//系统类型的对象归档（NSString/NSArray/NSDictionary）
//1、设置归档路径，该路径需要详细到文件（不能是文件夹）
//2、得到要归档的对象
//3、通过NSKeyedArchiver调用archiveRootObject方法，进行归档
//4、解档 通过NSKeyedUnarchiver调用unarchiveObjectWithFile进行解档，注意，该方法返回值类型为id
//字符串的归档 解档
NSString *path = NSHomeDirectory();
NSString *documents = [path stringByAppendingPathComponent:@"Documents"];
NSString *strpath = [documents stringByAppendingPathComponent:@"string.txt"];
NSString *newstr = @"新闻联播";
[NSKeyedArchiver archiveRootObject:newstr toFile:strpath];
NSLog(@"%@",strpath);
NSString *str = [NSKeyedUnarchiverunarchiveObjectWithFile:strpath];
NSLog(@"---%@",str);
//数组的归档 解档
NSString *arrpath = [documents stringByAppendingPathComponent:@"arr.txt"];
NSArray *arr = @[@"1",@"2",@"3"];
[NSKeyedArchiverarchiveRootObject:arr toFile:arrpath];
NSArray *arr1 = [NSKeyedUnarchiver unarchiveObjectWithFile:arrpath];
NSLog(@"%@",arr1);
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#import "ViewController.h"
#import "Student.h"
@interfaceViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[superviewDidLoad];
NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/student.txt"];
NSLog(@"%@",path);
Student *stu= [[Student alloc]init];
stu.name = @"张三";
[NSKeyedArchiverarchiveRootObject:stu toFile:path];
Student *s1 = [NSKeyedUnarchiverunarchiveObjectWithFile:path];
NSLog(@"%@",s1.name);
}
#import <Foundation/Foundation.h>
//如果需要对自定义类进行归档，则该类需要遵循NSCoding协议，并且实现其协议方法
@interface Student : NSObject<NSCoding>
@property (nonatomic,copy) NSString *name;
@end
#import "Student.h"
@implementation Student
//实现encodeWithCoder协议方法，当系统对自定义类的对象进行归档时，会调用此方法，归档其属性
-(void) encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:self.name forKey:@"name"];
}
//实现initWithCoder方法，当系统对自定义类的对象进行解档时，会调用此方法，可以看成是一个初始化的过程，返回一个对象，并且对其属性进行解档
-(id) initWithCoder:(NSCoder *) aDecoder
{
self = [super init];
if (self) {
self.name = [aDecoder decodeObjectForKey:@"name"];
}
returnself;
}
@end