关于对象存入NSUserDefaults

#import <Foundation/Foundation.h>

@interface Student : NSObject <NSCoding>

@property (nonatomic ,copy)NSString * name;

@property (nonatomic ,copy)NSString * contact;

@end

#import "Student.h"

@implementation Student

- (void)encodeWithCoder:(NSCoder *)aCoder

{

[aCoder encodeObject:self.name forKey:@"name"];

[aCoder encodeObject:self.contact forKey:@"contact"];

}

- (instancetype)initWithCoder:(NSCoder *)aDecoder

{

if (self = [super init]) {

self.name = [aDecoder decodeObjectForKey:@"name"];

self.contact = [aDecoder decodeObjectForKey:@"contact"];

}

return self;

}

@end

#import "ViewController.h"

#import "Student.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

Student * xiaoli = [[Student alloc]   init];

xiaoli.name = @"sujianbo";

xiaoli.contact = @"18811569851";

NSData * data = [NSKeyedArchiver archivedDataWithRootObject:xiaoli];

NSUserDefaults * user = [NSUserDefaults standardUserDefaults];

[user setObject:data forKey:@"su"];

[user synchronize];

NSData * su = [user objectForKey:@"su"];

Student * jian = [NSKeyedUnarchiver unarchiveObjectWithData:su];

NSLog(@"name--->%@,contact---->%@",jian.name,jian.contact);

}

@end

------------打印信息

2016-03-04 09:34:08.904 NSUserDefaults[943:25413] name--->sujianbo,contact---->18811569851