#import <Foundation/Foundation.h> @interface user : NSObject <NSCoding> @property(nonatomic,retain)NSString *name; @property(nonatomic,retain)NSString *email; @property(nonatomic,retain)NSString *pwd; @property(nonatomic,assign)int age; @end

#import "user.h"#define AGE @"age"#define NAME @"name"#define EMAIL @"email"#define PASSWORD @"password"@implementation user//對屬性編碼- (void)encodeWithCoder:(NSCoder *)aCoder{  [aCoder encodeInt:_age forKey:@"age"];  [aCoder encodeObject:_name forKey:AGE];  [aCoder encodeObject:_email forKey:EMAIL];  [aCoder encodeObject:_pwd forKey:PASSWORD];}//對屬性解碼- (id)initWithCoder:(NSCoder *)aDecoder{  self=[super init];  if(self)  {    self.age=[aDecoderdecodeIntForKey:AGE];    self.name=[aDecoderdecodeObjectForKey:NAME];    self.email=[aDecoderdecodeObjectForKey:EMAIL];    self.pwd=[aDecoderdecodeObjectForKey:PASSWORD];  }  return self;}-(void)dealloc{  [_name release];  [_email release];  [_pwd release];  [super dealloc];}@end

  user *userObj=[[user alloc] init];  userObj.age=33;  userObj.email=@"adfdadf@qq.com";  userObj.pwd=@"212212";  userObj.name=@"ricard";  NSString *path=[NSHomeDirectory() stringByAppendingPathComponent:@"Desktop/custom.text"];  BOOL succ=[NSKeyedArchiver archiveRootObject:userObj toFile:path];  if (succ) {     NSLog(@"Hello, World!");     user *usertemp=[NSKeyedUnarchiver unarchiveObjectWithFile:path];  }