CYC- 复杂对象归档 反归档

#import <Foundation/Foundation.h>
@interface Student : NSObject<NSCoding>
@property (nonatomic,retain) NSString *name;
@property (nonatomic,assign) NSInteger age;
@property (nonatomic,retain) NSData *data;
@end

#import "Student.h"
@implementation Student
- (void)dealloc
{
[_name release];
[super dealloc];
}

/  归档 进行编码
- (void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:self.name forKey:@"name"];
[aCoder encodeInteger:self.age forKey:@"age"];
[aCoder encodeObject:self.data forKey:@"data"];

}

//  反归档 解码
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super init];
if (self) {

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

}
return self;
}

@end

//  归档复杂对象
- (void)archive
{
// 获取Documents文件路径
#define kDocumentsPath [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]

Student *student = [[Person alloc] init];
student.name = @"wangLong";
student.age = 18;
//   UIImagePNGRepresentation([UIImage imageNamed:@"shenJ.jpg"])
//   将png图片 转化成data
student.data = UIImagePNGRepresentation([UIImage imageNamed:@"shenJ.jpg"]);

//  创建一个可变的DATA 进行对 复杂对象编码后的储存
NSMutableData *data = [NSMutableData data];

//  创建归档对象
NSKeyedArchiver *archive = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
//  进行归档
[archive encodeObject:student forKey:@"student"];
//  归档结束
[archive finishEncoding];

NSString *archivePath = [kDocumentsPath stringByAppendingPathComponent:@"saveStudent"];
NSLog(@"%@",archivePath);

//  写入归档文件
[data writeToFile:archivePath atomically:YES];
[student release];
[archive release];

}
//  反归档
- (void)unarchive
{
NSString *archivePath = [kDocumentsPath stringByAppendingPathComponent:@"saveStudent"];

//  按路径读取 归档的data文件
NSData *data = [NSData dataWithContentsOfFile:archivePath];

//  创建反归档对象
NSKeyedUnarchiver *afrinde = [[NSKeyedUnarchiver alloc]initForReadingWithData:data];
//  取出归档的对象
Student *student = [afrinde decodeObjectForKey:@"student"];

UIImage *image = [UIImage imageWithData:student.data];

NSLog(@"%@",student.name);
}