#import "ViewController.h"
#import "Person.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad
{[super viewDidLoad];//1.创建对象Person *p=[[Person alloc]init];p.name=@"deng";p.age=23;p.height=1.7;//2.获取文件路径NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];NSString *path=[docPath stringByAppendingPathComponent:@"person.deng"];NSLog(@"path=%@",path);//3.将自定义的对象保存到文件中
    [NSKeyedArchiver archiveRootObject:p toFile:path];
}-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{//1.获取文件路径NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];NSString *path=[docPath stringByAppendingPathComponent:@"person.deng"];NSLog(@"path=%@",path);//2.从文件中读取对象Person *p=[NSKeyedUnarchiver unarchiveObjectWithFile:path];NSLog(@"%@,%d,%.1f",p.name,p.age,p.height);
}
@end

#import <Foundation/Foundation.h>@interface Person : NSObject <NSCoding>@property(nonatomic,strong)NSString *name;
@property(nonatomic,assign)int age;
@property(nonatomic,assign)double height;@end

#import "Person.h"@implementation Person-(void)encodeWithCoder:(NSCoder *)aCoder
{[aCoder encodeObject:self.name forKey:@"name"];[aCoder encodeInt:self.age forKey:@"age"];[aCoder encodeDouble:self.height forKey:@"height"];
}-(id)initWithCoder:(NSCoder *)aDecoder
{if (self == [super init]) {self.name = [aDecoder decodeObjectForKey:@"name"];self.age = [aDecoder decodeIntForKey:@"age"];self.height = [aDecoder decodeDoubleForKey:@"height"];}return self;
}@end