iOS - 保存自定義對象(姓名,性別.....)

我是將聊天記錄存到本地，裏邊用到了自定義的對象，把數據轉成Data格式存到本地，在轉Data格式的時候報錯了，這時候需要先將自定義對象進行歸檔纔可以轉Data格式。方法如下：

一、在.h文件中聲明協議

#import <Foundation/fountion.h>

@interface Person : NSObject <NSCoding>
@property (nonatomic,copy) NSString * name;
@property (nonatomic,copy) NSString * sex;
@property (nonatomic,copy) NSString * name1;
@property (nonatomic,copy) NSString * name2;

二、在.m文件中實現encodeWithCoder和intiWithCoder方法

#import "Person.h"
@implementation Person
-(void)encodeWithCoder:(NSCoder *)aCoder
{
    [aCoder encoderObject:self.name forKey:@"name"];
    [aCoder encoderObject:self.sex forKey:@"sex"];
    [aCoder encoderObject:self.name1 forKey:@"name1"];
    [aCoder encoderObject:self.name2 forKey:@"name2"];

}

-(id)initWithCoder:(NSCoder *)aDecoder{
    if (self = [super init]) {
        self.name = [aDecoder  decodeObjecForKey:@"name"];
        self.sex = [aDecoder  decodeObjecForKey:@"sex"];
        self.name1 = [aDecoder  decodeObjecForKey:@"name1"];
        self.name2= [aDecoder  decodeObjecForKey:@"name2"];
    }
    return self;
}

歸檔之後就把對象存儲到字典或數組裏，轉成Data格式的，再存儲到本地即可。

//字典轉data

+(NSData *)returnDataWithDictionary:(NSDictionary *)dict
{
    NSMutableData * data = [[NSMutableData alloc] init];
    NSKeyedArchiver * archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    [archiver encodeObject:dict forKey:@"talkData"];
    [archiver finishEncoding];

    [data autorelease];
    [archiver autorelease];

    return data;
}

//路徑文件轉dictonary

+(NSDictionary *)returnDictionaryWithDataPath:(NSString *)path
{
    NSData * data = [[NSMutableData alloc] initWithContentsOfFile:path];
    NSKeyedUnarchiver * unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
    NSDictionary * myDictionary = [[unarchiver decodeObjectForKey:@"talkData"] retain];
    [unarchiver finishDecoding];
//    NSLog(@"%@", myDictionary);
    [unarchiver autorelease];
    [data autorelease];

    return myDictionary;
}