iOS 数据归档----温故而知新
#import "StudyViewController.h"
#import "person.h"
@interface StudyViewController ()
@property (nonatomic, copy)NSString *filePath;
@end
@implementation StudyViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
person *p1 = [[person alloc]init];
p1.name = @"zhangshan";
person *p2 = [[person alloc]init];
p2.name = @"lisi";
person *p3 = [[person alloc]init];
p3.name = @"wangwu";
NSArray *pathArr = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [pathArr[0] stringByAppendingPathComponent:@"model"];
self.filePath = filePath;
//归档单个数据
//[NSKeyedArchiver archiveRootObject:p toFile:filePath];
//归档多个数据
NSMutableData *data = [[NSMutableData alloc]init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc]initForWritingWithMutableData:data];
[archiver encodeObject:p1 forKey:@"p1"];
[archiver encodeObject:p2 forKey:@"p2"];
[archiver encodeObject:p3 forKey:@"p3"];
[archiver finishEncoding];
if ([data writeToFile:self.filePath atomically:YES]) {
NSLog(@"归档成功。。。");
}
}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if ([[NSFileManager defaultManager]fileExistsAtPath:self.filePath]) {
//解档单个数据
// person *p = [NSKeyedUnarchiver unarchiveObjectWithFile:self.filePath];
// NSLog(@"p.name =%@",p.name);
//解档多个数据
NSData *data = [NSData dataWithContentsOfFile:self.filePath];
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:data];
person *p1 = [unarchiver decodeObjectForKey:@"p1"];
person *p2 = [unarchiver decodeObjectForKey:@"p2"];
person *p3 = [unarchiver decodeObjectForKey:@"p3"];
NSLog(@"p1 =%@\np2 =%@\np3 =%@",p1.name,p2.name,p3.name);
}
}
@end
#import <Foundation/Foundation.h>
@interface person : NSObject<NSCoding>
@property (nonatomic, copy)NSString *name;
@end
#import "person.h"
@implementation person
-(instancetype)initWithCoder:(NSCoder *)aDecoder
{
self = [super init];
if (self) {
self.name = [aDecoder decodeObjectForKey:@"name"];
}
return self;
}
-(void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:self.name forKey:@"name"];
}
@end
