在目标C中出现“线程90：EXC_BAD_ACCESS（代码= 1，地址= 0x18）”导致应用崩溃

Question

 -(void)writeAllCategoriesInJson:(NSDictionary *)dict
 {
     NSArray *arry_allCategory = [[NSArray alloc] initWithObjects:dict, nil];

     NSError *error;
     NSData *jsonData = [NSJSONSerialization dataWithJSONObject:arry_allCategory options:NSJSONWritingPrettyPrinted error:&error];
     if (!jsonData && error){
         NSLog(@"Error creating JSON: %@", [error localizedDescription]);
         return;
     }

     NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

     // Build the path, and create if needed.
     NSString* filePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
     NSString* fileName = @"Categories.json";
     NSString* fileAtPath = [filePath stringByAppendingPathComponent:fileName];

     if (![[NSFileManager defaultManager] fileExistsAtPath:fileAtPath]) {
         [[NSFileManager defaultManager] createFileAtPath:fileAtPath contents:nil attributes:nil];
     }

     // The main act...
     [[jsonString dataUsingEncoding:NSUTF8StringEncoding] writeToFile:fileAtPath atomically:NO];
}

此处应用

崩溃

  

“线程90：EXC_BAD_ACCESS（代码= 1，地址= 0x18）”

在下面的行上：

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:arry_allCategory options:NSJSONWritingPrettyPrinted error:&error];

此行的问题是什么。它一直运行良好，并且在崩溃之间一直正常运行。我尽力了，但是问题仍然存在。