ios - storyboard中TableViewController无法调用自定义类

Question

class AAA ViewConntroller, UITableViewController后
storyboard中TableViewController无法使用AAA这个类

但是
我在storyboard中新添加ViewController容器后，在这个容器里再加入TableView就可以使用AAA这个类

这是什么原因？
ViewConntroller, UITableViewController 不是并列的吗？

Answer 1

UITableViewController is inherited from UIViewController and adds the two protocols <UITableViewDelegate, UITableViewDataSource> on the basis of inheritance. TBVC is a subcategory of VC, not a parallel relationship as you mentioned. Look at the code

NS_ASSUME_NONNULL_BEGIN

NS_CLASS_AVAILABLE_IOS(2_0) @interface UITableViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>

- (instancetype)initWithStyle:(UITableViewStyle)style NS_DESIGNATED_INITIALIZER;
- (instancetype)initWithNibName:(nullable NSString *)nibNameOrNil bundle:(nullable NSBundle *)nibBundleOrNil NS_DESIGNATED_INITIALIZER;
- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@property (nonatomic, strong, null_resettable) UITableView *tableView;
@property (nonatomic) BOOL clearsSelectionOnViewWillAppear NS_AVAILABLE_IOS(3_2); // defaults to YES. If YES, any selection is cleared in viewWillAppear:

@property (nonatomic, strong, nullable) UIRefreshControl *refreshControl NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;

@end

NS_ASSUME_NONNULL_END