EXC_BAD_ACCESS после didSelectRowAtIndexPath

Question

Мне нужна помощь с EXC_BAD_ACCESS во время функции didSelectRowAtIndexPath в UIViewController.

Свойства:

@property (strong, nonatomic) Album *selectedAlbum; 
@property (strong, nonatomic) NSMutableArray *artistAlbums; 
@property (weak, nonatomic) IBOutlet UITableView *albums; 

загружающего NSMutableArray "связан" с UITableView:

- (void) loadAlbums { 

    self.artistAlbums = [self.albumService getAlbumsFromDatabase]; 

    for (Album * album in self.artistAlbums) { 
     // No error 
     NSLog(album.title); 
     NSLog(album._id); 
    } 
} 

AlbumService, getAlbumsFromDatabase:

- (NSMutableArray *)getAlbumsFromDatabase: { 

    NSMutableArray * result = [@[] mutableCopy]; 

    // FavAlbumDpo.id is NSNumber 
    for (FavAlbumDpo *albumdpo in [self.databaseManager getAllAlbums]) { 
     Album *album1 = [[Album alloc]init]; 
     album1._id = [albumdpo.id stringValue]; 
     album1.title = albumdpo.title; 
     [result addObject:album1]; 
    } 

    return result; 
} 

Функция didSelectRowAtIndexPath:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ 
    self.selectedAlbum = self.artistAlbums[indexPath.row]; 
    for (Album * album in self.artistAlbums) { 
     NSLog(album.title); // Print the title 
     NSLog(album._id); // EXC_BAD_ACCESS 
    } 
    [self performSegueWithIdentifier:SEGUE_ID sender:self]; 
} 

Album.h:

@interface Album : NSObject 
@property (strong, nonatomic) NSString *title; 
@property (assign, nonatomic) NSString *_id; 
@end 

Album.m:

@implementation Album 
- (instancetype)init{ 
    self = [super init]; 
    if (self){ 
     self.title = @"title"; 
     self._id = @"id"; 
    } 

    return self; 
} 
@end 

Answer 1

Строка свойства _id освобождается. Изменение

@property (assign, nonatomic) NSString *_id; 

в

@property (strong, nonatomic) NSString *_id;