- (instancetype)initWithCoder:(NSCoder *)aDecoder{
    self = [super init];
    if (self) {
        self.name = [aDecoder decodeObjectForKey:userName];
        self.address = [aDecoder decodeObjectForKey:userAddress];
    }
    return self;
}

@end