아카이빙 및 역아카이빙

준비 작업

-(void)encodeWithCoder:(NSCoder *)aCoder;

-(nullable instancetype)initWithCoder:(NSCoder *)aDecoder;

@interface Archiver : NSObject
@property (strong, nonatomic)NSString *name;
@property (assign, nonatomic)NSInteger age;
@property (strong, nonatomic)NSString *address;
@property (strong, nonatomic)UIImage *photo;
@end

-(void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:self.name forKey:@"name"];
    [aCoder encodeInteger:self.age forKey:@"age"];
    [aCoder encodeObject:self.address forKey:@"address"];
    [aCoder encodeObject:self.photo forKey:@"photo"];
}

-(instancetype)initWithCoder:(NSCoder *)aDecoder{
    if (self = [super init]) {
        self.name = [aDecoder decodeObjectForKey:@"name"];
        self.age = [aDecoder decodeIntegerForKey:@"age"];
        self.address = [aDecoder decodeObjectForKey:@"address"];
        self.photo = [aDecoder decodeObjectForKey:@"photo"];
    }return self;
}

-(NSString *)GetThefilePath:(NSString *)filePath{
    NSString *Path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 
NSUserDomainMask, YES)firstObject]stringByAppendingPathComponent:filePath];
    return Path;
}

여러 객체를 동시에 아카이빙

분류하여 보존하다

CGPoint point = CGPointMake(1.0, 2.0);
    NSString *info = @"    ";
    NSInteger value = 10;

  NSString *multiHome = [self GetThefilePath:@"multi.archiver"];

NSMutableData *data = [[NSMutableData alloc] init];

NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc]initForWritingWithMutableData:data];

[archiver encodeCGPoint:point forKey:@"kPoint"];
[archiver encodeObject:info forKey:@"kInfo"];
[archiver encodeInteger:value forKey:@"kValue"];

[archiver finishEncoding];

[data writeToFile:multiHome atomically:YES];

역압축 파일

NSMutableData *datR = [[NSMutableData alloc]initWithContentsOfFile:
[self GetThefilePath:@"multi.archiver"]];

 NSKeyedUnarchiver *unchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:datR];

CGPoint point = [unchiver decodeCGPointForKey:@"kPoint"];
NSString *info = [unchiver decodeObjectForKey:@"kInfo"];
NSInteger value = [unchiver decodeIntegerForKey:@"kValue"];

[unchiver finishDecoding];

사용자 정의 클래스에 대한 압축 및 반압축

분류하여 보존하다

NSString *name = @"  ";
    NSInteger age = 22;
    NSString *address = @"  ";
    UIImage *photo = [UIImage imageNamed:@"5.png"];
    Archiver *archiver = [[Archiver alloc]init];
    archiver.name = name;
    archiver.age = age;
    archiver.address = address;
    archiver.photo = photo;

NSMutableData *data = [[NSMutableData alloc]init];

NSKeyedArchiver *archive = [[NSKeyedArchiver alloc]initForWritingWithMutableData:data];

[archive encodeObject:archiver forKey:@"arc"];

[archive finishEncoding];

[data writeToFile:[self GetThefilePath:@"archiver.archiver"] atomically:YES];

역압축 파일

NSMutableData *data = [[NSMutableData alloc]initWithContentsOfFile:
[self GetThefilePath:@"archiver.archiver"]];

NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:data];

Archiver *arch = [unarchiver decodeObjectForKey:@"arc"];

[unarchiver finishDecoding];