Question

@interface Esame : NSObject{
    NSString *nome;
    int voto;
    int crediti;
    int anno;
}

@property (nonatomic, retain) NSString *nome;


- (id)initWithNome:(NSString*)nome voto:(int)voto crediti:(int)crediti anno:(int)anno;

@end

This is my implementation

#import "Esame.h"

@implementation Esame

@synthesize nome;


- (id)initWithNome:(NSString*)name voto:(int)voto crediti:(int)crediti anno:(int)anno {
    if ((self = [super init])) {
        self.nome = name;



    }
    return self;
}

- (id)initWithCoder:(NSCoder *)decoder {
    if (self = [super init]) {

        nome = [decoder decodeObjectForKey:@"nome"] ;
        voto = [decoder decodeIntForKey:@"voto"];
        crediti = [decoder decodeIntForKey:@"crediti"];
        anno = [decoder decodeIntForKey:@"anno"];

    }
    return self;
}

- (void)encodeWithCoder:(NSCoder *)encoder {

    if (nome) [encoder encodeObject:nome forKey:@"nome"];

    if (voto) [encoder encodeInt:voto forKey:@"voto"];
    if (crediti) [encoder encodeInt:crediti forKey:@"crediti"];
    if (anno) [encoder encodeInt:anno forKey:@"anno"];

}


@end

I receive same strange error… expecially in the NSString… what’s wrong?

Answer 1

Try removing your conditionals before your encodeInt:; you should probably always encode all members. Also, you should probably declare that you conform to NSCoding with @interface Esame : NSObject<NSCoding>.

If this doesn’t work, try posting the error message you’re seeing.