语法错误，有人可以帮我识别这里有什么问题吗？

Question

- (void)viewDidLoad{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.[super viewDidAppear:YES];// Make self the delegate and datasource of the table view.
    self.tblPeople.delegate = self;
    self.tblPeople.dataSource = self;
    // Initialize the dbManager property.
    self.dbManager = [[DBManager alloc] initWithDatabaseFilename:@"sampledb.sql"];
    // Load the data.
    [self loadData];
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{                  EditInfoViewController *editInfoViewController = [segue             destinationViewController];
    editInfoViewController.delegate = self;
    editInfoViewController.recordIDToEdit = self.recordIDToEdit;
}

这三个语法有错误：

self.tblPeople.delegate = self; // Assigning to 'id<UITableViewDelegate> _Nullable' from incompatible type 'ViewBase *const __strong'    

self.tblPeople.dataSource = self; // Assigning to 'id<UITableViewDataSource> _Nullable' from incompatible type 'ViewBase *const __strong'

editInfoViewController.delegate = self; // Assigning to 'id<EditInfoViewControllerDelegate>' from incompatible type 'ViewBase *const __strong'