NSCoding

使用NSCoding协议可以实现类的序列化。用于保存数据可以轻松使对象写入文件，然后再从文件中读出数据。大多数COcoa Touch类都符合NSCoding，UIImage除外。

#import <Foundation/Foundation.h>

#define key @"keyValue"

@interface BasicData : NSObject<NSCoding>

{

    NSString *property;

}

@property NSString *property;

@end

#import "BasicData.h"

@implementation BasicData

@synthesize property;

#pragma NSCoding

-(void)encodeWithCoder:(NSCoder *)aCoder

{

    //对子类进行反序列化时先对超类进行反序列化

    //[super encodeWithCoder:aCoder];

    [aCoder encodeObject:property forKey:key];

    

}

-(id)initWithCoder:(NSCoder *)aDecoder

{

    if(self==[super init])

    {

        property = [aDecoder decodeObjectForKey:key];

    }

    return self;

}

@end