自定義的對象的解檔和歸檔

如果想對自己自定義的類進行解檔和歸檔的話 必須遵循一個協議：NSCoding

Student.h 文件

#import <Foundation/Foundation.h>

@interface Student : NSObject<NSCoding>
@property(nonatomic,strong)NSString *name;
@property(nonatomic,assign)int age;

-(instancetype)initWithName:(NSString *)name AndAge:(int)age;

@end

Student.m 文件

#import "Student.h"

@implementation Student


- (instancetype)initWithName:(NSString *)name AndAge:(int)age
{
    self = [super init];
    if (self) {
        _age=age;
        _name=name;
    }
    return self;
}
//解答時候調用 是一個初始化的方法
-(instancetype)initWithCoder:(NSCoder *)aDecoder{

    self=[super init];
    if (self) {
        _name=[aDecoder decodeObjectForKey:@"name"];
        _age=(int)[aDecoder decodeIntegerForKey:@"age"];
    }
    return self;
}

//歸檔調用該方法
-(void)encodeWithCoder:(NSCoder *)aCoder{

    NSLog(@"encodeWithCoder");
    [aCoder encodeObject:_name forKey:@"name"];
    [aCoder encodeInteger:_age forKey:@"age"];
    
}

-(NSString *)description{
    return [NSString stringWithFormat:@"name=%@,age=%d",_name,_age];
}


@end

客戶端代碼

#import "ViewController.h"
#import "Student.h"
#define PATH [NSHomeDirectory() stringByAppendingPathComponent:@"Student.qll"]
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    NSLog(@"%@",PATH);
    
    Student *stu=[[Student alloc]init];
    stu.name=@"張F";
    stu.age=13;

    NSLog(@"%@",stu);
    //歸檔
  BOOL bol=[NSKeyedArchiver archiveRootObject:stu toFile:PATH];
    
    if (bol==1) {
        NSLog(@"歸檔成功");
    }

    //解檔
    
    Student *stu1=[NSKeyedUnarchiver unarchiveObjectWithFile:PATH];
    NSLog(@"%@",stu1);

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

運行結果：