自定義對象要實現歸檔必須實現NSCoding協議

NSCoding協議有兩個方法，encodeWithCoder方法對對象的屬性數據做編碼處理，initWithCoder解碼歸檔數據來初始化對象。

?

#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:_ageforKey:@"age"];

? ? [aCoder encodeObject:_nameforKey:AGE];

? ? [aCoder encodeObject:_emailforKey:EMAIL];

? ? [aCoder encodeObject:_pwdforKey: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];

? ? }

? ? returnself;

}

-(void)dealloc

{

? ? [_name release];

? ? [_email release];

? ? [_pwd release];

? ? [super dealloc];

}

@end

?

main函數的調用

?

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];}

?

?

總結

以上是生活随笔為你收集整理的objective-C 自定义对象归档的实现的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。